STALK-EYED CRUSTACEA 189 



oj'natus. The verges are very short and curved ; they do 

 not reach the penultimate joint of the abdomen. 

 Florida, Bahamas, Hayti, Mexico, Vera Cruz. 



4. Callinectes tumidus. 



The antero-lateral borders are much more bowed 

 than in any of the preceding varieties, and orna- 

 mented with wide and large teeth, directed a little 

 forwards, and with convex sides. The lateral horns are 

 short. The front has four teeth. The penultimate joint 

 of the abdomen of the male is short. The verges, which 

 reach the middle of this joint, are curved, and terminate in 

 a very distinct hook. 



Florida, Hayti, Jamaica, Brazil. 



5. Callinectes toxotes. 



The carapace is wide and very convex ; it is covered 

 with scattered granulations. The regions are marked ; a 

 median groove divides the cardiac region into two lobes. 

 The median region is long and narrow. The front has 

 four obtuse and subequal teeth. The sternum is flat; the 

 abdomen of the male is very wide ; the verges are very 

 long, reach the end of the abdomen and are curved, their 

 extremity forming almost a circle. 



California, Mexico, Ecuador. 



6. Callinectes robustus. 



Resembles the preceding, but the frontal teeth are 

 of unequal size, the median being smaller than the 

 lateral. 



Colombia. 



