136 ATYPOPENEUS DEARMATUS. 



(Hend.). Rostrum ascending, as long as the l«t joint of 

 the antennular peduncle, 6+1 oi* 5+1 toothed, epigas- 

 tric tooth at the anterior third of the carapace. No post- 

 rostral carina. Post-antennular spine small and postanten- 

 nular sulcus wanting as in Atyp. compressipes. No hepatic 

 spine. First three abdominal terga rounded, A^^ — 6^^ carinate. 



Antennulae and antennae as in Atyp. compressipes, but 

 the lower antennular flagellum finely serrate on its distal 

 half in the male. External maxillipedes and legs as in 

 Atyp. compressipes, but the S""*! legs are distinctly longer 

 than the 2°^. First and second legs bispinose, third legs 

 unispinose. 



Petasraa symmetrical, anterior fourth of the stem some- 

 what narrowing and ending in a pair of short horns, 

 which stand out at right angles to the rest of the organ 

 and each of which termioates in two small teeth or hooks, 

 that are slightly recurved. 



Thelycum consisting of a narrow, cyathiform plate be- 

 tween the coxae of the 5tli legs, broader anteriorly than 

 posteriorly, with raised lateral margins, which are separated 

 by narrow grooves from the surface of the organ, that is 

 continued anteriorly in a flattened triangular tooth, situated 

 between the coxae of the 4*^ legs. 



Length of male 47™™-, of female 72ram.. 



11. Solenocera Faxoni, n. sp. 



Station 254. Lat. 5°40' S. ; long. 132°26'E. Depth 

 310 M. 



Rostrum acute, short, not quite reaching to the end of 

 the eyes ; upper margin directed somewhat downward, 

 armed with 6 teeth, 3 of which are on the carapace. 



Rostral crest reaching only to the cervical groove, pos- 

 terior to it the carapace is rounded. No tooth at orbital 

 angle. Post-antennular spine and hepatic spine small, post- 

 orbital spine a little larger; a strong, acute, flattened, 

 branchiostegal spine or tooth at the extremity of the sub- 

 Notes from the Leyden Miuseum, ~Vol. XXIX. 



