[7] 



forger and with a large rounded an J thick hand, all the feet with only one claw. 

 lUimp with four large segments, without lateral appendages, but with the usual 

 ones beneath. Tail with short and recurved appendages. — It belongs to the fam- 

 ily Garamaria, the name was that of an ancient fluviatiie God of Thessaly. 



59. Sperctiiiis lua'duB. Shining brown, eyes black, nearly round ; appendages 

 of the tail shorter than the last article, curved outwards, with two articles and a 

 terminal filament. — Discovered in the springs, and brooks near Lexington, Ky. 

 Length about one-third of an inch, almost black when in the water, olivaceous 

 brown when oat of it, and pale when dry. Bodv arched, antenna descending. It 

 swims well. 



IV. N. G. I,EPtr.rnr>. Four antenna shorter than the head, nearly equal, trun- 

 cate, with a single segment. Body rather compressed and straight, with twelve 

 segments, all with a large lateral scale except the three anterior and the last, pos- 

 terior segments and scales longer. First pair of feet with a large oblong cheli- 

 form and cuspidate hand ; the second and third pair cylindrical pincifcrnus or 

 with two cylindrical and truncate fingers, the four other pairs slender ; all the 

 ieet without real claws. Appendages beneath the rump almost similar to the 

 hind feet ; those of the tail short and with single segments.— Another fresh water 

 genus of Shrimps, of the family Gammaria. The name means lateral scales. 



40. Lepleurtu HviUaris. Olivaceous, eyes very faint irregular ; appendage of the 

 tail truncate straight obliqual ; antenna nearly horizontal, feet longer tfian the 

 breadth of the body.— I have detected it in the brooks of the mountains of Penn- 

 sylvania and at Shannon run, near Bedford Springs. Lengl h about half an inch ; 

 Jt crawls on the stones rather than swims or jumps. 



V N. G. Liuckus. Four antenna, the two upper ones very long, with four large 

 articles, increasing in size upwards, and many small ones ; the two lower antenna 

 shorter than the head and the fourth article of the long antenna, setaceous, adhe- 

 rent with the upper ones at their base. Mead rounded, eyes lateral and rounded. 

 Feet with a single claw; body pinnatifid with seven segments without lateral 

 scales j tau large, rounded, utriculated beneath, with concealed bifid appendages. 

 1 bis fresh water genus belongs to the family Onuda and sub-family Aaehtia. the 

 name was that of a spring in Greece. 



41 Li, ceusfontinaHt. Blackish, upper antenna one-third of total leneth ; seg- 

 ments broader than (he head and truncate lateraly, separated by dee P clefts- 

 •>ack convex ; tail sennfrdobe, margin livalin, center raised longitudinally —I del 

 .ected it in October 1819 in a spring near Lexington. It swims well j feet short 

 with tour articles, one of win I, is a claw , the posterior ones longer and more 

 •lender. Length one-fourth of an inch without the antenna; breadth about one- 



l°H v i 77 e , , gLh -- T: - al br °" d " nd twice M ,on S «S t»»e head ; appendages short, 

 articulated, seldom jutting out of the utricule. s * 



VI CLASS. ENTOMIA.— THE INSECTS. 



anJLi'' n SK n STA ' "fy*^ 2SSc ' d • ^ll'nine segments, including the head 

 and tail. Head large ; forehead notched ending in a large curved forccM wit 



ui tneend. Lyes lateral round ; antenna inserted before the e\cs as lon<ras the 

 frontal forceps, with two long segments and two t ,„i, J tl re a. Is Fourteen at 

 eral legs, with two articles and two claws besides, or ,fid at t end \ v. , v 1 ,V 



£ 'JZg? fami * »***- ^ ■**"** *E£^££S Z 



I V<\,»1 iS 'lf U '' C T- Flll vous brown, frontal forceps as lour as the head tail bi 

 %*g£*gA near Baltimore by Mr. H. Maydef,. It comes &*&££ 



eachwitf," on^! l "7n ™\ 1 ?r l,y de P PCMBd .. ll ««r» nanow, with many segments 



truncate ; eyes obsolete- L In ifiVr COM ^ d . b * the Ul K er <>»**• Head 



Worm, mult, articulated nearly lateral, and dis 



