ART. 22 MIOCENE GASTROPODS AND SCAPHOPODS MANSFIELD .31 



Genus CANCELLARIA Lamarck 



CANCELLARIA SPRINGVALEENSIS, new species 



Plate 2, fig. 12 



Shell of medium size, solid, strongly axially and spirally sculp- 

 tured and consists of two and one-half nuclear and four postnuclear 

 whorls. Nucleus smooth, naticoid, whorls rapidly enlarging, initial 

 turn minute. Postnuclear whorls strongly shouldered and mod- 

 erately tabulated in front of the channeled suture. Axial sculpture 

 of (12 on the penultimate whorl) rounded, rather narrow, retrac- 

 tive ribs, extending posteriorly nearly to the suture : ribs becoming 

 nearly obsolete over the body whorl on reaching the base; spiral 

 sculpture of two slightly weaker bands over the slope below the 

 suture and of four stronger, widely spaced, flat bands extending 

 from the periphery forward to the suture — the one at the periphery' 

 is slightly stronger and seminodulous at the intersection with 

 the ribs; body whorl with 14 spiral bands, with intercalations of 

 about twice their width. Aperture rather narrow, hemispherical; 

 outer lip with a strong varix behind and near the margin, within 

 ornamented with 11 sharp lirae; parietal wall w^ith a thin wash 

 of callus insufficient to conceal the spirals. Columella triplicate, 

 posterior one sharp and strong, nearly horizontally placed and ex- 

 ternally continuous with the posterior border of the fasciole; ante- 

 rior two obliquely placed, anterior one continuous with the inner 

 margin of the canal. Between the two posterior plications, three 

 short plications intervene. Siphonal fasciole separated from the 

 pillar plate by a small chink and is overrun by three or four 

 spiral threads. 



Dimensions: Type (U. S. Nat. Mus. Cat. No. ?>52662) measures: 

 Altitude 21 mm.; greatest diameter 13 mm.; length of aperture 11 

 mm. ; width 4 mm. 



The species is founded upon a single specimen. The new species 

 here described closely resembles C. paramioorei Gardner (Ms.) from 

 the Chipola marls, Florida. C. paramoorei, has a more inflated body 

 whorl and possesses slightly heavier ribs, especially on the earlier 

 whorls — otherwise it is very similar. It less closely resembles C. 

 moorei Guppy, a species described from the Bowden marls of 

 Jamaica. 



Occurrence. — Upper Miocene : Springvale, near Couva, Trinidad. 



CANCEI.LARIA BULLBROOKI. new species 



Plate 5, fig. 3 



Shell small, rather slender, strongly constricted at the suture and 

 consists of two and one-half nuclear and three and one-half post- 



