202 Notes on North American Crustacea. 



Cryptopodia g^raiiulata. 



Cryptopodia granulata Gibbes; Proc. Am. Assoc. 1850, p. 173 



and Proc. Elliott Soc. i. 25. (wood-cut.) 



In addition to the locality (Charleston Harb.) mentioned by 

 Gibbes, we have this species from Beaufort, N. C. and from St. 

 Tliomas, W. 1. 



CANCROIDEA. 



Ater^ati§ lobatiis. 



Cancer lohatus M. Edw., Hist. Nat. des Crust, i. 375. (?) 



Our specimen is a small one, the carapax being less than 

 half an inch in length, and not " foftement bossel^e." The 

 aret'Iets of the carapax are granulated, and the ambulatory 

 feet are not altogether smooth, but granulated above on the 

 penult and antepenult joints. In other characters it agrees 

 well with tlie description of Milne Edwards. 



It was found at Aspinwall, by Rev. J. Howell. 



Atcrg'atis roluBidatus, nov. sp. 



Carapax less broad than is usual in the genus, equally convex anteriorly 

 and posteriorly, areolated and granulated. Antero-lateral margin 

 crested, indistinctly quadrilobate, the lobes being separated by very 

 slight notches, not fissures ; — the marginal crest granulated like the rest 

 of the carapax. Postero-lateral side very short. Hand of the chelipeds 

 short, with a high lamelliform superior crest'; outer surface granulated 

 above, and ornamented with four or five granulated costse. Length of 

 the carapax, 0.25 ; breadth, 0.32 inch. 



It differs from A. Umbatus in having a narrower limb or 

 crest of the antero-lateral margin. It is the analogue or represen- 



