M I T R A lugubris. 

 JVhite-handed Mitre, 



Generic Ciiauactkr. — See PI. 



Specific Character. 



M. testa inverse pyriformi, fused; sukis transversis intus punctatis; anfrac- 

 tibus supernc obsolete plieatis, fasciaque alba ornatis ; labia exteriore te- 

 nui, margine crenatd ; columella 4-plicatd ; basi alba, truncatd. 



Shell inversely pear-shaped, brown, with transverse sulcated grooves, 

 punctured within; volutions above obsoletely plaited and banded 

 with white; outer-lip tliin, margin crenated; pillar four-plaited; base 

 white, truncated. 



We have had much difficulty in the investigation of this spe- 

 cies : for its characters cannot be reconciled with any of those 

 contained in Lamarck's Monograph of the genus in the Annales 

 du Museum. With regard to the unnamed figures in the old au- 

 thors, it bears the closest resemblance to that of Gualtieri, 

 tab. 32. G, which Lamarck quotes for his M.crocata; but then 

 his description is not at all applicable to our shell ; and Mr. Dill- 

 vvyn's synonyms of the Linnean F. nodulosa (where he has also 

 included M. crocata), we are satisfied comprises two or even 

 three distinct shells. 



This was named by Dr. Solander fi^om the specimen in 

 Mr. G. Humphrys's collection here figured : it is exceedingly 

 rare, and its locality unknown. In form it resembles a Bac- 

 cinum ; the transverse grooves are broad, strongly defined, and 

 have large and deep excavated dots within them; the upper 

 part of each whorl has an appearance of irregular plaits, which 

 makes the suture uneven, and takes ofT something from the 

 smoothness of the lower part of the whorls, but the shell is in 

 no way granulated. 

 PI. 66. 



