352 



continued as a large brownish zone at the centre of last whorl. Whorls 7, of which 3 form a 

 smooth nucleus, with rather convex whorls, subsequent whorls very convex, with a deep suture, 

 biangular by 2 prominent spiral lirae. Sculpture consisting of concentric ribs, 12 on last whorl, 

 of which the labial one is thicker; these ribs are crossed by spirals, of which the upper one 

 of the upper whorls, continues as an angle on the last whorl, with 4 thinner lirae above and 16 

 below it, 3 of them are more prominent on last whorl, and 3 strong ones near the base are 

 granulous; this sculpture is crossed by fine growth-striae and small scales near the suture. 

 Aperture ovate, obtusely angular above, with a short canal below, directed to the left; interior 

 of aperture with 6 short folds, the peristome is regularly arched, columellar margin smooth. 



Alt. 8, lat. 4; apert. alt. (with canal) 3^.1, lat. lY^ Mill. 



This species is closely allied to the preceding one, it differs however in size, in colour, 

 in shape, by its less conspicuous canal, by its larger number of ribs, more prominent lirae and 

 the want of laminar striae, by the lirae of aperture (however this character may depend on 

 age, perhaps the peristome of U. Sinithi was not quite developed). After all I should not be 

 surprized if with more materials the 2 forms must be united. 



Maculotriton Dall. 

 I. Maculotriton digitalis Reeve. 



Reeve. Proc. Zool. Soc. Lond. 1844, p. 12. 



• Conch. Ic. Vol. II, Triton, fig. 86. 



KOBELT. Martini-Chemn. Conch. Cab. Ed. II, Vol. Ill, Triton, p. 256, PI. 68, fig. 17, 18. 

 Tryon. Man. of Conch. Vol. Ill, p. 29, PI. 15, fig. 142, 143. 



Stat. 129. Near Kawio- and Kamboling-islands, Karkaralong-group. Reef, i Spec. 



Stat. 259. 5°29'.2S., I32°52'.5E. Near Kei-islands. 487 M. Coralsand and dead coral, i Spec. 



By the more recent researches of Pilsbry and Vanatta (Proc. Ac. Nat. Sc. Philadelphia 

 1904, p. 592, 593) it has been made out that this species and its congeneers have a muricoid 

 radula, allied to that of Ocinebra. 



Purpura Bruguiere. 



I. Ptirpura (Thalessa) hippocastamim Linne. 



LiNNE. Syst. Nat. Ed. XII, p. 12 19. 



KlENER. Coq. Viv. Vol. VII, Purpura, p. 52, PI. 12, fig. 33. 



Reeve. Conch. Ic. Vol. Ill, Purpura, fig. 34. 



KiJSTER. Martini-Chemn. Conch. Cab. Ed. II, Vol. Ill, Purpura, p. 182, PI. 31, fig. 3 — 5. 



Tryon. Man. of Conch. Vol. II, p. 162, PI. 45, fig. 42, 43. 



Stat. 34. Labuan Pandan, Lombok. Coralreef. 2 Spec. 



Stat. 37. Sailus ketjil, Paternoster-islands. Reef and 27 M. Coral and coralsand. 4 Spec. 



Stat. 40. Pulu Kawassang, Paternoster-islands. Coralreef. 3 Spec. 



Stat. 152. Wunoh-bay, N.-W. coast -of Waigeu-island. Reef and 32 M. Lithothamnion. 2 Spec. 



This species varies much, however the specimens belong more or less to the typical 

 form, rather than to the named varieties. 



106 



