2IO 



If this species is seen without the operculum, it might be considered to be a variety of 

 the polymorph N. marockiensis, but its umbilicus is much more filled by the funiculum. The 

 operculum is quite different from that of ?naroc/nensis described by Watson (Challenger- 

 Gastropoda, p. 434) and from specimens which I could compare. 



11. Natica strongyla Melvill. 



Melvill. Memoirs and Proc. Manch. Lit. and Phil. Soc. Vol. 41, 1897, N" 7, p. 1 1, PI. 6, fig. 20. 

 Stat. 98. 6°9'N., 120° 21' E. Sulu Sea. 350 M. Sand, i Spec. 



The specimen is a young, empty shell; it is not probable that this species with its 

 prominent colour-markings, has lived at so greath a depth. 



12. Natica ascllus Reeve. 



Reeve. Conch, ic. Vol. IX, Natica, fig. 136. 



Tryon. Man. of Conch. Vol. VIII, p. 24, PI. 6, fig. 3, 4. 



Stat. 7. Near reef of Batjulmati (Java). 15 M. Coral and stones, i Spec. 



The umbilicus of the Siboga-specimen is not quite closed and the row of small dots between 

 the two blue-black bands is wanting. I think these differences are of too little importance, to be 

 in doubt about the identity. 



13. Natica atypha Watson. 



Watson. Report Voy. Challenger. Zool. Vol. XV, Part 42, Gaptrop. p. 438, PL 27, fig. 2. 



Stat. 2. Madura-strait. 56 M. Grey mud with some radiolariae. i Spec. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. i Spec. 



Stat. 116. West of Kvvandang-bay-entrance. 72 M. Fine sand with mud. 5 Spec. 



The specimens are dead, bleached shells. 



14. Natica colliei Recluz. 



Recluz. Proc. Zool. Soc. Lond. 1843, p. 206. 



Philippi. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 70, PI. u, fig. 6. 



Reeve. Conch. Ic. Vol. IX, Natica, fig. 112. 



Tryon. Man. of Conch. Vol. VIII, p. 26, PI. 7, fig. 34. 



Stat. 99. North-Ubian, Sulu-archipelago. 16 — 23 M. Lithothamnion-bottom. I Spec. 



15. Natica hiriasensis Recluz. 



Recluz. Proc. Zool. Soc. Lond. 1843, p. 212 (buriasiensis). 



Philippi. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 133, PI. 18, fig. 17. 



Reeve. Conch. Ic. Vol. IX, Natica, fig. 128. 



Tryon. Man. of Conch. Vol. VIII, p. 29, PI. 8, fig. 58. 



