428 



BrLLETIN 54, TTNTTED STATES NATIONAL MUSEUM. 



The l<'os of tho Hr.st pair iin» slendiM-; the (hictylus is serrate with 

 numerous closely set short spines alon*^- the inner margin, the pro- 

 podus is narrow, oval in shape, and armed in the male with one long- 

 spine. 



The color is reddish-l)rown mottled with white. All the free 



margins of the ])ody are fringed with hairs. The lateral margins of 



h the segments and the caudal segment are 



armed with spines. The uropoda and the 



legs are spinulose. 



A large luimber of specimens were col- 

 lected by Mr. William Palmer and Dr. Paul 

 Bartsch at Washington Ditch, Dismal 

 Swamp, Virginia. 



T(/pr. —Cat. No. 23910. U.S.N.M. 



ASELLUS AQUATICUS ( Linn^us). 



(})il<;cu.s uquuticuf< LiNXiKUS, Fauiia Suecica, 2(1 



ed., 1761, p. 500. 

 /Sqiiilla aselhis De Geer, Menioires pour servir 

 u I'histoire des Insectes, VII, 1778, p. 496. 

 Oriiscu>< aquaficns O. Fabricius, Fauna gi'oen- 



landica, 1780, p. 251. 

 Afdhis vulgaris Latreille, Hist. Nat. Crust, et 

 des Insectes, VI, 1803, p. 359; VII, pi. lviii, 

 fig. 1. 

 Idoti'd aquatica Latreii.i^e, Knevcl. Mt'th., Pt. 24, 1818, p. 6, pi. cccxxviii, figs. 



21-22. 

 Asellus V'ulgnris Desmarest, Consid. Generales sur la classe des C'rustaees, 1825, 



p. 813, pi. XLix, figs. 1-2. 

 AselluK gri'iiilaiKliais / Kr0yer, Kongelige <lanske videnskabernes Selskabs 



naturvidenska])elige og niathematiske Afhandlinger, VII, 1838, p. 318. 

 Asellus oquoticux Guerin-Meneville, Iconographie du Regne animal de Cuvier, 

 pi. LI, fig. 3. — Sars, Histoire naturelle des Crustaces d'eau dou(;e de la 

 Norvege, 1867, p. 46, pis. viii-x. 

 Asellus gr-onlandicus Packard, Mem. Bost. Soc. Nat. Hist., I, 1867, p. 296. 

 Asdlnsaquaticus'BATE and W^EST^xooI), Brit. Sessile-eyed Crust. , II, 1868, p. 341. — 

 Bovallius, Bihang till K. Sv. Vet.-Akad., Handl., XI, No. 15, 1886, pp. 

 7-10. (See Bovallius for full synonymy. ) 

 Asdlus gronlandicvsf Hansen, Videnskabelige INIeddelelser fra den natnrhist( )riske 



Forening i Kjabenhavn, 1887-88, p. 190. 

 Asdlus aquaficus G. O. Sars, ('rust, of Norway, II, 1899, p. 97. 



Loadlties. — (ireeidand (Fabricius): Greeidand (Kr0yer): Labrador 

 at S(iuare Island and llopedale (Packard); ponds and streams all over 

 Kui'ope. 



Fig. 485.— Asellus^ attknuatus. a, 

 Leg of the first pair. ■: 39. 

 /), Third pleopod of fkmai.e. 

 ■: 205. c, First pleopod of fk- 

 mai.e. 



