384 Mr. E. J. Miers on Ocypoda. 
I have seen no specimens referable to the O. Ryderi,. 
Kingsley (¢. c. p. 183), from the coast of Natal, which is de- 
scribed as closely allied to the American O. arenaria, but dis- 
tinguished by the existence of a minute terminal ocular spine 
and by having the ambulatory legs roughened by subspini- 
form granules. Unless it differ in the form of the stridulating- 
ridge, I see no reason why it should not be a variety of Ocy- 
poda ceratophthalma (Pallas). 
II. Eyes rounded at the distal extremity, not terminating in a 
spine or style. 
8. Ocypoda arenaria (Catesby). 
(Pl. XVII. figs. 7, 7a, 76.) 
Specimens are in the collection of the British Museum from 
the eastern and southern coasts of the United States (Smzth- 
sonian Institution), Georgia (7. Say), Jamaica, St. Christo- 
her’s (Dr. J. HE. Gray), Vera Cruz (f. Du Cane Godman), 
Bee ins (W. Forbes), and Rio Janeiro (Dr. Cunningham), 
besides others without special indication of locality. 
In all the specimens I have examined the carapace is more 
coarsely granulated on the hepatic and sides of the branchial 
regions than on the gastric and cardiac regions, the lateral 
(or exterior orbital) angles are acute and rather prominent. 
The stridulating-ridge on the inner surface of the palm of the 
larger chelipede consists in the adult (both male and female) 
of a series of tubercles, which do not lengthen out into ridges 
or strie. The ambulatory legs are dilated and compressed, 
the dilatation being most marked in the merus and penultimate 
joints ; and the penultimate and antepenultimate joints (and 
usually the merus) are clothed along their margins and par- 
tially on their inferior surfaces with long fulvous hairs. 
In one adult male example from Georgia the stridulating- 
ridge is nearly obsolete; it is represented merely by a few ir- 
regularly disposed tubercles. 
There is in the British-Museum collection an adult female 
(unfortunately without chelipedes), obtained by purchase as 
from Japan with other Crustaceans undoubtedly Japanese, 
which closely resembles O. arenarta in the nearly smooth, 
dilated and compressed, and hairy ambulatory legs. Probably 
there is here some mistake regarding the locality at which the 
specimen was collected. 
9. Ocypoda Kuhlit, De Haan. 
(Pl. XVII. figs. 8, 8 a, 8 0.) 
This species, reference to which is not made in Mr. Kings- 
