268 MONILEA-MINOLIA. 



the carina acute, crenulated ; last whorl angulated, tricarinate, the 

 lower carina less acute, surrounding the funnel-shaped, deeply longi- 

 tudinally and spirally striated umbilicus, strongly crenated, bounded 

 by an impressed line ; two upper carina acute, separated by cou- 

 cavo-flaL interspaces. Aperture suboblique, rounded ; peristome 

 acute, not expanded nor reflexed. Alt. 4*, diam. 4 mill. (A^icey.) 



Sumatra. 



This curious form was discovered by Capt. Martin, in 1842, on 

 the coast of Sumatra. It is allied to the Solariella solariiformis 

 Hani, of Cochin (Malabar), but is more elevated, more acuminate, 

 more angular than the latter, etc. (Ancey). The types are in the 

 collections of Schaufuss, Jousseaume and Ancey. 



Solariella turritellina C. F. Ancey, Le Naturaliste, iii, p. 390, 

 April, 1881. (Paris.) 



M. L.EVissiMA Von Martens. TJnfigured. 



Shell broadly umbilicated, depressed conoidal, sculptured with 

 very fine, hardly visible spiral stride, otherwise smooth, very shin- 

 ing, ashen-whitish, painted with yellowish confluent flammules above 

 and at umbilicus; whorls 5 A, slightly convex, separated by simple 

 sutures, the last subplanate at base ; umbilicus cylindrical ; aperture 

 diagonal, rounded-trapezoidal, peristome simple, incomplete, the col- 

 umellar margip straightened, forming an obtuse angle wdiere it joins 

 the basal lip. 



Alt. 8, diam. raaj. 13, min. 11 mill. ; aperture, alt. 7, diam. BA mill. 

 {Mart.) 



Sotith Africa, 33° 59' s. lat. ; 50 ft. depth. 



Troehus kevissimus Mart., Sitzungsb. Gesellsch. naturf. Freunde, 

 1881, p. 65. 



Recalls the wide-umbilicated forms of Northern Margarita, but 

 is easily separated from them by the beautiful marking. This and 

 the almost perpendicularly entering umbilicus shows likeness to the 

 subgenus Minolia., but the umbilicus of our snail is not encircled by 

 a callous. Operculum thin, horny, with 6-7 whorls. {Martens.) 



[The following six species form a little group to which I gave the 

 name Conotrochus. I believe the species to belong to 3Iinolia.^ 



M. MARiEi Fischer. PI. 35, fig. 11. 



Shell minute, narrowly but profoundly umbilicated, conical- 

 turrited ; whorls 7, convex, separated by deep sutures ; the first 



