DIJNDET GASTEROPODA. 51 



TURBO SHALERI, n. sp. PL 2, fig. 3. 



Heiglit, 12 mm. Greatest breadth, 20 mm. 



Shell depressed, wider than long: spire little elevated: 

 umbilicus open and deep. "Whorls embracing, angular, two- 

 keeled ; the widest part of the whorls at the upper keel, so that 

 the outline of the space between them is oblique to the axis of 

 the shell. 



The whole surface is ornamented with numerous rows of small 

 tubercles, disposed in longitudinal and oblique transverse lines. 

 These are of the same size on the keels as the rest of the surface. 



Umbilicus surrounded with radiating short costse or 

 lengthened tubercles. 



Dedicated to Professor Shaler, of Cambiidge, U.S., whose 

 companionship I have enjoyed along the Avon-section and in the 

 Alps. 



There are three specimens in the Museum. 



Locality — Dundry. Inf. Ool. 



TEOCHUS SAN^DERSIT, n. sp. PL 2, fig. 4. 



Height, if complete, 17 mm. Greatest breadth, 16 mm. 



Shell conical, acute, widely umbilicate. Last whorl with two 

 keels, the superior one projecting considerably beyond the other, 

 so that there is the widest part of the shell : whorls with 

 numerous transverse costae oblique in direction and with longi- 

 tudinal lines ; where these cross are raised tubercles, so that the 

 whole surface of the shell is scabrous. The costse where they 

 cross the keels form elevated sharp tubercles. 



The umbilicus is surrounded with a row of elevated crests, 

 from which costse radiate over the base of the last whorl, and on 

 the other hand are continued within the open umbilicus. 



This shell has some resemblance to Trochus hmrtus, Phill. 

 (non T. hiserratus, Goldf., pi. 178, fig 11) which wants however 

 the second keel. The wide umbilicus distinguishes it from T. 

 s, H. and J). (BuU. Soc. Linn, l^oim. Y., p. 213.) 



