ALARIA. 139 
species to the section of didactyls. It is quite contrary to the original diagnosis 
of Lycett. Whether this really is an anterior digitation, or merely an accident 
in the development of the fossil, is a question awaiting further evidence. 
Relations and Distribution.—The excessively rugose and spinous character of 
this shell, and the comparatively depressed spire, clearly separate this from all 
other Alarix previously described in this Memoir. Hence there seems to be little 
danger of its bemg confounded with any one of them. But since a doubt yet 
remains as to whether the species is didactyl or monodactyl, and having regard 
also to the apparent scarcity of specimens, Alaria spiniyera cannot be regarded 
as fully diagnosed at present. 
Al. spinigera, Lycett, is quoted in Witchell’s ‘Geology of Stroud,’ from the 
Oolite-Marl. 
58. Axara sonipa, Lycett, 1853. Plate LV, fig. 5. 
1858. Atanrta sonra, Lyc. Proc. Cotteswold Nat. Field Club, vol. i, p. ? 80. 
Description by Author.— Spire turrited ; whorls few, angulated by a circle of 
elevated, longitudinal, spinous ribs crossed by lines; body-whorl with a single 
carina, beneath which are several encircling grooves; wing simple, small, 
proceeding from the carina, caudal extremity short.” 
The specimen from which, apparently, the above description was taken, is in 
the Lycett collection at Jermyn Street, and has the word “ solida” still legible 
upon the reverse. The spiral angle is about 38°. Certain variciform swellings 
may be traced across the whorls, presenting a feature not often observed, but the 
specimen is too imperfectly preserved for further description. 
Relations and Distribution—Though the character of the spire is somewhat 
similar to that of the last-named species, the ornamentation is less spiny, and 
what appear to be the variciform lines or swellings seem still further to 
distinguish it; the spiral angle, also, is considerably less. On the other hand, the 
short, upturned digitation greatly resembles that which appears to be the posterior 
digitation of Al. spinigera. The fossil also reminds us somewhat of the form of 
Alaria (Diartema) hamulus of the Great Oolite and appears to have been derived 
from the Inferior Oolite of the Cotteswolds. 
Alaria solida is not quoted in Witchell’s ‘ Geology of Stroud.’ 
