178 Mr. G. S. Brady on Marine Ostracoda 



Crangon sculptus and fasciatus. 



I am surprised at Mr. Bate's suggestion that Crangon 

 sculptus and Crangon fasciatus are the same species. In my 

 humble judgment, no two Crangons belonging to the same 

 section of the genus can have stronger distinctive features. 

 Can it be that Mr. Bate has not met with the true C . fasciatus"^ 

 The differences are not confined to the number of spines : 

 there are other characters ; and of far more consequence is the 

 fact that, whereas in C. sculptus the abdomen is elaborately 

 ornamented with beautiful sculpturing, in C. fasciatus it is 

 quite smooth. Dr. Kinahan's figures and description of this 

 latter species are very good (Trans. Eoyal Irish Acad, 

 vol. xxiv. (1861) p. 76; and Proc. Eoyal Irish Acad. 1862, 

 p. 362, pi. 12). Crangon nanus ^ Kroyer {— C. hispmosus of 

 Hailstone) appears to me to be the species most closely related 

 to C, fasciatus*. 



P.S. As though to confirm what I have just said — among 

 some shrimps dredged during the past month in Shetland by 

 Mr. Jeffreys, and received from, him this morning, I find se- 

 veral C. fasciatus J but there are no C. sculptus ; nor is that 

 species known to inhabit the Shetland seas. I have never 

 found these two species in company, nor seen a specimen in- 

 termediate in character. Crangon fasciatus I have dredged 

 off the Northumberland coast (where C. sculptus has not been 

 found at all), at Falmouth, and off Guernsey ; and (7. sculptus 

 I have procured in the Minch, Lamlash Bay, and Guernsey. 



XVI. — Contributions to the Study of the Entomostraca. 

 By George Stewaedson Brady, C.M.Z.S. &c. 



No. II. Marine Ostracoda from the Mauritius, 



[Plates XII. & XIII.] 



The species here described have been found in mud brought 

 from the Mauritius, and kindly placed in my hands by my 

 friends Messrs. Thomas Blain and E. C. Davison, of Sunder- 

 land. It is interesting to note that two of the species, Cythere 

 Darwinii and C. Hodgii^ occur also in the Malay archipelago, 

 and that the specimens from the Mauritius exhibit slight, but 

 decided differences ; while Macrocypris maculata^ Xestoleheris 

 margaritea^ and Cytheridea punctillata have a still wider range 



* Judging from Kroyer's figures of C. boreas, Phipps, in the ' Natur- 

 historisk Tidskrift,' vol. iv. (1842) p. 218, pi. iv. figs. 1-14, T should con- 

 clude that it is distinct from all our British species. 



