ALARIA. 111 
28. ALARIA ANGUSTA, sp. nov. Plate LV, fig. 2. 
Description : 
Length : : : : 22 mm. 
Width of body-whorl to length of shell . 30:100. 
Approximate spiral angle : a tailie 
Shell fusiform, turrited. Apex blunt. Whorls about ten, prominent and deeply 
divided by the suture on the principal whorls of the spire; the carina is very nearly 
median, and the slope of anterior and posterior moieties nearly equal. The longi- 
tudinal costz are well developed, and especially prominent on the keels ; they extend 
almost from suture to suture, but are strongest anteriorly. The spirals are close, 
undulating, and distinct ; about seven fine ones in the posterior half of the whorls, 
and four or five stouter, and wider apart, below the keels. The last whorl is 
but shghtly ventricose, and has ornaments nearly similar in character to those of 
the spire, except that the coste are reduced to tubercles on the keel, and that 
there is a faint trace of an anterior keel at the base. The canal-sheath is broken 
off short; other indications wanting. 
Relations and Distribution.—Although the specimen from which the above 
description is taken seems never to have carried a wing, the indications are clearly 
those of an Alaria. The blunt apex, and nearly smooth apical whorls, afford 
additional evidence in this direction. We may regard it either as an immature 
shell, or as a species of Alaria which had not developed a wing (Adactyl). In 
many cases the absence of a wing is due to mutilation, but hardly so in this. From 
the whole of the hamus-group it is separated by the ornamented character of the 
body-whorl, and by considerable differences in the ornaments of the spire and 
other features. It comes pretty near in many respects to Alaria arenosa. 
The specimen is unique, and forms part of the Inferior-Oolite collection in the 
Bristol Museum. I have no note as to the horizon or locality. It is a well preserved 
spathic fossil in a fawn-coloured limestone, which is not iron-shot. 
29. Ataria? sp.nov. Plate IV, fig. 3. 
There is hardly enough of this fossil remaining to determine its true character. 
The whorls are very tumid and without much keel. The spiral ornaments are 
numerous and well cut; the longitudinal cost are very thick and wide apart, and 
extend almost from suture to suture. The spiral angle appears to be rather wide. 
