178 Mr. G. 8. 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 1s 
quite smooth. Dr. Kinahan’s figures and description of this 
latter species are very good (Trans. Royal Irish Acad. 
vol. xxiv. (1861) p. 76; and Proc. Royal Irish Acad. 1862, 
p- 362, pl. 12). Crangon nanus, Kroyer (= C. bispinosus 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, 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 C. sculptus 
I have procured in the Minch, Lamlash Bay, and Guernsey. 
XV1.— Contributions to the Study of the Entomostraca. 
By GEORGE STEWARDSON Brapy, C.M.Z.S8. &e. 
No. Il. 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. Hodgit, occur also in the Malay archipelago, 
and that the specimens from the Mauritius exhibit slight, but 
decided differences ; while Macrocypris maculata, Xestoleberis 
margaritea, and OCytheridea 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, pl. iv. figs. 1-14, I should con- 
clude that it is distinct from all our British species. 
