1819.] NATURAL SCIENCES OF PHILADELPHIA. 391 



Cuba (von Martens), Vera Cruz (A. M. Edw.), Guadeloupe (Des- 

 bonne and A. M. Edw.). 



M. Alphonse Milne Edwards considers this the same as the 

 Lambrus serratm described by H. Milne Edwards, and the de- 

 scription applies well to the specimen now before me. Milne 

 Edwards, Sr., gives the Indian Ocean as the habitat of L. serratus, 

 and Adams and White (Voyage of the Samarang, Crustacea, p. 

 30, 1841) report it from the Philippine Islands. 



Sub-Family Cryptopodiinae. 



Genus HETEROCRYPTA Stm. 

 Heterocrypta granulata Stm. 



Cryptopodia granulata Gibbes, Proc. Am. Assoc, iii. p. 173 ; Proc. 



Elliot Soc'y, i. p. 36 (fig.). 

 Heterocrypta granulata Stm., Ann. Lye, x. p. 102. A. M. Edw., Crust. 



Mex. et Am. Cent., p. 186, pi. xxix. f. 4. 



Specimens were collected at Northampton Co., Va. ; near Piver's 

 Island, Beaufort, N. C, Florida Bay, and Sarasota Bay. Fort 

 Macon! (Packard), Charleston, S. C. (Gibbes), St. Thomas (Stm., 

 A. M. Edw.). 



CANCROIDEA. 



Family CANCRID^S. 

 Sub-Family Cancrinae. 



Genus CANCER Leach (restr). 

 Cancer irroratus Say. 



Cancer irroratus Say, 1. c, i. p. 59 (pars), pi. iv. f. 2. 

 Platycarcinus irroratus Edw., Hist. Crust., i. p. 414. 

 Cancer sayi Gould, Invert. Mass., p. 323. 

 Platycarcinus sayi Dekay, N. Y. Fauna Crust., p. 7. 

 Platycarcinus irroratus Dekay, op. cit. , pi. ii. f. 2. 

 Cancer borealis Packard, Memoirs Bost. Soc'y, i. p. 303. 



A young specimen was taken at Northampton Co., Va. It was 

 rather more advanced than the form described by Prof. Smith 

 (Fish Coram., p. 533); the length was 5 mm., breadth 6 mm.; the 

 front is more produced, and the teeth of the anterolateral margin 

 are more irregular than in the adult, but not to such an extent as 

 in the younger form. I have not thought it worth while to enume- 

 rate all the reported localities for this species. I have examined 

 specimens from Labrador (Packard), Eastport, Me. (Hyatt), 



