i82 Records of the Indian Museum. [Vol. VI, 



In the second antennae the third joint is rather shorter than the 

 fourth, and the fourth than the fifth, all three being closely 

 fringed with setules ; the flagellum has eighteen joints each with 

 an apical tuft of setae. 



The upper lip has the 'margin obtusely triangular, not as in 

 S. walkeri feebly trilobed and in 5. terebrans evenly curved. 



The mandibles have the cutting edge formed by two power- 

 ful well-separated teeth, not as in 5 terebrans by what appears 

 to be a consolidated piece. Between the cutting edge and the 

 strong molar is a series of little spines, curving towards the molar, 

 very different from the little tuft of spines in the other species. 



The lobes of the lower lip are less narrowed distally than in 

 5. terebrans. The first maxillae have three plumose setae on the 

 inner plate, not four as in 5. walkeri, the broad outer plate strongly 

 setulose all along the outer margin, the apical bordered with 

 spines, nine or more, most of them serrate, and two short smooth 

 spines at the inner angle. The second maxillae are especially dis- 

 tinctive by the broad subquadrate form of the inner plate, very 

 different from the oval apically acute shape in 5. walkeri. The 

 maxillipeds also differ by having the antepenultimate joint more 

 narrowed distally. 



The limbs of the peraeon are substantially alike in the two 

 species, unless any importance can be attached to the stronger 

 feathering in the specimens here dealt with. This armature in 

 the second and third peraeopods, helped to some extent b^^ extra- 

 neous accretions, gave those limbs the appearance of woolly 

 masses, in which it was extremely difficult to determine either the 

 outlines of the several joints or the articulations between them. 

 The body of the animal carries some scattered setae, the borders 

 of the side-plates of the pleon are furred, the plates of the uropods 

 have setose margins, the number of teeth on the outer margin of 

 the movable ramus being obscured by the thickness of the accom- 

 panying fringe. 



The length of the specimen figured is about 9 mm., with a 

 breadth about half the length. 



Locality. — Port Canning, brackish water pool. 



[Specimens of the species are often very abundant in the 

 larger canals of the sponge Spongilla alba var. bengalensis , a form 

 common in brackish water in the Gangetic delta. They are 

 referred to on p. 78 of my forthcoming volume on the freshwater 

 sponges, etc., in the ''Fauna of British India" series, as repre- 

 senting a species allied to Sphaeroma walkeri, Stebbing. — N. A.] 



The specific name is given out of respect to Dr. Annandale 

 by whom the two specimens were obtained. 



Tribe ONISCIDEA. 



The species about to be considered are all included in the 

 family Oniscidae as summarized by Budde-Lund in his Revision 

 of 1904. Without presuming to criticise the learned author's 



