202 PERCY SLADEN TRUST EXPEDITION 



24. Leucosides jecusculum, sp. nov. (Plate 15, fig. 7). 

 Amirante, 34 fms., Sta. E 9 ; 1 $ ovigerous. 

 Dimensions. — $, C. 1. 10'2 mm., C. b. 97 mm. 



A smooth, shining species. Cai'apace very little longer than broad, with a short, 

 projecting front, separated by a hollow from the slightly convex hepatic region. Margin 

 of front trilobed, middle lobe truncate with oblique sides ; outer lobes truncate in front, 

 oblique on outer side. Antero-lateral margin, up to the branchio-hepatic sinus, nearly 

 straight, ornamented with 6 sharpish spaced granules ; lateral rounded angle of carapace 

 with a rim of smaller, close-set bead granules. The thoracic sinus has no definite anterior 

 border, is covered with a mat of short hair which conceals a short line of granules along 

 the lower margin. The whole of the epimeral edge is visible in dorsal view ; it is bordered 

 with a raised line of very fine granules continued on the posterior margin ; surface below 

 the latter smooth. 



Arm bordered by large bead granules ; two converging lines of the same on proximal 

 half of upper surface ; two lines of similar but smaller granules along inner edge of lower 

 surface and a few large granules at base of inner surface ; a patch of spongy hair at base 

 of upper and inner surface. Width of hand equal to outer length ; a line of fine granules 

 above, just within inner margin and coarser on basal lobule. Fingers slender, longer than 

 palm, with a narrow gape which diminishes regularly to the crossed tips, the dactylus 

 considerably overreaching the immovable finger. 



The merus joints of the legs are flattened, have two rows of fine granules below and 

 one row above except in the first leg where there are two ; propodal joints with sharp 

 crests above and below, dactyli long and slender. 



Colour. — The anterior § of the carapace is reticulated with light brown (in alcohol), 

 a spot of same colour either side of intestinal region, and another near postero-lateral margin 

 above first ambulatory leg; a band of yellow across middle of fingers and across merus of 

 legs. 



This species belongs to the same group as L. cumingi, L. hilaris and L. sima, the 

 distinctive characters of which are given by Nobili in Bull. Sci. France et Belgique, xl, 

 1906, p. 102. In order to compare our species with those three, I give below a summary 

 of the above description to correspond with his table : 



1. Front rather prominent, trilobate. 



2. Hepatic region slightly inflated. 



3. Postero-lateral borders granulate as far as the first pair of feet. 



4. Thoracic sinus not defined anteriorly. 



5. Posterior border not prominent in the ?, rather wide. 



6. Hand with a line of granulations ; fingers longer than palm. 



7. Meropodites of ambulatory feet granulate above and below. 



25. Leucosides angulata, sp. nov. (Plate 15, fig. 8). 



Seychelles, 31 fms., Sta. F2; 1? type. 



Dimensions. — $, C. 1. extreme 12*4 mm., C. b. 11 "8 mm. 



