250 MONILEA. 



T. mtiligineus MKE. Moll. Nov. Holl., p. 18. PHILIPPI, Conchyl. 

 Cab., p. 176, t. 28, f. 2. FISCHER, Coq. Viv., p. 397, t. 118, f. 3. 

 Mtnolia vitiliginea ANGAS, P. Z. S. 1865, p. 182 ; I c. 1867, p. 217. 

 T. vitiligineus LISCHKE, Jap. Meeres Conchyl. ii, p. 86. Marga- 

 rita nitiligineus A. AD., P. Z. S. 1851, p. 190. Trochus (Solariella) 

 ritiligineus WATSON, Challenger Gasteropoda, p. 72. 



I have seen no specimens which I can refer with certainty to this 

 species. I think it possible that Fischer has wrongly identified it. 

 This species and the last should be critically compared and investi- 

 gated by some naturalist who has abundant material. The entire 

 genus Monilea is very much in need of a more thorough revision 

 than the limited material before me allows me to attempt. 



T. mtiligineus may belong in Minolia. 



M. WARNEFORDI G. & H. Nevill. PL 41, figs. 12, 13. 



Shell flatly conoidal ; whorls 6, angular, spirally ribbed with 

 rather distant, slightly undulating costulations, keeled at the periph- 

 ery ; on the angle of the last whorl a row of slightly raised transverse 

 undulations, giving the shell a coronated appearance ; brown irregu- 

 larly and minutely reticulated with white ; base smooth, glabrous, 

 closely ribbed, ribs somewhat superficial, flat, with a smooth thick- 

 ened callosity round the umbilicus, forming a tooth on the margin 

 of the columella ; interior of the aperture barely striated. The 

 only species at all resembling this fine shell are Monilea ricjata Phil., 

 M. callifera Lam. (also found in our Indian seas), and our M. 

 masoni; it can, however, be easily distinguished from all of them 

 by the above characters. Alt. 9*, diara. 13-1 mill. (Nevill.') 



Andaman Is. 



Trochus (Monilea) warnefordi NEVILL, Journ. Asiat. Soc. Bengal 

 1874, p. 27, t. 1, f. 2. 



C. BELCHERI Philippi. PI. 61, figs. 3, 4. 



Shell depressed-conoidal, umbilicate, thin, sharply transversely 

 lirate, white, painted with scattered red dots and a few larger red 

 spots ; whorls convex, separated by a subcanaliculate suture, the last 

 rounded ; umbilicus surrounded by a peculiarly reddish colored 

 callous ; aperture subrhomboidal ; columella nearly perpendicular, 

 incised at base. (Phil.} 



A very handsome species. The shell is rather thin, somewhat 

 depressed ; the whorls are strongly convex, especially at the sutures, 

 Avhich are therefore almost channelled ; the last is well rounded. 



