OCYPODE AFRICAN A DE MAN. 157 



gins in the African species. — The antero-lateral margins 

 are provided with small tubercles in Ocyp. Kuhlii, that 

 are not seen in the other. The infra-orbital margin has a 

 somewhat different course in both species, and the internal 

 infra-orbital angle is provided with two or three small 

 tubercles in Ocyp. Kuhlii, but not in Ocyp. africana. — 

 The two granulated ridges of the first segment of the 

 male sternum of Kuhlii are rather absent in the West- 

 african species. The lateral regions of the upper surface 

 of the carapace are somewhat more coarsely granulated in 

 Ocyp. Kuhlii., than in the other form. The larger hand of 

 the male is more elongate in Kuhlii , than in africana , 

 like also the fingers : the musical ridge is composed out 

 of some few (8 or 10) small ovo'id tubercles, arranged lon- 

 gitudinally, in the Indian form, but in Ocyp. africana it 

 consists out of delicate transverse lines that become gra- 

 dually narrower towards the upper part of the ridge, but 

 do not change into tubercules. The under margin of 

 the larger hand of the male is provided with acute tuber- 

 cles in Kuhlii., that are much smaller in africana; also 

 the upper and outer surface of the hands and the upper 

 surface of the mobile finger is more coarsely granulated 

 in Kuhlii., than in the other form. 



The upper and under margins of the meropodites of the 

 ambulatory legs are more coarsely granulated in Kuhlii., 

 than in africana and the dactylopodites are much more 

 enlarged in the Indian species. 



These two species are therefore quite different, and it 

 is only by Mr. Miers not having seen specimens of Ocyp. 

 africana, that he has been led to suppose Ocyp. Kuhlii 

 to be not specifically distinct from the species of the West- 

 Coast of Africa. 



Dimensions of a female of Ocyp. africana from Liberia : 

 Distance of the external orbital angles 33 •/2 m.m. 

 Length of the carapace 29 m.m. 

 Length of the larger hand 27 m.m. 

 Height of the larger hand 15 m.m. 



Notes Irom the Leyden ]Mu8euin, Vol. V. 



