254 



two-thirds that of the propodites, or more for their long acute points, and 

 for the trenchant posterior edges. 



This is a small species, egg-laden females measuring not more than 25 

 raillim. 



Colours, salmon-red to chestnut-brown. 



Bay of Bengal, 145-250 and 193 fathoms : Andaman Sea, 490 fathoms. 

 ' Begd. Nos. *252! (Types of the species) : f : 



23. Munidopsis scobina, Alcock. 



Munidopsis scobina, Alcock, Ann. Hag. Nat. Hist., April 1894, p. 330. 



ILLUSTRATIONS OF THE ZOOLOGY OF THE INVESTIGATOR, CRUSTACEA, PLATE XIII. FIG. 1. 



Body and appendages almost devoid of hairs, but with the spinature sharp 

 and distinct. No epipodites are present on any of the appendages behind the 

 external maxillipeds. 



The greatest breadth of the carapace is about six-sevenths of its length. 

 The rostrum, which is styliform and slightly recurved at tip, is not quite half 

 the length of the carapace; the frontal border is very slightly oblique and, 

 except for one or two small spinelets above the base of the antenna?, is smooth ; 

 the lateral borders, which are convergent anteriorly, are from six- to ten-spined ; 

 the posterior border is raised and is surmounted by a series of about ten spines ; 

 the gastric region bears a pair of spines at the base of the rostrum and a row of 

 spines along the middle line, and this row is continued along the cardiac region, 

 some of the spines there being bifid or trifid; on the branchial regions are 

 numerous sharp tubercles and spines. 



The abdominal terga and pleura are glabrous ; the second, third, and fourth 

 terga are deeply channelled transversely, the edges of the channel forming sharp 

 and very evenly spinate crests. 



The eyestalks are very short, free and freely movable, and not prolonged 

 beyond the ovoid eyes. 



The basal joint of the antennulary peduncles has three large terminal spikes 

 of nearly equal length, the innermost of which may be bifid or trifid. 



The spines on the joints of the antennal peduncles are remarkably distinct 

 and the flagellum is about twice as long as the body. 



The ischiopodite of the external maxillipeds is evenly toothed along the 

 inner edge and has a terminal spine on the lower edge, and the meropodite has 

 two spines near the proximal end on the lower edge. 



The thoracic legs are granular, or squamous, or spinate. The chelipeds are 

 somewhat longer, but hardly stouter, than the second, third, and fourth legs, and 

 in the male they are somewhat longer and in the female somewhat shorter than 



