252 BULLETIN OF THE 



Length of body (without rostrum) 12 mm. 



" rostrum 4 " 



legs 64 " 



SPECIMENS EXAMINED. 



Stat. Locality. Depth. No. and Sex. 



317 N. Lat. 31° 57', W. Long. 78° 18' 35" 333 fathoms. 2 cf aud ? 



319 " 32° 25', " 77° 42' 30" 262 " 1 cf 



Pallenopsis longirostris, sp. nov. 



Plates IT. and V. 



I have received from Professor Verrill a second species of this curious genua 

 from the deep-water dredgings of the Fish Commission, which may be advan- 

 tageously described in connection with the last. Body somewhat more robust 

 than in the last. Oculiferous segment longer than the two following taken to- 

 gether, much swollen in front, so that there appears to be a distinct neck, which 

 is, however, scarcely narrower than the rest of the body. Oculiferous tubercle 

 obtuse, much less prominent than in the last ; ocelli nearly the same, lighter 

 colored. 



Rostrum as long as the oculiferous and two succeeding segments taken to- 

 gether, somewhat fusiform, slightly swollen a little behind the middle, expand- 

 ing very slightly near the tip. 



" Antennae" (Fig. 21) extremely slender ; the two basal joints barely extend 

 beyond the tip of the rostrum. Chela; rather slender, scarcely swollen ; claws 

 much longer and more slender than in the preceding form, and decidedly 

 curved towards their tips. Along the middle part of their cutting edges they 

 are finely but very irregularly serrate. 



Palpi in the male nearly as in the preceding species ; in the female, still 

 smaller and more rudimentary. 



Accessory legs (Fig. 25) much as in the last species, much smaller and less 

 spinose in the female. In tlie male the sixth joint is sub-globose at its distal 

 extremity, where it is surrounded by a tolerably definite circlet of very strong 

 taperjng, acute, backward-pointing spines or hooks, by means of which the egg- 

 mass is securely held. 



Legs more slender than in the former species. Tarsus usually with a larger 

 spine at the lower distal angle. Spines of the propodus far less numerous than 

 in the last ; there are usually three larger ones on the basal half of the joint, 

 followed after a naked space by three; or four shorter ones, and these by a jjair 

 of divergent slender longer spines. Dnctylus about one hall' llie propodus. 



Surface everywhere finely tuberculose. Hairs absent from body, and less 

 numerous on legs than in the last. On the legs (as in the preceding species) 

 the hairs are longer and more slender on the upper side. They have on the 

 outer joints a very peculiar structure; along their outer margins are a number 

 of more or le.''8 prominent barbs pointing towards the tip of the spine. 



