PURPURINA (EUCYCLOIDEA). 97 



angulatus, Mi'mst. (' Goldf. Petref.,' t. 194, f. 5), a fossil of the Murchisonce-zone iden- 

 tified by Oppel with P. patroclus, D'Orb. (' Ter. Jur.' 2, pi. 329, figs. 9—11). As 

 a temporary name I propose that our shell be called " Purjpurina fusiformis." It 

 belongs to the Woodwardian Museum, and is marked " Yeovil." Hence I presume 

 it is a fossil of the Lower Division of the Inferior Oolite. 



16. Pubpueina (Eucycloidea) caeino-cbenata, Lycett, 1853. Plate II, figs. 7 a, b. 



1853. Fusns? CAEiNO-CEENATUS, Lycett. Proc. Cotteswold Nat. Field Club, 



vol. i, p. 81. 



Description — " Shell small, fusiform ; spire of four volutions, keeled and 

 striated; an elevated carina encircles the middle of each whorl, its edge undu- 

 lated or crenulated; encircling strise cover the whole surface of the shell, and there 

 is an indistinct circle of nodules upon the upper portion of each whorl near the 

 junction." — Lycett. 



The specimen now figured answers to the above description, except that 

 possibly the spire may have had five whorls. It evidently belongs to the same 

 section of Purpurina as P. Manor, but obviously differs in the smaller spiral angle, 

 and in possessing a more defined base (not well shown in Fig. 7 a, b) ; in fact, the 

 body-whorl may be regarded as distinctly bicarinate. The character, though not 

 the details of the ornamentation, are similar. With " P. fusiformis" it has closer 

 affinities, but the Cotteswold shell is much feebler. 



This specimen is from the Lycett Collection in the Jermyn Street Museum, 

 and is the only one known to me. The author quotes the species from the 

 Inferior Oolite of Minchinhampton (op. cit., p. 73). 



Some other small fossils from the Inferior Oolite have lately turned up which 

 may belong here, but at present it seems safer to reserve these to be dealt with 

 subsequently, either by way of postscript or otherwise. 



Genus — Beaohytrema, Morris and Lycett, 1851, Great Ool. Moll., p. 24. 



" Shell small, twisted, turbinated, solid. Whorls nodular, costated or cancellated ; 

 the last whorl large and ventricose ; columella smooth, rounded; hoisted near to 

 the base, and refecting outwards, forming a short oblique canal; aperture moderately 

 subovate, less frequently thickened, and externally subvaricose." — Fischer, ' Man. 

 Conch.,' p. 685. 



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