COLLECTED IN CEYLON, 313 



Carapace tumid ; seen from the side, obliquely quadrangular ; 

 height the same throughout and equal to about two thirds of the 

 length ; anterior extremity obliquely rounded, posterior obliquely 

 rounded below, produced into an obtuse beak near the middle, 

 obliquely truncate above ; dorsal margin straight, with a very pro- 

 minent angulated hump at the posterior extremity, ventral straight : 

 seen from above, the outline resembles that of two triangles 

 applied to each other by their bases — a large one in front, a smaller 

 behind ; the greatest width equal to three fourths of the length, 

 extremities subacuminate ; end-view irregular, height somewhat 

 less than the width, broadest at the base ; dorsal margin broad 

 and irregularly arched. Surface of the shell closely set with 

 coarse impressed punctures ; hinge-tubercle glistening and pro- 

 minent ; a large, round, alseform process behind the middle of the 

 valve just within the ventral margin, and a large angular promi- 

 nence at the posterior end of the hinge-margin. Length -^ of 

 an inch ('46 millim.), 



LOXOCONOHA AVELLANA, G. S. Brad;!/. 



Normania avellana, Brady, Trans. Zool. Soc. vol. v. (1865), p, 382, 

 pi. Ixi. figs. 15 a-c. 



Loxoconcha avellana, Brady, Report on the Ostracoda of the ' Chal- 

 lenger' Expedition, p, 117, pl,xxviii, figs. 1 a-f. 



These specimens are more tumid than the type (West Indies), 

 but less tumid than those from Australia, figured in the ' Chal- 

 lenger ' Report. 



Loxoconcha papillosa, n. sp. (Plate XL. figs. 33, 34.) 

 Carapace seen from the side rhomboidal, height equal to more 

 than two thirds of the length, slightly higher behind than in front ; 

 anterior extremity rounded, posterior obliquely truncated and 

 forming a very slightly produced beak at the dorsal angle ; dorsal 

 margin very gently arched, ventral straight ; all the angles ex- 

 cept the postero-dorsal well rounded : seen from above, ovate, 

 fully twice as long as broad, widest in the middle, extremities 

 broadly pointed, the posterior more produced and tapered than 

 the anterior. End-view ovate. Surface smooth and polished ; 

 ornamented with numerous closely- set raised circular papillae. 

 Length -^ of an inch ("5 millim.). 



Loxoconcha elongata, n. sp. (Plate XL. figs. 31, 32.) 

 Carapace, seen from the side, elongated, flexuous, of equal 



