552 COLLECTIONS FROM THE WESTERN INDIAN OCEAN. 



not denticulated. Ambulatory legs with the joints unarmed ; the 

 mcrus-joints in the third and fourth pairs, although slightly dilated, 

 much less so than in G. jukesii, nor is their surface tuberculated 

 and their margins denticulated as in that species; the penultimate 

 joints are also less dilated, the dactyli about as long as the preceding 

 joints. Colour (iu spirit) yellowish or whitish. Length of carapace 

 of the largest specimen (a female) about 4 lines (nearly 9 millim.), 

 length of leg of the third pair about 8 lines (17 millim.). 



Seychelles, 4-12 fms. (No. 194); an adult and smaDer female 

 and two small males. 



This species is nearly allied to C. jukesii, White*, from Sir C. 

 Hardy's Island, Australia, from which it is distinguished by the 

 different form of the cristiform lobe of the ocular peduncles, and the 

 much less dilated and non-denticulated merus-joint of the third and 

 fourth ambulatory legs. .From G. dentata, A. Milne-Edwardsf, 

 from the West Indies, to which it is also apparently nearly related, 

 it is distinguished by the non-spinose or dentated merus-joints of 

 the legs and by the smaller chelipedes of the male. 



ANOMURA. 



1. Dromidia spongiosa, Stimpson, var.? stiinpsonii. 

 (Plate L. fig. A.) 



A female from Mozambique, obtained between tide-marks (No. 

 224), may perhaps be referred to this species. It differs from 

 Stimpson's description only in the form of the front, which, although 

 deeply longitudinally concave, is not at all bicuspidate, and in the 

 coloration, which (in spirit) is brownish, the fingers only being 

 red. This character and also the absence of orbital teeth will dis- 

 tinguish this species from the Dromidia '! rotunda, M'Leayj, also 

 from the Cape. From the Dromidia unidentata, Riippell, which 

 Bianconi§ records from Mozambique, it is apparently distinguished 

 by the much shorter pubescence of the carapace and legs, and by 

 the obsolescence of the lateral marginal tooth, as well as by the non- 

 bicuspidate front. If it be specifically distinct, I would propose the 

 designation D. stirtvpsonii for this form, which when received was 

 deeply ensconced in a species of tunicate Ascidian. 



A very small male is in the collection from Poivre Island or He 

 des Roches, whose generic position (in the absence of specimens of 

 the female sex) must remain uncertain, which is possibly referable 

 to the D. rotunda, M'Leay. As in that species, the front is distinctly 

 bicuspidate, and there is a tooth above the inner margin of the 

 orbit. There is no tooth, but only a slight prominence, behind the 

 lateral sutures of the carapace. The body and legs are clothed with 



* Appendix to Jukes's Voyage H.M.S. ' Fly/ p. 338, pi. ii. fig. 1 (1847); 

 Miers, Crust, in Zool. ' Erebufl ' and ' Terror.' p. ."!. pi. iii. figs. 4, 4a (1874). 

 t Bull. Mus. Comp. Zool. viii. p. 28 ( 18s(>). 

 { Annulosain Smiths Zool. S. Africa, p. 71 (1849). 

 § Mem. Aecad. Bologna, ser. 2, ix. p. 207 (1869). 



