Boone, Crustacea, Cruise of "Alva," 1931 43 



The type series of M. militaris andamanica Alcock came from 

 the Andaman Sea, at ten stations of the "Investigator" at depths 

 ranging from 173 to 405 fathoms, and from the Arabian Sea 

 in the neighborhood of the Laccadive and Maldive archipelagoes 

 at two stations, ranging from 210 to 360 fathoms, and is deposited 

 in the Calcutta Museum. 



Distribution : Indo-Pacific, deep water. 



Material examined : One young specimen taken from fish's 

 mouth at Trong village, Admara Island, Solar Straits, Dutch East 

 Indies, October, 1931, by the "Alva." 



Technical description : The front is produced into a strong, 

 slender, acute, rostral spine, one-half or slightly more than one- 

 half as long as the carapace, the distal third extending beyond the 

 eyes, flanked by a pair of submedian, rostral spines, each about 

 half or slightly more than half as long as the rostral spine. These 

 spines are acute, laterally compressed, dorsally carinate. There 

 is a strong acute spine about two-thirds as long as the submedian 

 rostral spines, situated at the postorbital angle. The carapace is 

 decidedly convex from side to side and broken by about fourteen 

 transverse ridges, seven of which occur on the precervical por- 

 tion of the carapace. The first of these ridges bears fifteen spinules 

 in irregular series, one slightly larger, being on the anterolateral 

 margin succeeded by six short ones, while the seventh spinule is 

 also larger and is situated behind the submedian rostral spine; 

 the eighth spinule is small and is on the median line. On the third 

 transverse ridge there is a solitary spinule, a little in advance of 

 the cervical sulcus, and in line with the third (from the outermost 

 side) spinule of the first ridge. Posterior to the cervical groove 

 there are two solitary spines on each side of the carapace; the 

 anterior one of these is on the seventh ridge, at the inner edge of 

 the ridge outside of the cervical groove and in line transversely 

 with the third postcervical spinule, of the lateral margin. The 

 other spinule is on the eighth transverse ridge, at its inner end, just 

 behind the cervical groove. These transverse ridges are minutely 

 granulose and fringed with short, silky, forward-directed setae. 

 The second precervical ridge and first to fifth, inclusive, post- 

 cervical ridges each terminate in an acute, forward-directed spine 

 on the lateral margin. 



The abdominal segments are each marked by transverse ridges, 

 but no spinules are present, except on the anterior margin of the 



