of the Pacific Shores of North America. 499 



HIPPOLYTE LAYI. Owen. 



Hippolyte Layi, Owen ; ZoOl. of Beecheifs Voyage, 90, PI. XXVII. f. 3. 

 Brandt; Slbirische Reise, Zodl. i. 117. 



In this and the succeeding species the rostrum is much 

 longer than in any other herein mentioned, often exceeding 

 three fourths that of the thorax. Only two or three of the 

 dorsal teeth belong to the thorax proper, and the posterior 

 one of these is at about the anterior third of its length. 



Hab. Monterey, (Capt. Beechey.) 



Mus. R. C. S ; Zool. Soc. 



HIPPOLYTE SITCHENSIS. Brandt. 

 Hippolyte Sitchensis, Brandt ; Slbirische Reise, Zodl.i. 116, PI. V. f. 18. 



This differs from H. Layi, in having a smaller number of 

 larger and more crowded teeth on the rostrum, but it is 

 probably only a variety. 



Hab. Sitka, (Brandt;) Monterey, (A. S. Taylor.) 



Mus. Acad. Petrop. 



HIPPOLYTE PALPATOR. Owen. 



Hippolyte palpator, Owen; Zodl. of Beechey' s Voyage, 89. PI. XXVII. f. 3- 

 Brandt; Slbirische Reise, Zool. i. 117. Stimpson ; Proc, Cat. Acad. Nat. 

 Sci. i. 89. 



This species may be determined by its rather slender 

 form, small rostrum, and very long outer maxillipeds. The 

 dorsal crest is six-toothed above, the posterior tooth being 

 just in front of the middle of the thorax. The rostrum is 

 very slender, about one fourth as long as the thorax, and 

 tapers to a sharp, sometimes bifid, extremity. 



Hab. Monterey, (Capt. Beechey.) 



Mus. R. C. S. ; Zool. Soc. 



