458 Annals of the South African Museum. 



Locality. Umhlangakulu River, N.W. by N., 7 miles; depth 

 50 fathoms, Natal. A 839. 



TKIBK CATOMETOPA. 



FAMILY GONEPLACIDAK 



GEN. EUCRATE, de Haan, 1835. 



ElJCRATE AFFINIS, Haswell. 



Plate CX. 



This species has recently been discussed in these Annals, vol. 17, 

 p. 238, from a small and very imperfect specimen. The opportunity 

 has now occurred of comparing better and larger specimens, one of 

 each sex, the female having the carapace 15 mm. broad at the third 

 autero-lateral tooth, with a length of 12 mm., the male carapace 

 measuring 11 mm. in breadth with a length slightly over 8 mm. 

 Some interesting differences may be observed between the second 

 maxillae and third maxillipeds of this species and the corresponding 

 parts of Pachygrapsus polyodous. Both the specimens of Eucrate were 

 collected in Durban waters, the male coming from the Durban Museum, 

 the female from the South African. A 3939. 



FAMILY GRAPSIDAE. 



(See these Annals, vol. 6, pt. 4, p. 316, and add 

 1918. Grapsidae, Rathbun, TJ.S. Nat. Mus., Bulletin No. 97, p. 224.) 



GEN. PACHYGRAPSUS, Randall, 1839. 



(See these Annals, vol. 6, p. 319, and add 

 Pachygrapsus, Rathbxin, as above, p. 240.) 



The new species requires a slight modification of the generic 

 account given by Miss Rathbun, as that account admits only a 

 maximum of three antero -lateral teeth on each side of the sub- 

 quadrate carapace, while here there are distinctly four. 



PACHYGRAPSUS POLYODOUS, n. sp. 

 Plate CXI. 



The character just mentioned, though found in other Grapsoid 

 genera, is apparently unique among the known species of Pachy- 



