CONULARIA ELEGANS. 39 



Horizons and Localities. — Wenlock Limestone : Malvern; Ledbury; Dudley; etc. 

 Upper Ludlow : Underbarrow ; etc. 

 Ti/p e . — Un known. 



Conularia breviconventa, sp. nov. Plate V, figs. 12, 13. 



Diagnosis. — Shell of medium size, tapering uniformly ; cross-section a flattened 

 rhomb. Faces equal, flat. Apical angle 10° — 20°. Marginal grooves narrow, of 

 medium depth ; facial grooves inconstant. Aperture unknown ; apex closed by 

 a convex septum. Ornamentation coarse; ridges, on an average, G in 5mm. for 

 the centre of the shell, closer at the aperture and the apex, forming an average 

 angle of 130°. Ornamentation of the typical cancellate type with close-set 

 tubercles, ceasing at the edge of the marginal groove. 



Dimensions. — Length about 70 mm. ; greatest width of face, 20 mm. 



Description. — This species is not nearly so common as the preceding one, but 

 occurs with it at Dudley and other places. The shell generally appears to be 

 compressed, as is seen by the fine wrinkles along the septum ; hence the 

 observed transverse section may not be the true one. The angle of the 

 face is always considerably larger than in C. sowerbyi. The marginal 

 grooves are markedly different, being narrow, well-defined, and apparently with 

 smooth base. The detailed ornamentation is the same as in 0. sowerbyi, but is, on 

 the whole, much coarser ; the angle of the ridges is smaller, and increases very 

 little towards the aperture, the ridges themselves are more sharply defined, and, if 

 curved at all, form simple arcs concave to the aperture. 



Affinities. — This species closely resembles the commoner form, C. sowerbyi, but 

 is distinguished by the coarser ornamentation, by the much larger facial angle, and 

 by the smooth, narrow, marginal grooves, in which the ornamentation of the rest 

 of the shell is absent. It very closely resembles C. trenlonensis, Hall, in the wide 

 facial angle and coarse ornamentation. 



Horizon and Locality. — Wenlock Limestone : Mayhill ; Dudley; etc. 



Type.— British Museum (Nat. Hist.) (reg. no. CI. 17GG7). 



Conularia elegans, sp. nov. Plate V, fig. 14. 



Diagnosis. — Shell small, tapering uniformly ; cross-section rhombic. Faces 

 equal, slightly convex ; apical angle 8° — 10°. Marginal grooves narrow, sharply 

 defined ; facial grooves absent. Aperture unknown ; apical septum slightly 

 convex. Ornamentation fine ; ridges regular, narrow, crowded (20 — 25 in 5 mm.) 

 forming an angle of about 140° across the face. Furrows crossed by fine, regular, 

 well-marked striations, which in places are seen to extend to the ridges. 



Dimensions. — Length about 60 mm. Greatest width of face, 12 mm. 



