igo STALK-EYED CRUSTACEA 



7. Callinectes bellicosus. 



Lupa bcllicosa . . . Stimpson. 



The carapace is smooth and convex. The front has 

 four teeth, the two median being rudimentary, the two 

 lateral being thin and sharp. The sternum is flat, wide, 

 and punctuated. The base of the penultimate joint of the 

 abdomen of the male is wide. The verges reach almost 

 the middle of this joint. 



California. 



8. Callinectes arcuatus. 



The carapace is convex and finely granular ; the 

 antero-lateral borders are semicircular. The sternum is 

 flat. The abdomen of the male is a little wide ; the base 

 of the penultimate joint is not contracted. The verges are 

 long, thin, and straight. 



California, Mexico, Panama. 



9. Callinectes pleuriticus. 



The carapace is convex, and the granulations are 

 small. The frontal teeth are not prominent. The antero- 

 lateral borders are circular, and the teeth are wide. The 

 sternum is wide and flat. The verges resemble those of 

 C. arcuatus. 



Panama. 



10. Callinectes nitidus. 



The carapace is wide, the antero - lateral borders 

 forming a curve with a large radius ; the teeth are wide 

 and strong. The front is slightly advanced ; its median 

 teeth are rudimentary, being separated, the one from the 



