coRoriuiD-E. 277 



directed tooth tipped ^nth hairs ; j)rop()dos trianj^dar, superior 

 inari,'in artuato ; pahu oblitpie, exteiuUng the entire leiip:tli of the 

 interior margin, deeply waved, having two prominent lobes, and 

 detincd by a prominent obtuse tooth ; dactylos scarcely as long as 

 the palm, serrated upon the inner margin. Second pair of gnatho- 

 poda small ; propodos scarcely broader than the cari:)us, and as long 

 again as broad, having the superior margin arcuate, the inferior 

 neiu'ly parallel with it, and both fringed with fasciculi of hairs ; 

 palm concave, fringed with slight, equally distant prominences, 

 from each of which arises a solitary straight cilium ; the inferior 

 angle produced, against which the short straight dactylos impinges. 

 Three posterior pairs of perciopoda subequal. 

 Length ^y-ths of an inch. 



Uah. Weymouth (Gosse). 



Mr. Gosse considers this species to be Unciola irrorata of Say ; but, 

 independently of its possessing character which separate it generi- 

 cally from. Unciola, the animal differs in other respects from Say's 

 description. 



2. Dryope crenatipalma, n. s. (Plate XLYII. fig. 2.) B.M. 



Ccphalon having a very short rostnim between the antennae. Infero- 

 posterior angle of the first three segments of the pleon posteriorly 

 produced. Eyes round, black. Superior antennae half as long as 

 the animal ; second joint of the peduncle t'wice as long as the first ; 

 flagellum as long as the second and third joints of the peduncle. 

 Inferior antenna; having the peduncle as long as the peduncle of 

 the superior ; flagellum not longer than the last joint of the pc- 

 dimcle. First pair of gnathopoda having the carpus inferiorly pro- 

 duced to a jwint ; propodos subtriangular, superior margin arcuate ; 

 palm nearly the entire length of the inferior margin, very oblique, 

 defined by a prominent tubercle tipped \\ith a strong spine, irre- 

 gidarly waved, ha\'ing a very vide protuberance, with the margin 

 minutely crenulatc ; dactylos as long as the palm, ha\-ing the inner 

 margin serrated. Second pair of gnathopoda having the carpus 

 nearly as long as the propodos, with the inferior margin sUghtly 

 produced and tipped with plumose cilia ; propodos half as long 

 again as broad, ovate ; palm concave, the deepest part being near 

 the dactylos, ornately fi-ingcd near the base of the dactylos with 

 simple sharp-pointed perpendicular teeth, then with two or three 

 tubercles crowned with teeth spreading like a fan, and lastly Avith 

 seven or eight long comb-like teeth just within the limits of the 

 produced inferior angle of the ])alm, the la«t of wliirh is double 



