REPORT OX THE BRACHYURA. 259 



belongs properly to the latter of the two species, not only by 

 the law of elimination but for the reason that Herbst figured 

 a specimen of this species, as denoted by the granulated cara- 

 pace and somewhat appressed teeth. His description too is 

 more applicable to this species: although founded on both. 

 for he says that the teeth are sometimes sharply pointed, 

 sometimes more rounded. The types of Cancer mirabilis 

 were assumed by Gerstaecker in 1856 to be all the same spe- 

 cies, of which O. sexdentata Bell and O. quinquedentata Bell 

 were supposed to be synonyms. 



40. Mithrax (Nemausa) acuticornis [Stimpson) t =Xe- 



mausa rostrata A. Milne Edwards ; types examined). 

 Station 24. off Key West. 60 fathoms: off Hayana. 



41. Mithrax spinosissimus {Lamarck). 



Bahama Banks. 



42. Mithrax verrucosus Milne Edwards, variety 1 =M. 



aculeatl's Rathbun not Herbst nor Milne Edwards). 



Dry Tortugas. 



43. Mithrax hispidus ( Herbst). 



Stations 44. 45 and 46, off Key West, shallow water: Tor- 

 tugas. 



44. Mithrax hoederi Stimpson. Bull. Mus. Comp. Zool.. 



11. 117, 1S71. PI. in. Fig. 2. 



Tortugas; 7 fathoms. 



The specimens of this species known to Stimpson are not ex- 

 tant. I refer to it a single ovigerous female taken off Hayana. 



Carapace oblong, covered with unequal, prominent tuber- 

 cles, and with large crowded punctae. Frontal horns depressed, 

 short, acute, nearly horizontal. Basal antennal joint with 

 three spines, the antero-external long, nearly as adyanced as 

 the rostrum, and directed obliquely upward and outward; pos- 

 terior spine small; a third spine or sharp tooth is at the base 

 of the flagellum. Orbital teeth and spines five, exclusive of 

 the antennal; praeorbital longest and curved inward. Antero- 



IV— 3 Y 2 



