215 



Stat. 172. Between Gisser and Ceram-Laut. Reef. 7 Spec. 

 Stat. 193. Sanana-bay, East coast of Sula Besi. Reef. 2 Spec. 

 Stat. 279. Roma. Reef. 1 Spec. 



In accordance with the majority of authors I have united this form to A r . aiirautia. 



27. Natica (Mam ma) pozvisiana Recluz. 



Recluz. Proc Zool. Soc. Lond. 1S43, p. 210. 



PHILIPPI. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 46, PI. 7, fig. 4. 



REEVE. Conch. Ie. Vol. IX, Natica, fig. 22. 



TRYON. Man. of Conch. Vol. VIII, p. 42, PI. 15, fig. 42. 



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



Stat. 71. Makassar. Up to 32 M. Mud, sand with mud, coral. 1 Spec. 



Stat. 116. West of Kwandang-bay-entrance. 72 M. Fine sand with mud. 1 Spec. 



The specimens are young, those from Stat. 47 and 116 are in fresh condition, with the 

 thin yellowish operculum. 



28. Natica (Mamma) suffusa Reeve. 



Reeve. Conch. Ie. Vol. IX, Natica, fig. 129. 



TRYON. Man. of Conch. Vol. VIII, p. 44, PI. 19, fig. 87. 



Stat. 37. Sailus Ketjil, Paternoster-islands. Up to 27 M. Coral and coralsand. 1 Spec. 

 Stat. 64. Kambaragi-bay, Tanah Djampeah. Up to 32 M. Coral, coralsand. 1 Spec. 

 Stat. 80. Borneo-bank. 50 — 40 M. Fine coralsand. 1 Spec. 



Unfortunately the only specimen from Stat. 80 is an empty shell. It agrees in every 

 respect with the figure and description of Reeve. I think Tryon was quite wrong in suggesting 

 that it should be a variety of N. mamilla Lin., it is sufficiently distinct by its apex, umbilicus 

 and colour. The locality recorded by the authors quoted above is New-Ireland. The specimens 

 from Stat. 37 and 64 are still more bleached, the violet colour being only perceptible on the spire. 



29. Natica (Mamma) mamilla Linné. 



Linné. Syst. Nat. Ed. N, p. 776, N° 627. 



RUMPH. Amb. Rariteitkamer, p. 76, PI. 22, fig. F. 



Philippi. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 31, PI. 4, fig. 7, 8. 



Reeve. Conch. Ie. Vol. IX, Natica, fig. 27. 



TRYON. Man. of Conch. Vol. VIII, p. 49, PI. 16, fig. 46. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. 1 Spec. 



Stat. 50. Bay of Badjo, West coast of Flores. Up to 40 M. Mud, sand and shells. 1 Spec. 



Stat. 86. Dongala, Palos-bay, Celebes. 36 M. Fine, grey mud. 3 Spec. 



Stat. 174. Waru-bay, North coast of Ceram. Reef. 1 Spec. 



Stat. 231. Amboina. 40 M. Coralsand. 2 Spec. 



Stat. 258. Tual, Kei-islands. 22 M. Lithothamnion, sand and coral. 1 Spec. 



Stat. ? 3 Spec. 



One specimen from Stat. 86, though about fullgrown, has the umbilicus still open, but 

 else it is quite typical. 



107 



