209 



finely striated spirally ; mouth equal to four-fifth's" of 

 the shell, triangular, inside polished white, lip broad 

 and thin, 6... 4. N. Ireland, most rare. 



GENUS. TRICHOTROPIS. SOWERBY. 

 Ovate-fusiform, with the apex pointed ; the aperture 

 ovate, with a short oblique narrow canal, the outer 

 lip thin and denticulated, the inner reflexed but 

 leaving exposed a rather large umbilical groove. 

 1. UMBILICATUS. Macgy. Aberd. p. 330. Fusus 

 U. Brown in Wern. Mem. 8. p. 98. t.l.f. 2. TR. 

 ACDMINATTJS. Malac. Mag. Annals Nat, H. 8. 

 Ovate-turreted, white or reddish white, with fine deeply 

 impressed oblique striae ; whorls convex, seven, ob- 

 liquely flattened above, longitudinally marked with fine 

 but deep striae and spirally with compressed rounded 

 strong ribs, six or seven on the very large and ventricose 

 body whorl, between each pair of which is a smaller 

 and three small ones near the distinct suture ; spire 

 slender; aperture ovate, broader behind, canal very 

 small and oblique, inner lip reflexed but not concealing 

 the umbilicus from which a groove extends nearly to 

 the canal. 0,58... 1. Aberdeen, fyc. 



GENUS. MUREX. 

 Oval or oblong, canalicvlated at the base; with external 



