ON THE BRACHYUROUS DECAPODS OF THE CAPE. 



61 



before, and some minute tubercles behind. The margin of the orbit is also tuberculated, four 

 of the tubercles becoming almost teeth. The margin of the two middle lobes of the four-lobed 

 clypeus has six tubercles for each. The fore-feet are one larger than the other. Both are 

 almost smooth, although the smaller presents some vestiges of tubercles. The digits of the 

 chelae are black; those of the larger hand have three teeth above and below; those of the lesser 

 hand being almost without teeth. The feet are without spots or tubercles, but are very hispid. 

 The length is two inches. The abdomen of the female has seven joints. 



The two foregoing species of EripMa both come close to their congeners, the Gegarcinus 

 hirtipes of Lamarck, and the Eriphia IcBvimana of Milne Edwards. But these last species are 

 natives of the Isle of France. 



Sub-genus. Curtonotus, Dehaan. 



Sp. 11. ( ) Curtonotus vestitus, De/iaan. 



Curtonotus vestitus, Faun. Jap. tab. 5. fig. 3. 



This last groupe appears to be the same as that which is named Pseudorhombida by Milne 

 Edwards. 



Fam. PORTUNIDtE, Mihi. 



Sub-genus. Achelous, Dehaan. 



Sp, 12. ( ) Achelous crassimanus, n. s. 



Descr. Achelous testa glabra regionibus distinctis lateribus antice dentatis, clypeo sexdentato, 

 orbitis subtus unidentatis, manibus articulo tertio intus tridentato extus bidentato, quarto 

 supra ad apicem bidentato adque basin unidentato. 



Note. This large crab has a shell which is about five inches long by seven wide. The teeth of 

 the cephalothorax are triangular, sharp, and nearly equal. The fore feet are nearly equal in size. 

 The abdomen of male has seven joints. It has been only known, as yet, to occur in deep 

 holes, which it makes in the mud islands near the mouth of the Zwartkops River, — islands that 

 are only visible at low water. 



Sub-genus. Charybdis, Dehaan. 



Sp. 13. (— ) Charybdis Smithii, n. s. 



Descr. Charyldis testa glabra, regionibus indistinctis, lateribus antic^ sexdentatis, clypeo 

 8-dentato, orbitis baud dentatis, manibus articulo secundo intus tridentato, quarto supra 

 bidentato intus et extus lineis tribus gramdatis longitudinaliter carinato, digitis sulcatis. 



Note. Although I have here placed Charybdis as a sub-genus, I suspect that when the family 

 Portunidce is worked out, it will be found that the Charybdis of Dehaan is only a section of 

 some sub-genus of the genus Portuninus. M. Dehaan is here sphtting very fine ; for between 

 the groupes named by him Oceanus, Charybdis, and Thalamita, the differences are very 

 minute. Our crab comes between Oceanus crucifer of Dehaan and his Charybdis 6-dentatus. 

 The cephalothorax has no transverse granulated lines like the latter, nor are the teeth of the 

 clypeus blunt like those of Oceanus crucifer. The six teeth of the anterior lateral margin are 



