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growth and an impressed line below the suture. Colour yellowish-white, whorls about 3 a / 3 , 

 slightly convex, with a conspicuous suture. Aperture circular, peristome rather thick, separated 

 by a groove, from a subtriangular lobe at the upper part of the aperture, and from a tongue- 

 shaped callus covering the umbilical region ; around this callus, another larger, semicircular one 

 is separated by a groove, from the slightly depressed basal surface, this latter callus is grooved 

 by a few radiating striae. 



Alt. 2-/., diam. maj. 3, diam. of apert. 1 x / t Mill. 



2. Teinostoma sp. 



Stat. 297. io°39'S., I23°40'E. 520 M. Soft, groy mud. 5 Spec. 

 The largest of the specimens has a diameter of 3 Mill.; they are probably young and 

 could not be identified. 



Fam. Trochidae. 

 Trochus Linné. 



1. Trochus (s. str.) niloticus Linné. 



LiNNÉ. Syst. Nat. Ed. XII, p. 1227. 

 RUMPH. Amb. Rariteitkamer, p. 74, PI. 21, tig. A. 

 KlENER. Coq. Viv. Vol. X, Trochus, p. 66, PI. 10. 

 PlLSBRY. Man. of Conch. Vol. XI, p. 17, PI. 1, fig. 5—8. 



Stat. 53. Bay of Nangamessi, Sumba. Up to 36 M. Coralsand. 1 Spec. 

 Stat. 78. Lumu-Lumu-shoal, Borneo-bank. Shore. 2 Spec. 

 Stat. 129. Kawio and Kamboling-islands, Karakalong-group. Reef. 1 Spec. 

 Stat. 225. Lucipara-island. Reef. 1 Spec. 



Stat. 313. Dangar Besar, Saleh-bay. Up to 36 M. Sand. 1 Spec. 

 *Amboina. 1 Spec. 



The specimens from Stat. 78 contain Paguridae, that from Stat. 313 is the only adult 

 one, with expanded last whorl. 



2. Trochus (s. str.) fcncstratus Gmelin. 



Gmelin. Syst. Nat. Ed. XIII, p. 55S2. 



RUMPH. Amb. Rariteitkamer, p. 75, PI. 21, fig. 8. 



Reeve. Conch. Ie. Vol. XIII, Trochus, fig. 16, 17, 18 [exaltaties, crenulatus, fenestratus). 



KlENER. Coq. Viv. Vol. X, Trochus, p. 117, PI. 38, fig. 3. 



PlLSBRY. Man. of Conch. Vol. XI, p. 22, PI. 4, fig. 28, 29. 



Stat. 16. Bay of Kankamaraan, South coast of Kangeang. Shore. 2 Spec. 

 Stat. 81. Pulu Sebangkatan, Borneo-bank. 34 M. Coral and Lithothamnion. 1 Spec. 

 Stat. 93. Pulu Sanguisiapo, Tawi-Tawi-islands, Sulu-archipelago. 12 M. Lithothamnion. 1 Spec. 

 Stat. 142. Laiwui, coast of Obi-Major. Reef. 1 Spec. 

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

 Stat. 225. Lucipara-island. Reef. 1 Spec. 

 Stat. 240. Banda. 9 — 45 M. Lithothamnion. 1 Spec. 

 *Amboina. 1 Spec. 



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