MITRA. 19 



247. retusa (f. 447, 8), Lamarck. — Including M. virgata 

 of Reeve, which must surely be the same. 



248. chrysalis (f. 437), Reeve. 



249. columbellaria (f. 660), A. Adams. 



250. paupercula (428, 9), Linnceus. 



251. zebra (f. 444, 5), Lamarck. — Much shorter and more 

 columbella-like than M. paupercula. 



252. ttgrina (f. 438), A. Adams. — A much more cylindri- 

 cal shell than M. pa upercula. 



253. luctuosa (f. 229, 406), A. Adams.— A small shell 

 with whitish line on the upper part of the whorls. The spire 

 is more pyramidal than others of the " coronata " group. 



254. marginata (f. 311), Sowerby. — Testa mitrceformis, 

 polita, spiraliter sulcata, spira aperturam longitudine sequanti, 

 anfractibus ad marginem fascia alba fusco maculata margi- 

 natis, apertura, superne subcontracts!, labio externo, infra- 

 crenulato. — Shell, mitre-shaped, polished, spirally grooved, 

 spire as long as the aperture, the whorls bordered with a 

 brown-spotted white band ; aperture contracted above, outer 

 lip crenulated below. 



255. plebeja (f. 605), Dorhi.—A more slender shell than 

 M. marginata. 



256. consolidata (f. 271), Sowerby. — A very stout 

 polished shell, much thicker aud broader than M. marginata, 

 and without the border. 



257. rutila (f. 221), A. Adams. — A beautiful orange- 

 coloured shell with a white, small spotted band on the upper 

 part of the whorls. 



258. perruginea (f. 15), Lamarck. 



259. adusta (f. 16, 17), Lamarck. 



260. ambigda (f. 5, 170), Swainson. 



