122 Notes on North American Crv.stacea, 



considerable mimber of specimens was found at the Tortugas 

 by Dr. Whitehnrst. 



It cannot be mistaken for an}* of tlie Thalassinidea found on 

 oui- coast, nnless it be a species described b^^ Prof. Lewis R, 

 Gibbes under the name of Callianassa grandimana^ in tlie 

 Proceedings of the Charleston meeting of the American Asso- 

 ciation for the Advancement of Science, in 1850. If the de- 

 scription given by that author is correct, however, our species 

 differs from that named by him in liaving the palm of the hand 

 less than twice as long as the carpus, and in liaving a granu- 

 lated area on the outer surface of this palm ; as well as in the 

 armature of the lower edge of the greater cheliped. 



CalSieMrMs. 



CallicJiirus Stimpson, Proc. Chicago Acad, of Sciences, I, 47. 



Flagella of antennulfe rather shorter than their peduncles. Exter- 

 nal maxillipeds soft, coriaceous ; meros and ischixim compi'essed 

 and dilated ; meros short ; carpus and })ropodus ranch dilated 

 at the inner margins ; propodus larger and more dilated than 

 the carpus, and with a groove in its anterior margin, into which the 

 small, curved dactylus folds. Inner lobes and lacinise of the second 

 pair of maxillse for the most part narrow. Mandibles veiy small and 

 weak, not indurated ; internal basal projection only slightly devel- 

 oped. Carpus and hand of the greater cheliped very long. The ap- 

 pendages to the first and sbcond joints of the abdomen in the male 

 are small ; those of the first pair having but one branch, while those 

 of the second pair have two branches, the outer branch being minute. 

 Caudal lamellje much thickened. Inner lamellae of the appendages to 

 the penult joint of the abdomen very narrow, almost styliform. Ter- 

 minal joint of the abdomen short and broad, contracted at the base, 

 and emarginated at the extremity. 



The type of tliis genus is the Callimiassa major of Say (Jour. 

 Acad. Nat. Sci., Philad., I, p. 238). This species is found 

 abundantly on the sandy shores of the Southern States — North 



