Order III Parasita Wingless; feet b; abdomen without articulations of movable appendages; eyes 2 or 4, single; mouth mostly internal, exhibiting externally either a snout or mamilla, containing a retractile sucker or two membranous and approximating lips, with 2 hooked mandibles.
Genus [Perciculus?] Lin. Deg. Head distinct; feet b articulated on teh thorax; antennae 2; eyes 2, having distinct facets; mouth consisting of a rostrum; enveloping an extensile sucker; destitute fo mandibles or jaws. humanis corphoris. Deg. Dirty white; immaculate; emarginations of the abdomen less salient than in the following species. humanis caphitis. Def. Cinereous; the spaces in which the stigmata are placed brown or blackish; lobes of the abdomen rounded. [illegible] (see below
Phthirus—Leach Body wide, round; thorax short; 4 poserior feet very stout pubis, Lin. abdomen emarginate behind; legs chiliform; antennae 5=jointed
ricinoides, Lin [Perriculus] Abdomen orbicular, marked with a white line, [sculellrum?] 3=lobed; snouts white. (American)
Order IV Suctoria Wingless; mouth of 3 pieces enclosed between two articulated laminae, which when united form a cylindrical or comical probosis or [rortum?] the base of which is covered by two scales.
Pulex Lin. Body oval, compressed, feet 6; rostrum jointed and consisting of two plaes; enveloping a sucker irritans, Lin. Deep chestnut brown, the legs paler; the segments bordered with short stiff hairs penetrans Lin.
Astacus Antennae inserted in nearly the same horizontal line; 6 anterior feet didactyle; the anterior pair longest; middle division of the anterior hair longest; middle division of the caudal lamelloe broader at base; external division biparted species Bartonii, Latr. Rostrum mucronate convcave; thorax unarmed; hand short, destitute of spines; fingers moderate affinis, Say. Rostrum mucronate, subcanaliculate, 2=spined; a spine behind each eye, and a large geminate one, on each side of the thorax; hand + thumb on the inner edge scabrous Blandingii, Harlan. Rostrum mucronate, [canaliculate], slightly notched at the extremity; a spine behind each eye; arms tuberculated; fingers unequal southern states.
Division 3. Articulated animals with articulated feet
Class 1st Crustacea Having generally a crustaceous covering more or less solid; provided with distinct organs of circulation; respiring by means of bronchia
Order I. Decapoda Branchia pyramidal; in the form of leaflets, situated near the last four feet=jaws, and of the feet, concealed beneath the sides of the shell; head not distinct from the trunk of the body eyes [illegible]
Genus Astacus Gron. Fab. page 3
Order III Amphipada Eyes senile, immovable; head separated from the thorax; mandibles with palpi; the post=abdomen provided with a branchial transversely and with many articulations or bronchiae.
Genus Gammarus Fab. [p.1?].
Order V. Isopoda Head distinct; eyes senile, granulated; mandibles without palpi; jaws, three pairs the lower ones like two small feet; or having a lip with a [illegible]; badly depressed + divided into from 3 to 7 segments; feet 10 to 14; tail 7 or more segments; hearing branchiae; frequently covered with laminae; with 4 antennae; destitute of a shell.
[Genus?] Ascellus p1. Philoscia 1. Oniscus-1. Porcellis 1. Armadilla 2.
Order VI. Branchiopoda Mouth a labrum, 2 mandibles, a ligula, + 1 or 2 pair of jaws + branchiae the first of which when there are several always anterior.
[Genus?] Cyclops-2. Cythere 2. Daphnia 2