3- TrocJnis (Laviprostoma) maculafus Linne. 



LiNNE. Syst. Nat. Ed. X, p. 756, N" 502. 



RUMPH. Amb. Rariteitkamer, p. 74, fig. C ?, 5. 



KlENER. Coq. Viv. Vol. X, Trochus, p. loi, PL 29, fig. i, la. 



Reeve. Conch. Ic. Vol. XIII, Trochus, fig. 4 and 66 [smaragdus). 



PiLSBRY. Man. of Conch. Vol. XI, p. 24, PI. 9, fig. 94, 100, i, 2, 3. 



Stat. 33. Bay of Pidjot, Lombok. 22 M. Coralsand. i Spec. 



Stat. 131. Beo, Karakelang-islands. Reef, i Spec. 



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



Stat. 231. Amboina. Reef. 2 Spec. 



Stat. 250. Kilsuin, West coast of Kur-island. 20 — 45 M. Coral and Lithothamnion. i Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to 36 M. Sand, i Spec. 



The specimen from Stat. 131, is the only quite typical one, with nearly straight outlines 

 and a sharp keel; the other specimens show some affinity to the next variety and to T. ver- 

 riLcosiLS Gmel., which, according to Pilsbry belongs to this species. Indeed it is very difficult, if 

 not impossible, to classify every specimen of a rather large series, if one admits many species. 



var. graiiosiis Lamarck. 



Lamarck. An. s. vert. Ed. Desh. Vol. 9, p. 137. 



KlENER. Coq. Viv. Vol. X, Trochus, p. 103, PI. 34, fig. I. 



Reeve. Conch. Ic. Vol. XIII, Trochus, fig. Qj [gibberuliis). 



Pilsbry. Man. of Conch. Vol. XI, p. 26, PI. 6, fig. 51, 60, PL 9, fig. 4. 



Stat. 131. Beo, Karakelang-islands. Reef i Spec. 

 Stat. 225. Lucipara-islands. Reef. 11 Spec. 

 "'Amboina. 2 Spec. 



The specimen from Stat. 131 seems to belong to the form ca.\\e.A gidder^t his by Adams, 

 it is higher, the altitude being 43 Mill., with a diameter of 37 Mill. Even those from Stat. 225, 

 are higher in proportion to their diameter, like the figure of Kiener, copied by Pilsbry ; in only 

 one specimen, not quite adult, the altitude is surpassed by the diameter. 



4. Trochus (Lamprostoma) incrassahis Lamarck. 



Lamarck. An. s. vert. Ed. Desh. Vol. 9, p. 138. 



Reeve. Conch. Ic. Vol. XIII, Trochus, fig. ^j} 



Kiener. Coq. Viv. Vol. X, Trochus, p. 113, PL 37, fig. i. 



Pilsbry. Man. of Conch. Vol. XI, p. 26, PL 6, fig. 48, 49 (50?). 



Stat. 40. Pulu Kawassang, Paternoster-islands. Reef, i Spec. 

 ■■Amboina. i Spec. 

 ■■■'Java, 3 Spec. 



The specimens agree very well with the figures and description of Fischer in Kiener's 

 Coq. Viv., copied by Pilsbry; much less with Reeve's figure "]"] (Pilsbry, fig. 50) the outlines 

 of the spire in these figures, not being convex. Perhaps these figures represent another 

 allied species. 



38 



