i88 STALK-EYED CRUSTACEA 



The abdomen of the male is very wide ; its last joint 

 is wide and triangular ; the joint behind it is contracted 

 near its base, and the lateral edges are concave. The 

 verges are very long, and almost reach the extremity 

 of the abdomen. They are twice curved. In young 

 specimens the verges are very short, they do not exceed 

 two-thirds of the length of the abdomen ; the last joint but 

 one of the abdomen is not concave laterally. 



Brazil, Chesapeake, Texas, Jamaica, Bermuda. 



2. Callinectes ornatus. 



Smaller than the last. The carapace is not so wide as 

 in C. Jiastatus. The granulations are smaller and more 

 numerous. The front has four teeth, the two external are 

 triangular, the two median are almost rudimentary ; the 

 internal suborbital angles are truncated. The lateral horn 

 is shorter. The abdomen of the male is narrow ; the sides 

 of the last joint but one are regularly concave, the next 

 joint is narrow. The verges are straight and short, they 

 reach only the penultimate joint of the abdomen. 



Bahamas, Brazil, South Carolina, Florida, Hayti, Ber- 

 muda, Jamaica, St. Thomas, Colombia, Venezuela. 



3. Callinectes larvatus. 



The carapace is very straight, strongly convex, and 

 very uneven ; the regions are marked. The frontal teeth 

 resemble those of C. ornatus, but they are obtuse and 

 more developed. The inferior and internal angle of the 

 orbit is prolonged into a very prominent tooth, rounded 

 at its extremity, and as large as those of the anterolateral 

 border; these last are large, obtuse, and slightly curved 

 forwards. The abdomen of the male resembles that of C\ 



