Mr. E. J. Miers on Ocypoda. 385 
ley’s revision of the genus, was only known by the very brief 
and insufficient diagnosis of its author until fully redescribed 
by Dr. De Man (¢. c. p. 250), who records it only from Java 
and the Indian archipelago. In the typical form of this species 
the carapace is granulated more coarsely toward the sides than 
in the middle line, the antero-lateral (or exterior orbital) angles 
are acute and rather prominent, and the stridulating-ridge in 
the adult (both male and female) consists of a series of small 
tubercles, as in O. arenaria; but the ambulatory legs are 
never margined with hairs as in that species, and the penulti- 
mate joints are much less dilated and compressed and more 
coarsely granulated. 
To this species are referred :—a series of rather small speci- 
mens from ‘Thursday Island, Torres Straits (Dr. Coppinger, 
HM.S. ‘ Alert’); an adult male from Shark Bay, W. Austra- 
lia (Surgeon Rayner, H.M.S. ‘Herald’), and other adult 
examples collected during the same expedition and probably 
from the Australian seas, but without special indication of 
locality ; also an adult female from Japan and small specimens 
from the New Hebrides (W. Wykeham Perry) and Sandwich 
Islands (W. H. Pease), and an adult female and smaller male 
from Madagascar (fev. Deans Cowan and Dr. J. H. Gray). 
In certain specimens, as (e. g.) in the adult female from 
Madagascar, the tubercles of the stridulating-ridge show a 
tendency to widen out into small secondary ridges. This 
specimen further resembles the following variety in having the 
carapace much more evenly granulated, the granulations on 
the gastric and cardiac regions being very nearly as coarse as 
on the sides of the branchial and the hepatic regions. In 
certain smaller specimens, as, for instance, in two from the 
New Hebrides, the antero-lateral angles of the carapace are 
much less prominent. 
I can see no reason why the Ocypoda convexa of (uoy and 
Gaimard*, from Australia, should not be referred to this 
species or to O. cordimana. The original description does 
not state if there be a stridulating-ridge, although the words 
“ chaque pince a deux rangs de petites granulations & son ex- 
trémité”’ may refer to this structure. In the figure the pe- 
nultimate joints of the ambulatory legs of the first and second 
pairs are represented as fringed with short hairs on their ante- 
rior margins. 
I consider the Ocypoda oocidentalis of Stimpson + (to which 
no reference is made by Mr. Kingsley), from California, Cape 
* Voy. de l’Uranie, Zool, iii. p. 525, pl. xxvii, fig. 9 (1824); Kingsley, 
t. c. p. 185 (1880). 
+ Ann. Lye. Nat, Hist. New York, vii. p. 229 (1860). 
Ann. & Mag. N. Hist. Ser. 5. Vol. x. 26 
