382 PLIOCENE MOLLUSCA. 



Mr. A. Bell in his St. Erth paper (op. cit.) as being in the Sedgwick Museum, 

 Cambridge. I feel very grateful to my friend, the late Prof. Hughes, that I have 

 been entrusted not only with them but with so many other valuable shells. Our 

 fossil approaches some figures of the M. angusta of Jan, not published by the author 

 but subsequently. It differs sufficiently, however, from those given by Bellardi 

 and others not to be referred to that species, and I have little hesitation in 

 supporting Wood's view that it should be considered distinct. 



Mangilia Gwynii (Etheridge and Bell). Plate XXXIX, fig. 24. 



1898. Pleurotoma (Mangilia) Gwynii, A. Bell, Trans. Roy. Geol. Soc Cornwall, vol. xii, p. 136. 



Specific Characters. — Shell minute, slender, fairly solid, spindle-shaped ; whorls 

 6, convex ; ornamented by strong, rounded, sinuous and oblique longitudinal 

 costas, and on the upper whorls by coarse inconspicuous spiral striae ; mouth 

 comparatively long, narrow, angulated above ; canal short and open ; apex and 

 nucleus smooth. 



Dimensions — L. (3 mm. B. 2 mm. 



Distribution — Not known living. 

 Fossil : St. Erth. 



Remarks. — This little shell, which Mr. Bell believes to be the only perfect 

 specimen of the kind that has been obtained, is now in the British Museum; it was 

 described by him in 18'J8 on the authority of Dr. Gwyn Jeffreys as a new species. 



Genus RAPHITOMA, Bellardi (continued from p. 276). 

 Raphitoma concinnata (S. V. Wood). Plate XXXIX, figs. 3, 4. 



1848-72. Clavatula concinnata, S. V. Wood, Mon. Crag Moll., pt. i s p. 61, pi. vii, fig. 11a, 1848; 

 Pleurotoma hispidula, 1st Suppl., pt. i, p. 42, pi. iii, fig. 3, 1872. 



1871. Pleurotoma deciissata, Jeffreys in Prestwich, Quart. Journ. Geol. Soc, vol. xxvii, pp. 143, 487. 



1872. Pleurotoma concinnata, A. and E. Bell, Proc. Geol. Assoc, vol. ii, p. 210. 



Specific Characters. — Shell turreted, subfusiform ; whorls 7, distinctly convex ; 

 slightly compressed above, especially on the last; ornamented by about 15 strong 

 flexuous costoe which tend to die out towards the base of the shell, and by fine 

 inconspicuous spiral ridges ; suture rather deep ; spire elongate, regularly 

 diminishing in size ; mouth ovate, angulate above ; sutural sinus distinct but not 

 deep ; outer lip gently curved, with a sharp edge ; inner lip forming a thin 

 glaze on the pillar ; columella with a swelling in the middle of the mouth and a 

 slight umbilical chink near the base. 



