THE FAUNA OF THE ST. JOHN UEOUP. 33 



to give a better idea of the species above cited, than the descriptions in the works above 

 referred to : one example appears to indicate that this species possessed a short stem npon 

 which the basal plate was set, but the material in hand is still too imperfect to give a 

 satisfactory view of the complete skeleton, and is reserved for future examination. The 

 species has not yet been found to extend beyond the limits of Div. I.e. 



IV.— BRACHIOPODA. 



LINGULELLA, Salter. 

 LiNGULELLA (!) INKJATA, u. sp. (Plate V. Figs. 1 and Ya.) 



Of this species only the ventral valve is known. This is broadly ovate, rounding 

 rather abruptly to the front from about the middle of its length. The shell is strongly 

 arched from the beak and sides toward the middle, the highest point being about one third 

 from the beak. The beak is acutely triangular but not attenuated, and for some distance 

 from it the diverging sides are nearly straight. 



Sculpùor. The surface of the shell is crossed by about seven slightly elevated lines 

 or undulations concentric to the umbo ; between these are numerous fine striae of growth, 

 scarcely visible to the naked eye. 



This little shell is very high and round in the centre of the valve for a Lingula or 

 Liiigulella. It is about the size of L. ferrugiiiea of the "Welsh Cambrian, but differs in the 

 triangular beak. It is smaller than L. primœva (Hicks) and also differs from that shell in 

 being proportionately broader. 



Length, 4 mm. Width, 3J mm. 



Horizon and Locality. In the dark sandstones of Div. l.h, at Hanford Brook, St. Martin's. 



LiN(;uLELLA Dawsoni, u. sp. (Plate V. Figs. 9a, b, c, and d.) 



Lingula .^ Daivsoni, U. S. Qeol. Survey, Bull. 10, PI. V. Fig. 8. 



A rather broad example of the ventral valve of this species was described in Mr. 

 Walcott's bulletin as follows : — Shell small, broadly sub-elliptical, subattenuate toward 

 the beak ; margins gradually expanding and ciirving from the beak to the centre, where 

 the shell has its greatest width, and thence narrowing toward the front, which is broadly 

 rounded. Greueral surface depressed convex, becoming more convex toward the beak. 



Surface marked by fine, undulating, concentric lines, crossed by radiating lines that 

 are seen only by the aid of a strong magnifying glass 



In form this species approaches Lingulella ferruginea of Salter (Manual British Fossil 

 Brachiopoda, Davidson, Vol. III. p. 336), of the Menevian formation of "Wales quite 

 closely ; but, with only a specimen of the ventral valve to compare with it, it is difficult 

 satisfactorily to determine its specific relations. 



A series of individuals of this species enables the writer to give more fully the specific 

 characters :— 



The dorsal valve of the size figured in Mr. "Walcott's bulletin is about as wide as it is 



See. IV., 1885. 5. 



