Inferior Oolife in Gloucestershire. 419 



(yQ. Ceritella sculpta ; small, turreted ; whorls few, long, nearly 

 flat, each with three encircling strise, equidistant ; the body-whorl has 

 six striae besides numerous others closely arranged at the base. 



Q7. Ceritella tumidula ; small, smooth, much lengthened ; whorls 

 flattened, but slightly tumid at their upper junctions, body-whorl 

 symmetrical ; length f inch. 



69. Scalaria pygmea ', shell minute; whorls seven, globose, the 

 last whorl much enlarged ; costaj eight in a volution. 



70. Solarium Cotswaldice ; depressed, both upper and under sur- 

 faces nearly equally concave ; sides rather flattened, but with the bor- 

 ders rounded and furnished with numerous longitudinal elevations or 

 nodules, twenty-eight upon the lower and twenty upon the upper 

 border of the last volution ; the entire surface has numerous narrow, 

 crenated, encircling costee, crossed by very fine longitudinal lines not 

 always distinct ; costae upon the sides of the last whorl about fourteen. 



74. Eulima parvula ; minute ; whorls five, convex, body-whorl 

 rather large ; apex obtuse. 



7^"^. Rissoina obtusa; spire obtuse; whorls slightly convex, six; 

 outer lip moderately large ; costse numerous, closely arranged, slightly 

 curved from right to left. 



77 to 89 inclusive. Cerithium ; the descriptions of the species of 

 this genus are omitted for the reasons given under the genus Sola- 

 rium, as are likewise oi Nerincea 93 to 97 inclusive. 



101. Fusus obliquatus; small, subcorneal, acuminated, longitu- 

 dinal ; costae about nine in a volution, passing obliquely from left to 

 right ; base with several large encircling striae, but the costae are not 

 continued to this part. 



102. Rostellaria unicornis 'y spire lengthened, composed of many 

 whorls, whorls costated, the costae terminating in knobs on their up- 

 per portions; costae ten in a volution, indented by five encircling 

 striae ; last whorl smooth, with a single prominent carina, having an 

 acute and elevated spire at one quarter of the circumference poste- 

 riorly from the outer lip ; the wing single, rounded, curved, slender 

 and produced ; caudal extremity moderately long. 



103. Rostellaria simplex ; smooth ; whorls long, few, convex ; the 

 spire moderately elevated ; body-whorl with two carinae, the upper 

 one the larger, and forming two angles in its course ; caudal extremity 

 short. Only casts have been procured, but they are well characterized. 



104. Rostellaria spinigera\ spire elevated, acute; whorls few, 

 each with seven prominent spines or spinous ribs ; body-whorl spined 

 above, grooved beneath; wing not digitated and but moderately ex- 

 panded ; caudal extremity straight and moderately long. 



105. Rostellaria solida ; spire turreted ; whorls five, angulated by 

 a circle of elevated longitudinal spinous ribs crossed by lines ; body- 

 whorl with a single carina, beneath which are several deep encircling 

 grooves ; wing simple, small, proceeding from the carina ; caudal ex- 

 tremity short. 



10(). Rostellaria gracilis ; spire lengthened, smooth; whorls six, 

 lengthened, angulated, the angle being in the middle of the whorl 

 forming an acute and crenulated carina ; body-whorl smooth, with two 



28* 



