32 TIARID.f:, 



formed into a succession of planes by tlie revolving ribs ; aperture 

 ovate, a little broadly effused below; the ribs form slight sulcations 

 within the aperture. Reddish brown, sometimes dark greenish- 

 brown ; internally white or light yelloAAish, the sulcations deep 

 brown. 



Alt. (eroded) 30, diam. 2'2 mm. 



Hah. Burma. 



53. Tiara (Acrostoma) pagodula [Gould). 



Tiara {Acrostoma) par/odida (Gould), Proc. Boston See. Nat. Hist. 

 1847, ii, p. 219 ; Otia Concb. p. I'OO ; Reeve, Conch. Icon., lo, fig. 

 10 (as lo), H. & T., C. I. pi. 153, fig. 3. 



Original description : — Testa crassa sub-rhombea, turrita, 

 teniiiter striata, fusco-castauea, decoilata ; spira elevata, conica ; 

 anfr. 4 angulatis, angulo spiuis 6 robustis armato ; ultimo antice 

 sub-rostrato, et costulis ad 4 cincto ; apertura ovata, antrorsum 

 producta, fauce cserulescente, fusco-maculato. 



Alt. 38, diam. 22-5 mm. 



Eah. Thoungyin River, a branch of the Salwin. 



Subgenus MELANELLA. 



Melanella, Swainson, 1840, Treat. Malac. p. 341 : Nevill, llaud List, 

 pt. 2, p. 271. 



Type, Melania holandric FtTussac ; Austria-Hungary. 



Bange. S.E. Europe ; S. & E. Asia ; Malaysia. 



Orif/inal descri2^tion : — Obovate ; spire scarcely longer than the 

 aperture, which is entire ; inner lip much thickened its whole 

 extent. 



54. Tiara (Melanella) zonata (Benson). 



Tiara (Melanella) zonata (Benson), J. A. S. B. v, 1836, p. 747 ; 

 Philippi, Abbild. N. Conch, i, Melama,]A. 1, fig. 12; Reeve Conch. 

 Icon. pi. 31, sp. 217 : H. k T., C. 1. pi. 71, fig. 4 ; Nevill, Hand 

 List, pt. 2, p. 272. 



Original description : — Testa ovato-conica-laevi, longitudiualiter 

 striata, olivacea, zonis tribus brunneis fasciata, anfractibus leviter 

 convexis, suturis miiiime profundis ; apertura albida, ovato-oblonga, 

 infra subangulata. 



Alt. 21-25 mm. 



Bab. North-East Frontier of Bengal ; Sylhet. 



55. Tiara (Melanella) riqueti {Grateloup). 



Tiara {Melanella) riqueti (Grateloup), Trans. Lin. Bordeaux, xi, pi. '>, 

 fig. 28 ; II. & T., C. I. pi. 71, fig. 10 ; Brot, in Conch.-Cab. 1877, 

 p. 333, pi. 34, figs. 6, G a. 



