228 Records of the Indian Museum. [Voi,. IX, 



1. Scalpellum alcockianum, Annandale. 



Off Ceylon : 859—880 fathoms. 



2. S. velutinum, Hoek. 



Indian and Atlantic Oceans : 35 to over 1200 fathoms, 



3. 5. trapezoideum, Hoek. 



Off Ceylon and in the Malay Archipelago : 590 to 1508 

 fathoms. 



4. 5, pacificuniy Pilsbry. 



Arabian Sea and seas of Hawaii : 222 to 1299 fathoms. 



5. S. novae-zelandiae, Hoek. 



Pacific, Indian and Atlantic Oceans : 490 to 1520 

 fathoms. 



6. 5. woodjjiasoni , Annandale. 



Arabian Sea : 890 fathoms. 



7. 5. albatrossianmn, Pilsbry. 



N. Atlantic and B. of Bengal : 1997 and 2045 fathoms. 



8. S. gruvelii, Annandale. 



Indian Ocean : 434 to 1200 fathoms. 



9. 5. curiosum, Hoek. 



Off C. Comorin and in the Malay Archipelago : 269 to 

 595 fathoms. 

 10. 5. lambda, Annandale. 



B. of Bengal : 643 fathoms, 

 ri. 5. longms, sp. no v. 



Off Andaman Is. : 130 — 250 fathoms. 

 12. 5. laccadivicum , Annandale. 



Arabian and lyaccadive Seas and in the Malay Archi- 

 pelago : 434 to 1 154 fathoms. 



KEY TO THE INDIAN SPECIES OF SCALPELLUM {S.S.). 



1. Umbo of carina apical ; the whole valve simply 

 arched. 



A. Capitulum with paired valves relatively small 



(though almost complete), widely separated and 

 almost entirely concealed by an opaque mem- 

 brane ; margins of tergum not excavated .. S. alcockianum, p. 229. 



B. Paired valves relatively large, always in contact 



or almost so at certain points ; membrane 

 never opaque 



1. Carinal latera meeting behind below the base of 



the carina. 



a. Carinal latera very prominent, projecting out- 



wards as well as backwards ; valves of 



lower whorl imbricate .. .. S. velutinum, p. 22g. 



b. Carinal latera moderately prominent, project- 



ing backwards but not outwards ; all 



valves adjacent . . . . . . S. trapezoideum, p. 230. 



2. Carinal latera meeting behind over the base of 



the carina. 



a. Posterior basal part of carinal latera with 



strong radiating ridges . . S. pacipcum, p. 230. 



b. Posterior basal part of carinal latera smooth 5. novae-zelaniiae, p. 231. 



II. Umbo of carina forming a distinct projection on the 

 dorsum of the valve, never apical. 

 A. Valves stout, complete, conspicuously striated. 



I. Inframedian latus pointed above, moniliform . . 5. woodmasoni, p. 232 



