PHYMODIUS OBSCÜRUS. 



475 



as stated by Mr. Milne Edwards , occurs in the Red Sea. This 

 species may be also identical with Xantho dehaanii Krauss = 

 CIdorodhis dehaanii Heller (Sitzungsber. Wiener Akad. Bd. 43, 

 pag. 337). 



The carapace is 16 '/g mm. broad and 11 mm. long. 

 The whole surface of the carapace is divided into uunierous 

 regions, separated by tolerably deep grooves from one 

 another, the surfaces of which being covered with many 

 bright granules, which are equally large on the epigas- 

 trical lobes, as on the protogastrical lobes divided by a 

 longitudinal groove into two parts, and on the hepatical 

 regions, so that they may be observed with the naked 

 eye, but they are much more minute on the mesogastrical 

 and branchial regions. — The front has four lobes, 

 the two median ones are broad and granular, though 

 rounded , separated by a deep incision from one another and 

 by a larger emargination from the two outer dentiform 

 small lobes. Besides the external orbital angle , there are 

 four lateral teeth on the lateral margins of the carapace, 

 which are also granular and of which the two posterior are 

 a little more acute than the two anterior ones. Of the 

 anterior legs the left one is a little larger ; the arms project 

 but little beyond the lateral margins of the carapace, their 

 upper margin is armed with some more or less acute tu- 

 bercles. Also the upper surface of the wrist, and the 

 upper and outer surface of the hands are covered with 

 dark, more or less acute tubercles, those of the outer 

 surface of the hands are placed in longitudinal rows, 

 but the under and inner surfaces of the hands are smooth. 

 The fingers are black, there are a few granules on the 

 upper surface of the mobile finger near the articulation 

 and the fingers are provided with many longitudinal 

 grooves ; the spoonlike excavated ends have a white margin. 

 The ambulatory legs are covered with pinnate long hairs , 

 the upper margin of the meropodites is armed with a row 

 of sharp spines and the outer surface is granular. The 

 abdomen has five segments. 



Notes from the Leydeii Miiseuin , Vol. II. 



