54 



MOLLUSCA 



Hippocrenes 



ROSTELLARI.4 



and 300. Strombtu amplus, Brander, p. 76 

 macropterus, Moiitfort, II. p. 523. 



Sliell fusiform, smooth; spire taper, acute, the sides of which 

 are flat, consisting of from ten to fourteen volutions, defined 

 only by ttie suture line, anil tcrniinatiiiir in a sharp apex ; aper- 

 ture oblong-ovate, much contracted, and acute above and below ; 

 inner lip smooth, shining, very broadly reflected on the colu- 

 mella, extending over three-fourths of the body in front, and in 

 some instances with a second and more thickened reflection (as 

 in fig. 1 8) spreading entirely around the base, and extending to 

 the point of the beak; outer lip very large, spreading, and semi- 

 circular, in the form of an expansive wing, extending in some 

 instances from the fifth or sixth volution of the spire, encom- 

 passing the apex, and projecting considerably beyond the spire; 

 at the upper junction of the two lips there is a variously bent 

 and long canal, which is sometimes nearly concealed by a reflec- 

 tion of the superior portion of the outer lip ; beak short and 

 pointed, extending a little way beyond the lip, with a contracted 

 canal. 



This shell is subject to much variety in form ; in some specimens 

 the external edge of the outer lip is provided with a deep sinus in 

 the upper part which separates it from the canal near the spire, as 

 in fig. 18. In young shells there is no development of the outer 

 lip, and they may be in consequence mistaken for a Fusus, as in fijr. 

 19. Its sides are nearly parallel, and its surface very smooth and 

 shining. 



Found in the London Clay at Hordwell and Highgate. 



SECTION II. — SHELLS Tl'RRETED, OUTER LIP SINUATED. 



2. R. PES PELiCANi The Pelican's Foot Rostellaria, pi. 



XXXIII. fig. 16. 



Jioslellaria pes pelicani. Parkinson, Org. Rem. III. p. 63. 

 Lamarck, An. San. Vert. VII. p. 193. Sowerby, Min. Conch. 

 VI. p. 109, pi. 5.")8, fig. 1. Fleming, Brit. An. p. 359. Slrom- 

 htis pes pelicani, Linn. Syst. Nat. II. p. 1207. Mont. Test. 

 Brit. p. 253. Brown, Illust. Brit. Conch, pi. 5, fig. 21, 39. 



Spire pyramidal, tapering to a fine point, and consisting of 

 eight or ten transversely ribbed and carinated volutions, termi- 

 nating in an acute apex ; body volution with two rows of tuber- 

 cles placed upon the keels ; outer lip greatly expanded and 

 quadrifid, its upper angle extending high upon the spire ; base 

 ending in a short acutely pointed beak with a shallow canal in 

 its centre. 



This species varies considerably as to the development of the 

 outer lip, and presents very different aspects in its progress from 

 the young to the adult condition. 



Discovered in a ('lay pit at Tottenhill, near Lynn, Norfolk ; 

 it has also been met with in the Suffolk Crag and at Swaffham. 



3. R. Pabkinsoni. — Parkinson's Rostellaria, pi. XXXIII.* 

 fig. 12, 13, 14, 15. 



Rostellaria Parkinsoni. Sowerby, Min. Conch. IV. p. 69, 

 pi. 349, fig. 1 to 5. lb. VI. p. 112, pi. 558, upper fig. 3. lb. 

 Geo. Trans. IV. 2nd scries, p. 344, pi. 18, fig. 24. Manlcll. 

 Geo. of Sussex, p. '2, 82, and 108. Fleming, Brit. An. p. 360, 

 Rostellaria having only one spur-like process, Parkinson, Org. 

 Rem. III. p. 63, pi. 5, fig. II. 



Shell turreted, with numerous oblique, long longitudinal ribs, 

 and transversely striated ; the lower volution of the spire, 

 ribbed and obscurely carinated ; outer lip considerably ex- 



panded, with but one large, subulate, spuf-like process, directed 

 upwards, with a broad, angular expansion under it ; aperture 

 elongated and narrow; beak long, subulate, and pointed; the 

 canal very narrow beneath. 



Found at Blackdown, Favcrshani, in the Green sand and 

 Gray Chalk Marie. 



4. R. FiTTONi— Fitton's Rostellaria, pi. XXXIII.' fig. 10. 

 Rostellaria Parkinsoni. Sowerby, Min. Conch. VI. ]>. 1 12, 



pi. 558, lower fig. 3. 



Shell turretted ; body and spire nearly of equal length ; spire 

 consisting of six somewhat flattened volutions ; and with nume- 

 rous longitudinal, somewhat oblique ribs ; body with a carina 

 near its upper extremity ; lip expanded, the carina crossing it 

 behind, and some longitudinal wrinkles near its margin ; beak 

 short and nearly straight. 



Found at Feversham. 



5. R. Macuostoma The Long-mouthed Rostellaria, pi. 



XXXIII.'fig. 11. 



Rostellaria macrostoma. Sowerby, Geo. Trans. IV. 2nd 

 scries, p. 344, pi. 18, fig. 23. 



Shell turreted ; body large ; spire short, consisting of four or 

 five rounded carinated volutions, five on each, the centre one 

 the most prominent ; aperture small, round ; outer lip greatly 

 expanded and flattened, provided with two lobes; beak curved. 



Found in the Green sand of Blackdown. 



6. R. BISPINOSA. — TheTwo-spined Rostellaria, pi. XXXIII. 

 fig. 14. 



Rostellaria hispinosa. Phillips, Geo. of Yorkshire, I. p. 107, 

 pi. 40, fig. 32, and pi. 6, fig. 13. 



Shell turreted ; spire consisting of seven deeply divided 

 volutions terminating in an acute apex, with an acute spiral 

 carina in their centre, which emanates from the superior portion 

 of the body ; and giving to the volutions a triangular form ; 

 beneath this on the body is another smaller keel; beak of 

 moderate length, and terminating in a sharp point. 



Found in the Lower Calcareous grit, and in the Kelloways 

 Rock, by Mr. Williamson, Scarborough. 



7. R. CARiNATA.— The Keeled Rostellaria, pi. XXXIII. 

 fig. 11, pi. XXXIII.' fig. 8. 



Rostellaria carinala. Mantell, Geo. of Sussex, p. 86, pi. 

 19, fig. 10, 1 1, 12, 14. Sowerby, Geo. Trans. IV. 2ud series, 

 p. 337, pi. 11, fig. 19. 



Shell turreted ; spire acute, nearly subulate, consisting of 

 eight or nine convex volutions, which are ornamented with a 

 series of regular rather elongated small tubercles, assuming 

 somewhat the aspect of ribs, in the centre of the spire ; body 

 provided with two carina; a little above its centre; whole shell 

 covered with minute spiral stria;; aperture ovate, contracted 

 both above and below, and ending in a wide canal; outer lip 

 furnished with a long, farcated jjrojettion, produced by an 

 elongation of the upper keel on the back of the shell ; beak 

 long and subulate. 



Found in the blue Chalk Marie, at Laughton, Ringmer, and 

 Norlington. 



8. R. COMPOSITA. — The CompositeRoslellaria, pi. XXXIII. 

 fig. 22. 



Rostellaria composita. Sowerby, Min. Conch. VI. p. Ill, 

 pi. 558, fig. 2. Phillips, Geo. of Yorkshire, I. p. 124, pi. 9, 

 fig. 28. 



