60 Crustacea and Echinodermata of the 



HIPPOLYTE BREVIROSTRIS. Dana. 



Hippolvtc brevirostris, Dana': U. S. Exploring Expedition, Crust, i. 566. PI. 

 XXXVI. f. 5. Stimpson; Proc. Cal. Acad. Nat. Sri. i. 89. 



Some individuals of this species approach so closely to 

 H. palpator, that I am half inclined to consider it as a 

 variety. Both are characterized by having greatly elongated 

 outer maxillipeds, two subocular teeth on the margin of 

 the carapax, and large thoracic dorsal teeth, the posterior 

 one near the middle of the thorax. H. brevirostris is ap- 

 parently a more robust species ; the rostrum is generally 

 shorter, and has fewer teeth ; and the shield of the second 

 abdominal segment is much larger than that of H. palpator 

 as figured by Owen. The slender flagellum of the internal 

 antennae is generally scarcely longer than the stout one. 

 Posterior feet moderately spinulose. Basal joints of outer 

 maxillipeds with serrated margins. Color, uniform light 

 crimson or scarlet. 



Hab. Straits of De Fuca, (Expl. Exped. ;) San Francisco 

 Bay, (W. S.) 



Mas. Expl. Exped. ; Phil. Acad. ; Smithsonian. 



HIPPOLYTE TAYLOBI. Stimpson, n. S. 



In this species the rostrum is exceedingly short, consisting 

 only of the small terminal tooth of the dorsal crest, and 

 projecting scarcely beyond the anterior margin of the thorax. 

 This dorsal crest is serrated with six teeth, including the 

 terminal one. The posterior tooth is at the middle of the 

 thorax ; and the second and third (from the front) are rather 

 above than behind the first, which is much the smallest. 

 There is a single sharp spine beneath the eye, but hardly a 

 vestige of another beneath this. The feet of the first pair 

 are very stout; those of the second pair reach the tips of 

 the maxillipeds. This species is more slender than the 



