70 RATHBUN 



considerably in front of the middle of the carapace (exclusive of ros- 

 trum) ; in ^S". bisphiosa they begin at or a httle posterior to the middle. 



Rostrum shorter; the upper and lower 

 laminse are narrower and extend nearer 

 the tip; there are 9 to 14 superior teeth 

 ^ . ! "y^""^ t (in S. bispinosa 10 to 12), of which two 



Fig. 25. Spironiocans sica. bide 01 cara- \ -* " 



pace of ¥ (X li)- Station 3200. ^st ou the carapacc ; 3 to 5 inferior teeth 



on the lamina (the same in S. bispinosa)^ but none on the slender termi- 

 nal portion. 



The second segment of the antennular peduncle is longer than in S. 

 bispi?wsa, being three times as long as the third segment, while in S. 

 bispinosa it is twice as long. The outer maxillipeds are longer, reaching 

 beyond the antennal scale ; in S. bispinosa they do not reach the end of 

 the scale. The thoracic feet are longer and slenderer, the first pair over- 

 reaching the antennular peduncle ; in S. bispinosa they fall short of the 

 peduncle. The last pair exceed the antennal scale by the length of 

 the dactylus and one half the propodus; in S. bispinosa, by the length 

 of the dactylus only. 



Dimensions.— ? , length 58 mm., length of carapace and rostrum 24,8 

 mm., of rostrum 12.8 mm. 



Type locality. — Santa Barbara Channel, California, 265 fathoms 

 [Albatross station 3200). 



Distribution.— O^ the coast of California, from Point Arena to San 

 Diego, in 211-464 fathoms, at 19 stations of the Albatross. 



SPIRONTOCARIS PHIPPSII (Kroyer). 



Hippolyte Phippsii Krover, Naturh. Tidssk., Ill, 575, 1841(5 ); K. Danske 

 Vidensk. Selsk. Afhand., ix, 314, pi. Ill, figs. 64-68, 1842 ( 3 )• 



Hippolyte tiirgida Kroyer, Naturh. Tidssk., Ill, 575, 1841 ( ? ); K. Danske 

 Vidensk. Selsk. Afhand., IX, 308, pi. II, figs. 57, 58, and pi. Ill, figs. 

 59-63, 1842 ( ? ). 



Hippolyte vibrans StimpsON, Ann. Lye. Nat. Hist. N. Y., X, 125, 1871 ( $, ). 



i^^?;/a/^.— Posterior spine of dorsal crest at about the middle of the 

 carapace ; 7 to 1 2 dorsal spines, which diminish on the rostrum ; 3 or 4 

 on carapace. Midrib of rostrum slightly inclined upward, neariy straight ; 

 upper limb diminishing gradually in depth toward the tip ; lower limb 

 deeper than the upper, triangular, 4 to 7 spines on distal half ; tip acute, 

 reaching a little beyond the peduncle of the antennula. On the anterior 

 portion of the carapace are 2 supraorbital spines, one above and a 

 litde behind the other, the lower smaller ; an antennal spine ; and a well- 

 developed pterygostomian spine. 



The antennular scale reaches the end, or nearly the end, of the second 



