9 



1879.] NATURAL SCIENCES OP PHILADELPHIA. 389 



Other localities are Tortugas and Aspinwall, Abrolhos, Brazil 

 (Smith), St. Thomas and Guadeloupe (A. M. Edw.). 



Mithraculus sculptus Stm. 



Maia sculpta Lamarck, An. sans Vertebres, v. p. 242. 



Mithrax sculptus Edw., Mag. de Zool., 1832, pi. v.; Hist. Crust, i. 



p. 322. 

 Mithraculus sculptus Stm., Am. Jour. II., xxix. p. 132. A. M. Edw., 



Crust. Mex. et Am. Cent,, p. 105, pi. xx. f. 2. 



Specimens were collected at Key West. I have seen others 

 from the same locality collected by Dr. Packard, and from Tor- 

 tugas (Lieut. Jacques). It has been reported from Antilles (Edw.), 

 Cuba, Surinam, and Venezuela (Martens), Guadeloupe, St. Thomas, 

 Martinique, Woman Key, Fla., and Cumana (A. Edw.). 



Mithraculus cinctimanuS Stm. 



Mithraculus cinctimanus Stm., Am. Jour. Sci. and Arts. II., xxix. 

 p. 132 (sine descr.); Ann. Lye, vii. p. 186. A. M. Edw., Crust. 

 Mex. et Am. Cent., p. 112, pi. xxiii. f. 3 % 



The twelve specimens of this species that I have examined agree 

 well with Stimpson's description, except in the coloration of the 

 hands. In these specimens (alcoholic), the hands are white with 

 the basal two-thirds darker; there is also a band of darker on the 

 fingers. Prof. Webster collected specimens at Plantation and 

 Harbor Keys. In the Peabody Academy are specimens from 

 Key West (Packard). Other localities are Tortugas (Stm.), St. 

 Thomas (Stm., A. Edw.), Guadeloupe (A. M. Edw.). 



Mithraculus hirsutipes Kiugsley. PI. xiv. f. 1. 



Mithraculus hirsutipes Kingsley, Proc. Bost. Soc'y, xx. 147. 

 Two males were collected at Sarasota Bay, which agree well 

 with my types, except in the comparatively narrower carapax. 



Length of Carapax. Breadth. Ratio. 



11mm. 11.8 mm. 100:107 



9 mm. 9.6 mm. 100 : 107 



There were two young specimens collected at Sarasota Bay, 

 which maj' be the 3 T oung of either of the last two species. They 

 differ, however, from cinctimanus in the absence of the large tooth 

 at the base of the dactyli of the cheliped, and in having the ridge 

 running backward from the palatal region broken; from hirsutipes 

 in the smoother carapax, more prominent frontal horns, and in 

 having the antennal spines as in cinctimanus, etc. 



