THE SPIDER CRABS OF AMERICA 559 



Measurements. — Male (21973), length of carapace 14.2, width 

 of same 18.2, length of cheliped 37.6 mm. 



Range. — From Magdalena Bay, Lower California, Mexico, to 

 Panama. Depth, 12 to 51 fathoms. 



Material examined. — See table, page 557. 



HETEROCRYPTA LAPIDEA Rathbun 



Heterocrypta lapidea Rathbun. Bull. U. S. Fish Comm., vol. 20, for 1900, 

 pt. 2 (1901), p. 83, text-fig. 13 (type-locality, St. Thomas; holotype, 

 Cat. No. 20324, U.S.N. M.). 



Dm^nosis.— Carapace one and one-eighth times as wide as long, 

 margins dentate or lobate. Postero-lateral margin between branchial 

 ridge and lateral angle concave. Two tubercles on connecting gastric 

 ridge distant. 



Description. — Carapace much narrower than in H. granulata; some 

 of the granules of branchial 

 ridges are thrown up in tu- 

 bercles, one at gastric ter- 

 minus of either ridge; a 

 well-defined angle at other 

 end of branchial ridge ; mar- 

 gin concave between this 

 angle and end of antero- 

 lateral margin. A me- 

 dian furrow across front 

 and anterior gastric region. 

 Front longer, cheliped s fig. 153.— heterockypta lapidea, female (20324), caea- 

 longer and narrower than in '^'^ '' ""• '-°^«' ^°''^*" ^^"^- ^^"''^ Rathbun) 

 H. granulata; margins of arm subparallel; dentation of margins 

 stronger than that of //. granulata. 



Measurements. — Female, holotype, length of carapace 5.9, width of 

 same 6.6, length of outer margin of arm and hand each 4 mm. 



Range. — Porto Rico and St. Thomas. 



Material examined. — 



Mayaguez, Porto Rico; January 20, 1899; Fish Hawk; 1 young 

 (24227). 



St. Thomas; Albatross; 1 female, holotype (20324). 



HETEROCRYPTA OCCroENTALIS (Dana) 



Plates 204 and 205 



Cryptopodia occidentalis Dana, Amer. Journ. Sci., ser. 2, vol. 18, 1854, 

 p. 430, woodcut (type-locality, Monterey; type probably in Yale Uni- 

 versity Museum.*" — Stimpson, Boston Journ. Nat. Hist., vol. 4, 1857, 

 p. 458. — A. Milne Edwards, Crust. Rdg. Mex., 1878, p. 169. 



M It is not possible at this time to verify the existence of the type, as it is perhaps among large collections 

 now in storage. 



