40.2 * CRUSTACEA. 



numerous specimens in the collection, and Colonel Sabine 

 states that " several were brought up in the same drag-net, 

 from fifty fathoms on the coast of Melville Island." 



HIPPOLYTE BELCHERI (n. s.). 



PLATE XXXIV., fig. 1. 



Thorace subcylindraceo, hand gibboso, rostro recto, abdominis seg- 

 mento tertio spina uncinata forti aiinato. 



In this new species, the body is slender and smooth; the cara- 

 pace nearly cylindrical, with a single tooth at the outside of the 

 orbilar notch, slightly carinated on the anterior half, but not 

 gibbous, the carina with two small teeth ; the rostrum straight, 

 narrow, with three very small teeth above and two beneath, in 

 the single specimen observed ; the outer filament of the su- 

 perior antenna thickened near the base, and gradually taper- 

 ing to the extremity. The abdomen is strongly bent at the 

 third segment, which is armed, near the posterior margin, 

 with a strong hooked spine, curved backwards ; the fifth and 

 sixth segments with a small triangular spine at the anterior 

 angle ; the seventh (middle lamina of the tail) , with five pairs 

 of minute spines above. Antennae, legs, and pedipalps very 

 slender; first pair of abdominal false feet as large as the 

 others. 



Length from rostrum to tail, 1'8 inch. 



This species has the strong hooked spine which is charac- 

 teristic of H. Soiverbcei, but it differs widely from it in its 

 general character. It belongs, in fact, with that exception, 

 to the more smooth and slender section of the genus. 



A single specimen only was found in the collection, without 

 any particular locality being designated. 



CRANGON BOREAS (Auct.). 



Cancer boreas, Pliipps' Voy., App. 190. t. 12. f. 1. 

 Crangon boreas, Sab., Parry's Voy. ccxxxv. ; Edw., Hist. Nat. des 

 Crust, ii. p. 342. 



Two specimens were obtained, one of which was a remark- 

 ably large one. 



