1888.] G. M. Giles— iVo/e5 on the Ampliipoda of Indian Wdters. 235 



The posterior appendages are, however, admirably adapted for cling- 

 ing to any chance protection that might be met with. 



The male is provided with five pairs of simple branchial lamince 

 attached to each thoracic appendage between the third and seventh in- 

 clusive. In the female, the gravid egg pouch readers it difficult to make 

 out the exact number of these laminae, but I am inclined to think that 

 it is the same as in the male. 



Our species diifers from M. gryllotalpa in the much greater propor- 

 tionate size of the 8th thoracic appendage ; from M. •wehsterii in the 

 larger size of the seventh appendage and in the body of the latter being 

 much stouter ; from M. anomalus and M. tenuis in the appendage of 

 the superior antenna being uni- instead of multi- articulate ; from M. 

 versiculatus in the posterior thoracic appendages being longer in that 

 species, and in the peculiar form of the anterior thoracic appendages of 

 versiculatus ; from M. longipes in the antennules and antennse being 

 subequal in our species, while in the former the antennule is much 

 longer than the antenna ; from M. macromjx, in the three posterior seg- 

 ments of the pieon being armed with spines ; from M. grandimanibs 

 in the antennules and antennse being nearly of equal length and in the 

 form of the last pair of abdominal appendages, which in our species have 

 the peduncle much shorter than, instead of subequal to, the rami ; from 

 M. australis, M. tenuipes, and M. chelifer, in the flagellum of the 

 antennules being shorter instead of longer than the peduncle ; and from 

 M. mortoni in this same point (which appears to characterize all the 

 Australian members of the genus), and in the form of the first gnathopod 

 of the male; M. maculatus (Thompson, Am. N. 4, (5), IV, p. 33, from 

 Dunedin, New Zealand), agrees with the other Australasian forms in 

 possessing a very long antennule, the appendage of which is multi- 

 articulate, and differs further from our species in the comparative short- 

 ness of the 7th thoracic appendage. 



4. MONOCULODES MEGAFLEON, n. Sp., PI. VII., Fig. 12. 



This species was taken at the surface in the drift net in rather tur- 

 bid water on the banks off Chittagong. 



Only a single (probably male) specimen was obtained, so 

 that I am unable to furnish any details as to its more minute 

 anatomy. The animal is 3*2 mm. long, of a dirty white colour, 

 and the intestinal canal shews through the carapace as a greenish 

 streak. 



The head is very small, and is produced in front into a peculiar, 

 down-turned hooked rostrum, very minutely serrated along its posterior 

 border. The anterior half of the upper surface, and a portion of the 

 31 



