226 DE. J. Or. DE MAN Olf THE POBOPHTHALMOUS 



Grenus CAiiCiNiJS, Dana. 

 130. Calcinus TEEEiE-EEaiNiE, Hasw. 



Calcinus terrse-reginse, Haswell, Catalogue of the Australian Stalk- and 

 Sessile-eyed Crustacea, 1882, p. 168. 



A single representative of this genus, inhabiting the shell of a 

 Mureoff, was found at Elphinstone Island. I regard it as a variety 

 of Haswell's G. terrm-regina, a species which occurs on the coast 

 of Queensland, Australia. 



Three species of the genus Calcinus are very closely allied to 

 one another, viz. G. intermedius, de Man, from the Eed Sea, 

 G. terrcs-regincB, Hasw., from Queensland, and G. nitidus, Heller, 

 from Tahiti. Galcinus 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 G. 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 G. 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 G. intermedius, but only with one small spine in the 

 Mergui species. The dactylopodites of the ambulatory legs of 

 G. 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 

 5| millim., and the da,ctylopodites 4| millim. long. The Mergui 

 species is, moreover, differently coloured from the species from 

 Djiddah. 



I regard this specimen as a variety of Haswell's Galcinus 

 terrcB-regincB, 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 biserially, as 

 in G. intermedius, whereas in the species from the Queensland 



* I am 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. 



