4 Annals of the South African Museum. 



described both by him and by Alcock, is not found in the African 

 specimen. 



There are numerous groups of curved setae on the frontal horns 

 and in two lines to the middle of the carapace, thence diverging to 

 the branchial regions. Many also are conspicuous at the bases 

 of the lateral spines and about the walking legs, only leaving the 

 dark ungues uncovered. 



The length of the carapace is 100 mm., of which a straight line 

 between the frontal horns measures 15 mm., the inner side of the 

 horn being 18 mm. in length. The extreme breadth of the carapace 

 is 85 mm., or 69 mm. without the projecting lateral spines. 



Locality. Durban. The specimen from the Durban Museum was 

 entrusted to me by the curator, J. F. Quekett, Esq., out of respect 

 to whom the specific name is given. 



Locality. Port Elizabeth. The specimen received from Mr. 

 FitzSimons under the circumstances above mentioned, has a cara- 

 pace 130 mm. long, allowing 5 mm. for the broken tip of the least 

 damaged frontal horn. The extreme breadth is 105 mm., or 90 mm. 

 not including the lateral spines. The right cheliped measures 

 150 mm., of which 35 belong to the fifth joint, and 55 to the hand 

 and fingers. Between these fingers when closed there is proximally 

 a prolonged and rather conspicuous gap. In this specimen it is easy 

 to see how strongly the orbits are excavated backwards. The eye- 

 stalks appear to be more strongly curved than in Mamaia squinado. 

 They are rather bulbous at the base, but then narrow, with the 

 visual area narrowly oval. The stout bifid spine at the centre of 

 the carapace might in this example equally well be described as a 

 closely contiguous pair of transversely placed spines. They are very 

 prominent. In the other specimen unfortunately the bird's-eye 

 view taken by the camera does not at all clearly show these sharp 

 projections. 



GEN. PLATYMAIA, Miers. 



PLATYMAIA WYVILLE-THOMSONI, Miers. 



1886. Platymaia ivyville-thomsoni, Miers, Challenger Brachyura, 



Eeports, vol. xvii., p. 13, pi. 2, fig. 1. 



1902. Platymaia turbynei, Stebbing, S.A. Crust., pt. 2, p. 3, pi. 5. 

 1904. Platymaia ivyville-thomsoni, Doflein, Valdivia Brachyura, 

 p. 89, pis. 2, 20-23, &c. 



It is desirable here to call attention, not only to Herr Doflein's 

 identification of P. turbynei with the species named by Miers, but 

 also to the very elaborate and valuable study of the species in the 

 Brachyura of the Valdivia expedition. 



