STALK-EVED CRUSTACEA 187 



joint has a spine on its external border. The hand has a 

 strong spine upon its outer margin near its articulation 

 with the fifth joint, and a small spine near the base of the 

 movable finger. The verges of the male may be long or 

 short, straight or curved. They are in the form of 

 rounded threads. 



Range. — British Guiana, French Guiana, Brazil, 

 Chili, Colombia, Panama, Guatemala, Mexico, Vera 

 Cruz, Bahamas, Hayti, Florida, California. 



According to A. Milne Edwards, the species de- 

 scribed as distinct from Ca/linectes diacantlnis by Ordway 

 are only varieties of the latter. I enumerate Ordway's 

 species : — 



I. Callinectes hastatus. 



Callificctes sapidus . . Rathbun. 



The carapace is about twice as wide as long. The 

 anterior portion is ornamented with large and regularly 

 placed granulations ; upon the cardiac and branchial 

 regions these granulations are smaller and less numerous. 

 The regions are distinctly marked. The front is formed 

 of two triangular teeth, the median teeth which usually 

 exist having disappeared. The supero-internal orbital 

 angles are truncated and squarely cut. The suborbital 

 angle is a little advanced and subspiniform. The ptery- 

 gostomian regions are very hairy behind, but naked in 

 front. The antero-lateral teeth are conical and pointed ; 

 the lateral horn is long and strong. The fourth joint of 

 first pair of legs has three large spines in front, and a 

 small spine at the extremity of its posterior border. The 

 hand is armed with a strong spine above its articulation 

 with the fifth joint, and an obtuse spine above its articu- 

 lation with the movable finger. 



