130 CRUSTACEANS OF THE 



The median process of the smooth posterior margin of 

 the epistorae is broadly triangular and terminates into the 

 prominent, compressed, median, palatal ridge, visible in a 

 front- view of the cephalothorax ; the lateral ridges are 

 also distinct. A faint transverse groove separates the 

 subhepatic region from the branchial floor, both these re- 

 .gions as also the branchiostegite are nearly smooth, the 

 oblique wrinkles on the postero-lateral margins of the 

 cephalothorax reaching not far on the floor of the bran- 

 chial chamber. The merus-joint of the outer foot-jaws is 

 a little broader than long (Fig. Ih^^); the arcuate outer 

 margin makes an obtuse angle with the shorter straight 

 anterior one. The ischial line runs, a little obliquely, 

 just in the middle of the ischium-joint , but does not 

 reach the anterior margin. The outer foot-jaws are punc- 

 tate, smooth. 



The abdomen of the female is also finely punctate, the 

 terminal segment is triangular with obtuse extre- 

 mity. The chelipedes of the female are small, the right 

 is somewhat larger than the left. The arms are short, the 

 upper margin unarmed at the distal end, the lower surface 

 smooth, with no tubercle near the carpus and with entire 

 margins ; the upper margin carries a few oblique wrinkles. 

 The upper surface of the wrist is slightly wrinkled out- 

 wards and near the inner margin, but almost smooth in 

 the middle ] there is a small acute spine at the inner angle. 

 The right chela is a little more than half as long as the 

 carapace is broad , the fingers, in contact with one ano- 

 ther, are slightly longer than the palm that is just as 

 high as long. The palm bears on its outer surface a few 

 small, more or less sharp tubercles, that are somewhat 

 larger at the base of the immobile finger and that are 

 also observed on the two ridges bounding the longitudinal 

 groove on the outer surface of this finger ; the faintly 

 grooved dactylus is also a little tubercular. The immobile 

 finger is armed with eight or nine acute teeth , about 

 of the same form and size, those of the dactylus are 



Notes from tlie Leyden M.iiseum, "Vol. X.X1. 



