CALLIOSTOMA. 399 



spire very sleuder. Aperture subtriangular, iridescent and green 

 inside, columella short, vertical, abruptly dentate or trmwate at base. 



Alt. 9, diam. 6 mill. 



Mediterranean Sea, on the coasts of Corsica, Sicily, Tunis, Syi'ia ; 

 Adriatic Sea. 



T. uitidentatns PniL., Enum. jMoU. Sieil. ii, p. 150, t. 25, f. 8; 

 Conchyl. Cab., p. 91, t. 15, f. 13. — Weinkauff, Conchyl. des Mittel- 

 raeeres ii, p. 363.— Fischer, Coq. Viv., p. 279, t. ^\,tA.— T. frater- 

 culus MoNTS., Bull. Soc. Mai. Ital., 1879, p. 220. 



Distinguished from the jireceding by the slender spire, and very 

 abruptly truncated columella. 



Yar. fraterculum !Monts. is angular, sharply sculptured, the supra- 

 sutural ridge very strong; base broadei'; whitish, with gray 

 hieroglyphs. Tiniis. 



It is placed by AVatson in the synonymy of C. striatum Linne, on 

 the authority of Jeffreys. 



C. MONTA(;ui Wood. PI. 17, figs. 15, 16. 



Shell imperforate or very minutely perforate, conical ; whorls 7, 

 .a little convex, the earlier buff, following pale buffish-ashen, or- 

 namented with obscure maculations or zones of chestnut, obliquely 

 striate, spirally lirate, lirse on penultimate whorl 6. subequal ; last 

 whorl a little convex above, carin ited in the midde, convex beneath 

 and provided with 7-8 concentric, white-and-brown articulated 

 lirce ; aperture rhomboid, columella subtruncate below. 



Alt. 72, diam. 6 mill. (Fischer.) 



Atlantic and Mediterranean, England to Algiers. 



T. viontagui Wood, Index Test., Supj)l., t. 6, f. 43. — Ppiilippi, 

 Conchyl. Cab., p. 89, t. 15, f. 11. — Forbes & Hanley, Hist. Brit. 

 Moll, ii, p. 511, t. 65, f. 10, 11.— Fischer, Coq. Viv., p. 270, t. 89, 

 f. S.— Tr. montacuti Jeffr., Brit. Conch, iii, p. 320 ; v, t. 63, f. 1.— 

 Weinkauff, Conchyl. Mittelm. ii, p. 366. 



C. RUSCURIANUM Weinkauff. Unfigured. 



Whorls flat ; spiral ribs thicker than in C. viontagui, separated by 

 much narrower interstices ; umbilicus subperforate. 



Algiers ; Tunis. 



An unfigured species, closely related to C. montagui, perhaps a 

 variety of it. Included by Watson, on the authority of Jeffreys, as 

 a synonym of T. striatus Linn. 



