169 



more dilated than in the last) terminating in a small 

 umbilicus ; body whorl not carinated. . Devon, on 

 Algce. 



T ARMATUS. D. p. 829. (young.) T. CALCAR. 

 Mont. Sup. p. 137. t. 29. / 3. Ch. f. 1786,7. 

 DELPHINULA C. F. p. 312. Whorls four, the upper 

 ones depressed and forming a flat summit ; pale pink, 

 round, with large smooth lanceolate spines, radiating in 

 straight lines from the body "and part of the second 

 whorls, about thirteen in number ; base convex, with 

 a central cavity ; aperture orbicular, i. lona. 

 Possibly a young Ruyows. 



T. DECUSSATUS. Mont. p. 322. t. 12. /. 4. F. p. 

 299. An T. PELLUCIDUS. Lin. T. 3. p. 66. t. 13./. 

 33,4.? T. ARENARIA. D. p. 839. Subpellucid, 

 somewhat glossy, white, the apex not very pointed; 

 whorls five, rounded, well defined, strongly striated 

 longitudinally and decussated by extremely fine striae ; 

 aperture suboval, contracted above, outer lip thin, inner 

 lip not spreading. &... 0,0 12. Salcomb Bay, rare. 



T. MARGARITA. Lowe, in Z. J. 2. p. 107. t. 5.f. 

 I0,ll.F.p. 299. HELIX M. Mont. Sup. p. 143. 

 ~-Wern. Mem. 1, p. 408. t. 8. /. 5, MARGARITA 



H. 



