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200 . CALIFORNIA ACADEMY OF SCIENCES. 



San Francisco Bay! Pescadero! Monterey! Magdalena 

 Bay, Lower California (Lockington). 



Although this species is very close to brevirostris , a 

 comparison of several specimens of both species from 

 different localities shows that they are distinct. Taylori 

 is more southern in its range than brevirostris, but both 

 species occur together in San Francisco Bay. 



Heptacarpus pictus (St.). 



Hippolyte picta Stimpson, Ann. N. Y. Lye. Nat. Hist., Vol. X, 1873, p. 

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



A small species, less robust than brevirostris or Taylori. Eostrum 

 slender, straight, horizontal or slightly upturned and about two-thirds the 

 length of the carapace; upper margin with six or seven quite evenly spaced 

 teeth, the last two of which are on the carapace; lower margin with two to 

 four teeth near the tip. The tip of the peduncle of the antennules reaches 

 the middle of the antennal acicle but not the tip of the rostrum; the outer 

 basal scale of the antennules reaches beyond the first joint of the ped- 

 uncle but scarcely reaches the tip of the second joint; no spines on the 

 distal margin of the first basal joint except the one at the external angle; 

 no spine above the base of the slender flagellum; outer flagellum reaching 

 a short distance beyond the tip of the antennal scale; inner flagellum 

 about one-half longer than the outer. The antennae may exceed the length 

 of the body; acicle oblong, slightly tapering, and generally exceeding the 

 tip of the rostrum. Maxillipeds shorter and more slender than in palpa- 

 tory but reaching beyond the tip of the rostrum even in quite small speci- 

 mens; last joint in adults about four times the length of the preceding 

 one. Anterior chelipeds not reaching the tip of the antennal scale. The 

 first and second joints of the carpus of the second pair are subequal; 

 third joint about equal to the first two combined; fourth joint subequal to 

 (or somewhat shorter than) the third, longer than the fifth, which exceeds 

 the sixth; seventh joint considerably longer than the sixth; hand shorter 

 than the last three joints of the carpus. Posterior legs moderately stout; 

 the distal portion of the outer surface of the merus joints armed with a 

 row of spines, which in the first pair often extends more than half way to 

 the base; dactyls short, stout, about one-fourth the length of the propodi, 

 and armed below with spines, the largest of which are near the tip. None 

 of the abdominal segments are carinated above; postero-lateral angle of 

 the fourth abdominal segment obtuse but having a small tooth; that of the 

 fifth segment acute and produced into a spine. Telson rounded above and 



