220 CALIFORNIA ACADEMY OF SCIENCES. 



with movable tips, and one to four intermediate denticles between the 

 submedian and intermediate spines. The dactyl of the large chelipeds is 

 not strongly dilated at the base and has few or no marginal spines. 



Pseudosquilla Lessonii (Guerin). 



Squilla Cerisii Guerin, Voy. Coquille, Crust., 1830, p. 40 {S. Lessonii on 



plate) . 

 Squilla spinifrons Owen, Proc. Zool. Soc. London, 1832, p. 6. 

 Squilla Lessonii Milne-Edwards, Hist. Nat. Crust., Tome II, 1837, p. 527. 



White, List. Crust. Brit. Mus., 1847, p. 84. 

 Squilla monoceros Milne-Edwards, Hist. Nat. Crust., Tome II, 1837, p. 



526. NicoLET in Gay's Hist. Chile, III, Crust., 1849, p. 224. 

 Pseudosquilla Lessonii Dana, Crust. U. S. Expl. Epd., Part 1, 1852, p. 



662. Miers, Ann. Nat. Hist. (5), Vol. Y, 1880, p. 113. Bigelow, 



Proc. U. S. Nat. Mus., Vol. XVII, 1894, p. 502. 

 Pseudosquilla marmorata Lockington, Proc. Cal. Acad. Sci., Vol. VII, 



1877, p. 33. 



Rostrum with acute outer angles and a long, median spine. Hand with 

 three marginal spines; finger with two spines near the base. Sixth abdom- 

 inal segment with four longitudinal carinae which end posteriorly in spines. 

 Telson with a median carina which ends posteriorly in a spine and five 

 smaller cariuse on either side; the posterior margin has three large spines on 

 either side of the triangular, median notch; two spinules between the sub- 

 median spines and the next large spine in front; a single spinule between 

 the following pair of large spines. Basal prolongation of the uropod end- 

 ing in one large spine with two spines on its inner margin; outer margin 

 of the outer ramus of the uropods armed with spines which increase in 

 size posteriorly, the last spine much exceeding the preceding ones. 



Chili, S. lat. 00° 46'; W. Ion. 89° 42"; Wilmington, 

 Calif. (Bigelow); Lower California; San Diego (Lock- 

 ington)! Santa Catalina Island! 



Pseudosquilla stylifera (M.-Ediv.). 



Gonodactylus styliferus Milne-Edwards, Hist. Nat. Crust., Tome II, 1837, 

 p. 530. Nicolet iu Gay's Hist. Chile, III, Crust., 1849, p. 225. 



Pseudosquilla stylifera Miers, Ann. Nat. Hist. (5), Vol. V, 1880, p. 112. 

 Bigelow, Proc. U. S. Nat. Mus., Vol. XVII, 1894, p. 502, fig. 3. 



Rostrum longer than broad, acute, but not ending in a spine. Dactyl 

 of the large chelipeds devoid of spines. Sixth abdominal segment longi- 

 tudinally carinated. Telson with a median carina and a lateral one on 



