OAMMAIUII.K. 1-11 



ovnto. rti)cx subaciUe ; pntixulos of second pair (femalr?) iiuk li 

 smaller, but similar in form. IVreiopoda all short ; first ainl 

 Rci'ond pairs loniJ:cr tlian tlu' second pair of gnatliopoda, siili- 

 oqnal ; la.st two pairs subeciual ; bases vcr}' broad, its posterior 

 mar<i:in imperfectly serrulate. 

 " Length 4 to 5 lines. 



•' Hah. C\)llectcd at Hermit Island by Lieut. Case." — Dana. 



13. Atyhis fissicauda. (Plate XXVIl. fig. :3.) 



Ijihiinodia tissicanda, Ihoia, U.S. Explor. Exjml. p. 029. pi. Q>\\. f. 4. 

 Anipliitoo lissicaiula, Duna, Proc. Aimr. Acad. Sci. Bost. iii. p. 214. 



" Body compressed. Coxte largo. Eyes reniform. Telson di^dded 

 nearly to the base, and each part emarginate at apex. Antennae 

 subequal : tho>superior rather the longer, half as long as the body ; 

 base much .shorter than the flagellum, and a little shorter than the 

 base of the inferior pair : seta) of imder side of antenna) rather 

 long; peduncle of inferior pair much shorter than the fiagcUum. 

 Fii-st pair of gnathopoda small ; propodos oblique at apex (palm), 

 and not broader. Propodos of the second pair of gnathopoda 

 moderateh' small, ciliated below ; apex (palm) slightly obli(jue ; 

 daetylos short. Three posterior pairs of pereiopoda sube(|ual, 

 rather short ; setaa short. Posterior pair of pleopoda long. 



'' Length (not given). 



'' Hah. Near Vifia del Mar, nine miles north of Valparaiso, from 

 pools of water among rocks of the sea-.shorc at low-tide, where it 

 occurs concealed among the stones of the bottom." — Dana. 



14. Atylus Capensis. (Plate XXVII. fig. 4.) 

 Iphimedia Capensis, Dana, U.S. Explor. Exped. p. 931. pi. 63. f. 5. 



"Female? — Eyes subreuiform. Antennae subequal, nearly naked. 

 Superior pair rather the longer, about half as long as the body ; 

 peduncle very short, about one-third as long as the flagellum ; 

 joints of the flagellum somewhat oblong, the alternate ones a little 

 broader at the apex, and bearing two or three seta) longer tluui 

 the joint and closely appressed to it, the other seta) very short. 

 Peduncle of inferior pair quite short. Two pairs of gnathopoda 

 small ; propoda oblong, margins nearly parallel, under margins 

 hir.sute, apices oblique, truncate, forming the palma) ; dactyla not 

 longer than the palma?, palma? nearly naked ; carj)i oblong, half as 

 long as the propoda, obtuse below and hirsute. Four posterior 

 pairs of pereiopoda .subequal, slender, seta) aU very short ; pro- 

 poda slender ; seta) of lower margin in seven sets, and aliout IkiH 



