98 STALK-EYED CRUSTACEA 



15. Mithrax (Mithrax) ruber. 



Mithrax ruber . . . Miers. 



MitJiraaihis ruber . . A. Milne Edwards, Stimpson. 



The carapace is subtriangular, about one-fifth wider 

 than long. The surface is naked, with few protuberances. 

 These projections are rounded and not elongated, and 

 some have scattered tubercles. The antero-lateral border 

 has three teeth, independent of the orbital angle. The 

 last tooth is sharp, spiniform, and curved forwards ; the 

 other two are tubercular. The middle tooth is composed 

 of two tubercles, and there is a small tubercle between 

 it and the last tooth. The postero-lateral border has a 

 small sharp tubercle situated behind the last tooth. The 

 external maxillipede has its fourth joint slightly sinuous 

 in front, showing an indication of a slight notch. The 

 first pair of legs is long and thin. The arm has six small 

 tubercles, conical and of equal size ; the forearm and hand 

 are smooth. The walking legs are cylindrical, and have 

 above short hairs ; they are spinous above, the spines 

 being arranged in two series. 



The colour of the carapace is chestnut brown, bluish 

 behind. 



Range. — Cuba. 



16. Mithrax (Mithrax) coronatus. 



Mithrax coro7iatus . . Miers. 



Mithraculus corojmtus . A. Milne Edwards, Stimpson, 



White, S. Smith. 

 Mithrax sculptus . . Desbonne and Schramm. 

 Cancer coronatus . . . Herbs t. 



The carapace is about one-third wider than long, and 

 strongly curved in front as well as behind. The furrows 



