226 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
Genus Catcinus, Dana. 
180. CALCINUS TERRA-REGINA, Hasw. 
Calcinus terre-regine, Haswell, Catalogue of the Australian Stalk- and 
Sessile-eyed Crustacea, 1882, p. 158. 
A single representative of this genus, inhabiting the shell of a 
Murex, was found at Elphinstone Island. I regard it as a variety 
of Haswell’s C. terre-regine, a species which occurs on the coast 
of Queensland, Australia. 
Three species of the genus Calcinus are very closely allied to 
one another, viz. C. intermedius, de Man, from the Red Sea, 
CO. terre-regine, Hasw., from Queensland, and C. nitidus, Heller, 
from Tahiti. Calcinus intermedius * seems to differ from the 
Mergui species in the following characters :—The fingers of the 
larger hand are minutely punctate and nearly as long as the 
palm in C. intermedius, whereas in the Mergui specimen they are 
distinctly shorter than the palm, and covered with small rounded 
and flattened granules. The inner surface of the palm of the 
larger hand is quite smooth in C. intermedius, but a little granu- 
lar towards the base of the immobile finger in the Mergui 
specimen. The carpopodites of the legs of the second pair are 
armed with two small spines at the distal ends of their upper 
margins in C. intermedius, but only with one small spine in the 
Mergui species. The dactylopodites of the ambulatory legs of 
C. intermedius are scarcely shorter than the penultimate joints, 
but in the Mergui species they are distinctly shorter, those of 
the second legs measuring two thirds of the length of the propo- 
dites, whereas the propodites of the legs of the third pair are 
53 millim., and the dactylopodites 43 millim. long. The Mergui 
species is, moreover, differently coloured from the species from 
Djiddah. ) 
I regard this specimen as a variety of Haswell’s Calcinus 
terre-regine, with whose description it completely agrees except 
in its coloration, and in the armature of the mobile finger of 
the smaller (right) chelipede. In the Mergui specimen this 
structure is armed with twelve small teeth placed biserialiy, as 
in C. intermedius, whereas in the species from the Queensland 
* Tam unable to compare the specimen from Elphinstone Island with the 
typical and only specimen of C. intermedius, preserved in the Leyden Museum, 
because the Museum statutes do not admit of the specimen being sent to me. 
