Bay of Bengal and the Arabian Sea. 457 



slender. PL amaUlis, AYeinkauff, is very closely allied, if 

 not identical. Hinds's locality, "California/' may yet be 

 confirmed. 



Pleurotoma jubata, Hinds. 

 Pleurotoma jubata, Hinds, Reeve, Conch. Icon. fig. 52. 



Hab. Off Mangalore, Malabar coast, 26-30 fatli. 

 One specimen, like the type, but with the beaded keel 

 scarcely at all beaded. 



Pleurotoma acutigemmata, var. minor. 



Pleurotoma acutigemmata, Smith, Ann. & Mag-. Nat. Hist. 1877, 

 vol. xix. p. 489. 



Hab. Off south coast of Ceylon, 34 fath. 

 A single specimen, only 13 mm. in length, like the type 

 in form and colour, but with the gemmate keel almost smooth. 



Pleurotoma unedo, Valenciennes. 



Pleurotoma unedo, Valenciennes, Kiener, Coq. Viv. p. 19, pi. xiv. fig. 1 ; 

 Eeeve, Conch. Icon. fig. 12. 



Hab. Eight miles south of Puri, 13 fath. 



Pleurotoma (Surcula) tornata (Dillwyn). 

 Surcula tornata, Try on, Man. Conch, vol. vi. p. 237, pi. v. fig. 62. 

 Hab. Same as preceding species. 



Pleurotoma (Surcula) symbiotes, Wood-Mason & Alcock. 



Pleurotoma {Surcula) symbiotes, Smith, Ann. & Mag. Nat. Hist. 1894, 

 vol. xiv. p. 101, pi. iii. figs. 7, 8. 



Hab. Station 233, off Andaman Islands, in 185 fath. 



These specimens do not differ from the type, which was 

 obtained in 1043 fath. off Southern India. Being in fresh 

 condition they are coated all over with the very thin peri- 

 ostracum mentioned in the description. 



Pleurotoma (Surcula) Thurstoni, Smith. 



Pleurotoma (Surcula) Thurstoni, Smith, Aim. & Mag. Nat. Hist. 1896, 

 vol. xviii. p. 369. 



Hab. Off Trincomalee, in 200-350 fath. ; and Station 229, 

 off Travancore coast, in 3G0 fath. 



One specimen from the latter locality is larger than the 

 type, being 55 mm. in length and 16 in width. 



