Genus Callinccics. 573 



Bryant ; and Tortugas, Dr. Holder. It has also been found 

 in Charleston Harbor, by Prof. Agassiz. It is about two 

 thirds the size of haslatus. 



CALLINECTES LARVATUS, iiov. sp. 



Carapax quite narrow, strongly convex, and verj^ uneven 

 — the areolations being very strongly marked. It is gran- 

 ulated in the same way as ornatus, though rather more 

 coarsely. The teeth of the front resemble those of ornatus, 

 but are more developed and obtuse. Sub-median tooth of 

 front long and narrow. The teeth of the antero-lateral 

 border are long, quite obtuse, separated from each other at 

 their base, and even curved slightly forward. Interior 

 angle of the lower margin of the orbit prolonged upwards 

 into a very prominent tooth, as large as those of the lat- 

 eral border and very obtuse. Pterygostomian region pube- 

 scent. Sternum quite narrow, and slightly convex. Ab- 

 domen of the male very similar to that of ornatus, but the 

 intromittent organs are very different, being very short 

 and curved, scarcely reaching beyond the base of the penult 

 segment of the abdomen. The abdomen of the female 

 is rather narrow. Chelipeds slightly longer than in ornatus. 

 Manus with the costae very prominent. Carpus quite 

 rough, with three distinct ridges, and scattered granula- 

 tions ; armed with one spine, and with the rudiments of 

 two others generally distinctly visible and even sometimes 

 developed. Meros and manus with the same number of 

 spines as in ornatus. The lamelliform projection of the 

 trochanter is broad and square. 



This species is most nearly allied to ornatus, but can 

 easily be distinguished from it. The striking differences 

 in the intromittent organ and carapax are fully sufficient 

 to enable us to recognize it. 



One specimen of this species has five spines on the me- 

 ros joint of one chcliped, and two others have four. 



