D'ly of Bengal and the Arahian Sea. V.\ 



Spondijlus imperialis, Chenit. 

 Hab. Off south coast of Ceylon, 34 fath. 



Pec ten Alcocki, sp. n. 



Testa sequivalvis, requilateralis, teauissima, subpellucida, rotuncLita, 

 seriebus radiaatibus et conceutricis, numerosis squamanim mitiu- 

 tarum ornata, mediocriter convexa, radiatim tenuiter striata ; 

 auriculae ingequales, aritica valvoe dextr£e infra profunde siuuata, 

 liria quaternis granosis radiata. 



Longit. 18 mm., alt. 19, diam. 7. 



* Hab. Station 232, off South India, 430 fath. 

 The radiating striae have the appearance of short scratches 

 and are closer together down the sides of the valves. The 

 scales which roughen the surface are generally more or less 

 worn oft', their position being indicated by the crenulated 

 concentric lines of growth. 



Pecten mirificus, Reeve. 



Pecten viirificus, Reeve, Conch. Icon. vol. vlii. fig. 104. 



Hab. Off south coast of Ceylon, 31 fath. ; Amboyiia 

 [Reeve) ; Maldive Islands {Gardiner) , 



Pecten nux^ Reeve. 



Pecten nux, Reeve, Conch. Icon. vol. viii. fig. 143 (errata), 



Hab. Off south coast of Ceylon, in 34 fath.; Maldive 

 Islands [Gardiner) ; Marquesas Island [Reeve). 



Pecten speciusus, Reeve. 



Pecten speciosus, Reeve, Con. Icon. vol. viii. tig. 112. 



Hab. Off south coast of Ceylon, 31 fath. ; Philippine 

 Islands [Reeve). 

 One valve only. 



Janira Gardineri, Smith. 



Janira Gardineri, Smith, in Gardiner's 'Fauna and Geography of Ihe 

 MaliJive and Laccadive Archipelagoes/ vol. ii. p. 622, pi. xxxyi. 

 tigs. 21, 22. 



Hab. Off south coast of Ceylon, 34 fath. 



Amussium caducum, Smith. 



Aviussiicm caducum, Smith, ' Challenger ' Lamellibranchiata, p. 309, 

 pi, xxiii, tigs. 1-1 c; Ann. & Mag. Nat. Hist. 1894, vol. xiv. p. 173. 



Hab. Andamans, 490 fath. ; off" Colombo, 531 fath. 



