2 I 7 



Philippi and Reeve have held this species separate, Tryon unites it to die precedino- 

 species. Troschel (Gebiss der Schnecken, p. 183) found no valuable differences between the 

 radulae, but conchologically the species is easily recognizable. 



34. Natica (Mamilla) simiae Deshayes. 



DESHAYES in Lamarck. An. s. vert. Ed. Desh. Vol. VIII, p. 652. 



Philippi. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 35, PI. 4, tig. 17. 



Reeve. Conch. Ie. Vol. IX, Natica, fig. 76. 



TRYON. Man. of Conch. Vol. VIII, p. 51, PI. 21, fig. 19, 20. 



Stat. 66. Bank between Bahuluwang and Tambolungan. 8 — 10 M. Dead coral. 1 Spec. 



Stat. 164. i°42'.5 S., I30°47'.5 E. Halmahera Sea. 32 M. Sand, small stones and shells. 1 Spec. 



Stat. 279. Rumah-Kuda-bay, Roma-island. 36 M. Mud and sand. 1 Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to t,6 M. Sand, coral and mud. 1 Spec. 



The specimens are small, probably young, they may be easily recognized by the 

 waved streaks. 



35. Natica (Mamilla) filosa Sowerby. 



SOWERBY in Reeve. Conch. [c. Vol. IX, Natica, fig. 72. 

 TRYON. Man. of Conch. Vol. VIII, p. 51, PI. 22, fig. 22. 



Stat. 33. Bay of Pidjot, Lombok. Up to 22 M. Mud, coral and coralsand. 1 Spec. 



Stat. 47. Bay of Bima. 55 M. Mud with patches of fine coralsand. 1 Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to 36 M. Sand coral and mud. 1 Spec. 



The specimens are young but easily recognizable by the spiral striae. 



36. Xatica (Mamilla) maitra Bruguière. 



Bruguière. Encycl. Meth. p. 453, fig. \a, b. 



Philippi. Martini-Chemn. Conch. Cab. Ed. II, Vol. II, Natica, p. 58, PI. 9, fig. 6. 



REEVE. Conch. Ie. Vol. IX, Natica, fig. 25. 



Tryon. Man. of Conch. Vol. VIII, p. 51, PI. 22, fig. 24. 



Stat. 47. Bay of Bima. 55 M. Mud with patches of fine coralsand. 1 Spec. 



One very young specimen. 



l~j . Natica (Amauropsis) apora Watson. 



WATSON. Voy. of H. M. S. Challenger, Zoology, Vol. XV, Part 42, p. 454, PI. 27, fig. 11. 



Stat. 48. 8°4'.7 S., u8°44'.3 E. Flores Sea. 2060 M. Fine grey mud, partially green. 1 Spec. 



Stat. 52. 9°3'.4S., U9°56'.7E. Savu Sea. 959 M. Globigerina ooze. 1 Spec. 



Stat. j6. 4°22.i S., ii8°i6'.9E. Makassar Strait. 2029 M. Fine grey mud. 3 Spec. 



Stat. 271. 5°46'.7 S., i34°o'E. Arafura Sea. 1788 M. Bluish green mud of a uniform appearance. 



2 Spec. 

 Stat. 300. io°4S'.6S., i23°23'.i E. Timor Sea. 918 M. Fine, grey sand. 2 Spec. 



The specimen from Stat. 48 is much larger than Watson's figure, its altitude being 

 27 Mill.; one specimen from Stat. 271 has the umbilicus not quite closed, but as the columellar 



109 



