58 BKITISH OOLITIC AND LIAS1C BRACHIOPODA. 



small, recurved, and truncated by a diminutive foramen ; lateral ridges distinct, recurving 

 to join the hinge margin, with large longitudinal mesial fold in smaller valve, and cor- 

 responding sinus in larger one, and two lateral rounded plaits, with furrows corresponding 

 to these in the rostral valve ; front deeply sinuous, the central sinus by far the largest ; 

 surface smooth, punctuated ; loop short j length 2, width 2, depth 1 line. 



Obs. This small species, described and figured in 1847 by Mr. Morris and myself, was 

 stated to come from the Leptsena bed of or above the marlstone in the neighbourhood of 

 Ilminster; we do not, therefore, see why M. D'Orbigny places it in the Lower Lias or 

 his Terrain sinemurien, where we do not find it. Since the period above alluded to, 

 it has been obtained from similar beds in the neighbourhood of Pic de Saint Loup, near 

 Montpellier, in France, along with Zeptana liasiana by M. Bouchard, and also at Croisilles, 

 in Normandy, by M. Deslongchamps, though of the same dimensions as T. globulina, 

 it is easily distinguished by its sinuated front ; we are also indebted to the researches of 

 Mr. Moore for the discovery of this species. Fig. 16, natural size, 16 a, b, c, enlarged 

 illustrations. 



56. Terebratula Bentleyi, Morris, 3IS. Plate XIII, figs. 9, 10, 11 . 



Diagnosis. Shell inequivalved, irregularly pentagonal, decussated, notched and sinuated 

 in front ; perforated valve convex, with two rounded costas proceeding from the extremity 

 of the beak, and regularly diverging to the front, separated by a deep medio-longitudinal 

 sinus, and two lateral ones ; beak keeled, recurved, produced, and obliquely truncated by 

 an elongated apicial foramen, separated from the umbo by a deltidium in two pieces ; 

 lateral ridges well defined and continued along the sides without recurving to join the 

 hinge margin, leaving between it and the hinge line a somewhat flat false area. Smaller 

 valve slightly convex and depressed, subtrilobated, with three rounded costae, one central, 

 two lateral, divided by four grooves or sinuses proceeding from the umbo ; the central 

 rounded plait rising only at some distance from the umbo, the others being larger and 

 more elevated than the central one ; surface smooth, punctuated, and marked by numerous 

 lines of growth. Length 16, width 18, depth 11 liues. 



Obs. This is a very remarkable species not hitherto described, but found by the 

 Rev. A. W. Griesbach, Messrs. Bentley, Morris, and others, in the Cornbrash of Wallaston 

 and Rushden, in Northamptonshire, associated with T. intermedia lagcnalis, obovata, and 

 other well-known Cornbrash fossils, it has been met with in Lincolnshire, and I have it 

 likewise from France and Germany : it somewhat approaches in form to some specimens of 

 T. coarctata, but differs by many characters, especially by having its surface smooth, which 

 is not the case in the last-named species. We are not acquainted with its loop, but 

 judging from the external appearance of the shell would imagine it to be short, as in 

 T. coarctata. The two fine specimens illustrated in our plate belong to the Rev. A. W. 



