﻿JURASSIC AND TRIASSIC BRACHIOPODA. 



103 



Spiriferina ? oolitica was found by Mr. C. Moore in the Inferior Oolite of Dundry, 

 and also at Seavington, near Ilminster. It is said to have been met with in the Great 

 Oolite of Hampton Cliff, Bath. 



45. Spiriferina ? minima, Moore. Sup., PI. XI, fig. 17. 



Spirifeua minima, Moore. The Geologist, vol. iv, p. 190, pi. ii, figs. 19, 20, 1861. 



" Shell microscopic, often one-sided or un symmetrical, slightly rugose ; valves 

 moderately convex ; deltidium triangular ; area broad and flattened ; hinge-line broad ; 

 front of shell rounded. In some specimens the shell presents a uniformly flattened 

 surface, whilst in the majority the outer surface of the smaller valve possesses mesial 

 folds, and the larger valve a central sinus " (Moore). 



Obs. I know so little of this minute fossil that I cannot venture to express any 

 opinion with respect to the genus to which it belongs. I have, however, made a care- 

 fully enlarged drawing of one of the specimens, and which shows a kind of undefined 

 elevation or fold near the front of the dorsal valve, and also a kind of biplicatioii in the 

 ventral one. Mr. Moore states that the shell is not uncommon in the Inferior Oolite of 

 Dundry. 



46. Spiriferina ? Moorei, Dav. Sup., PI. XIII, fig. 20. 



Spec. Char. Shell minute, about one line and a half in length and breadth. Valves 

 very gently convex. In the dorsal there are seven rounded ribs, with wide concave inter- 

 spaces, the central rib being the widest. In the ventral valve, which is the deepest, 

 there are about six ribs, with a deeper interspace or sinus along the longitudinal middle 

 of the valve. Beak pointed, not much incurved, with a longish triangular foramen mar- 

 gined by deltidial plates. In the interior of the dorsal valve can be seen a divided 

 hinge-plate, to which was attached some kind of unknown support for the labial or 

 brachial appendages. 



Obs. Of this interesting minute fossil I have seen several examples, from which 

 I have made the carefully enlarged figures given in our plate ; but none showed the 

 interior, so that it was not possible to ascertain the genus to which it belonged. I 

 thought it, however, preferable to place the shell provisionally under Spiriferina, from 

 which it can be removed as soon as the genus to which it really belongs shall have been 

 ascertained. It bears much external resemblance to some Palaeozoic forms of Retzia 

 ferita. It was found by Mr. C. Moore in the Upper Lias of Ilminster. 



