84 



NOTICES OF NEW SPECIES OF CRUSTACEA OF WESTERN NORTH 

 AMERICA ; BEING AN ABSTRACT FROM A PAPER TO BE PUB- 

 LISHED IN THE JOURNAL OF THE SOCIETY. BY WILLIAM 

 STIMPSON. 



Chioncecetes Behringianus. Carapax rugose, with the 

 prominences blunt and wart-hke about the middle, but becoming 

 shai'per anteriorly and at the sides ; the surface somewhat scab- 

 rous and pubescent. Channels above the postero-lateral margins 

 broad and nearly smooth. Feet everywhere slightly pubescent ; 

 the third articles scabrous above. Those of the first pair muri- 

 cate along the angles. Abdomen in the male 7-articulate, one 

 third the width of the sternal plastron ; basal articles strongly 

 granulated ; infero-lateral angles of the penultimate article some- 

 what produced and tumid. It differs from C. opilio, Kr., in the 

 proportionally shorter feet of the male. Dredged off Cape 

 Romanzoff by the North Pacific Expedition. 



Loxorynchus, (nov. gen.) Carapax pyriform, pubescent, 

 spinous ; stomachal region very full ; hepatic regions small but 

 prominent, with a principal spine at the middle. Rostrum bifid, 

 more or less deflexed. Pr^eorbital tooth sufficiently prominent. 

 Orbits interrupted by a deep longitudinal sinus above and below, 

 exposing the eyes ; post-orbital spine between these fissures acute ; 

 a suborbital spine always present beneath the post-orbital. Basal 

 article of external antennae almost as broad as long, with a sharp 

 spine at its external apex ; — this spine, as well as the movable 

 part of the antenna, is not quite concealed beneath the rostrum, 

 but may be seen from above. Pincers in both male and female 

 with their inner denticulated edges touching each other through- 

 out their length. Feet of the second pair slightly longer than 

 the others. Abdomen of the female seven-articulate. 



It differs from Pisa in its incomplete orbits, and broader basal 

 article of the external antennae ; from Ghorinus in the non- 

 concealment of these antenna; ; from Pericera in its movable 

 eye-peduncles; — and though resembling these genera in general 

 form, it differs from all in the deflection of the rostrum. The 

 greater size of the rostrum, and less exposure of the antennaj, 

 distinguish it from Perinea, Dana. 



