202 CALIFORNIA ACADEMY OF SCIENCES. 



they live. This species may be distinguished from 

 picta by its larger size, different color, longer and more 

 slender rostrum and the much more slender ambulatory 

 legs. Collection University of California. 



Heptacarpus cristatus (8t,), 



Hippolyte cristata Stimpson, ^roc. Acad. Nat. Sci. Phila., 1860, p. 33. 



KiNGSLEY, Bull. Essex Inst., Vol. X, 1878, p. 62. 

 Spirontocaris cristata Walker, Trans. Liverpool Biol. Soc, Vol. XII, 



1898, p. 277. 



Less robust than Taylori. Kostrum rather narrow, about two-thirds 

 the length of the carapace, arched over the eyes where the teeth are most 

 thickly set, and armed above with 5-8 teeth, the posterior two or three 

 being on the carapace, while the most anterior one is situated some dis- 

 tance behind the tip; lower margin with two or three teeth near the tip. 

 The basal spine of the antennules reaches a little beyond the tip of the 

 first joint. Antennal scale considerably longer than the rostrum and 

 narrower than in palpator or Taylori; flagellum longer than the body. 

 Maxillipeds reaching to or beyond the tip of the acicle; hand of the 

 anterior chelipeds long and narrow. Second pair of chelipeds reaching 

 the tip of the acicle; first joint of the carpus slightly longer than the sec- 

 ond; third about as long as the first two; fourth, fifth and sixth decreasing 

 successively in length; seventh longer than the fourth; hand nearly as 

 long as the last three joints of the carpus. Posterior legs more slender 

 than in palpator, the merus joints armed with spines on the distal portion 

 of the outer surface; dactyls long, slender, evenly tapering, about half the 

 length of the propodi. Abdomen moderate, none of the segments cari- 

 nated above; postero-lateral angles of the fourth segment rounded but gen- 

 erally bearing a minute spine; those of the fifth segment acute and having 

 a larger spine. Telson rounded above and having three pairs of dorsal 

 spinules. 



San Francisco Bay (Stimpson); Monterey! San Diego! 



Easily distinguished from the other species described 

 here by its long, slender dactyls. 



A Heptacarpus carinatus, sp. nov. 



mparison to t 



?.' 



Carapace small in comparison to the abdomen; antennal spine well 

 developed, larger than the spine at the antero-inferior angle. Rostrum 

 rather narrow, evenly tapering, about equalling the carapace in length, 



