SOWERBY : NEW CANCELLAKIA. 27 



DESCRIPTION OF A NEW SPECIES OF CANCELLARIA FROM 



PENANG. 



By G. B. SowERBT, F.L.S., &c. 



Read July Uth, 1893, 



Cancellahia Eudeli : — Testa angustissime et obtecte umbilicata, 

 elongato-turrita, scalariformis, albida, dilute luteo-fusco tincta et 

 lineata; spira elongata, acuta; aufractus 7, embryonales 1^ loeves, 

 rotundati, sequentes acute angulati, costis validis elevatis ad angulum 

 acutis muniti, supra angulum planulati, infra angulum leviter convexi, 

 undique striis subtilissimis cancellati ; anfr. ultimus spiram paulo 

 brevier, infra medium carina angusta instructus ; columella biplicata, 

 plieis parvis, obliquis ; apertura subtrigona, fauce alba, baud lirata. 

 Long. 20, diam. maj. 9 mm. ^fl^J.— Penaug. 



An elegant scalariform sbell, witb a long turreted spire, 

 and sbarply angled whorls. The area between the angle 

 and the suture is broad and flattened, as in C. contabulata, 

 goniostonia and others of the group. The longitudinal 

 ribs are much like those of several others among the 

 costate species. The surface of the shell is very finely 

 cancellated by longitudinal and spiral striae, the spirals 

 becoming a little stronger as they cross the ribs. Below 

 the periphery of the body whorl there is a distinct keel, 

 such as is common to some species of the genus Scalaria 

 notably the European S. pseudoscalaris. Gancellaria 



There is only one species which seems to bear anything Endeli, n.sp. 

 like a close resemblance to C. J^udeli, viz., C. Angasi, 

 Crosse.^ With this species I am unacquainted, excepting fi'om the 

 figure and description of the single specimen in the collection of Mr. 

 Thomas of Brest : its habitat is unknown. Compared with this 

 (as far as I can make out without an examination of the specimen) 

 C. Eudeli is one -fourth larger, has a proportionately longer and 

 sharper spire, and the area between the angle and the suture is 

 flatter, and not sloping, giving altogether a considerable difference to 

 the outline and general contour of the shell. 



This species may fairly be placed in the section to which Dr. 

 Jousseaume- has given the generic name Scalptia, but that author 

 has proposed to found another genus [Tribia) upon G. Angasi, 

 chiefly, if not solely, upon the ground of its being imperforate, 

 which I do not consider sufficient reason for the creation of a section, 

 much less of a genus. My species has an extremely narrow umbilicus, 

 almost entirely covered, but as apparent as in some specimens of 

 C. costifera and C. crenifera which latter species Dr. Jousseaume 

 includes in his genus Scalptia. 



1 " Journal de Conchyliologie," 1863, p. 65, pi. 11, fig. 8. 

 ^ " Le Naturalist," Paris, ann. ix., 1888, p. 213. 



