372 G. J. HINDE ON ANNELID JAWS PROM THE WENLOCK: AND 



EuNiciTES UNGuicuLTJS, Hinde. (PI. XIV. fig. 11.) 



Jaw somewhat semioval, flattened, or slightly concave ; the base 

 straight, with a small oblique projection at the anterior end ; an 

 arched upper margin, with nine denticles, of which the two largest 

 are slightly incurved. Length | line, depth | line. This form, 

 like the two preceding, appears to have been one of the "para- 

 gnaths," or small anterior jaw-plates of the animal. 



Loc. and form. Wren's Nest, Dudley : Wenlock group. 



Genus (Enonites, Hinde, 1879. 

 CEnonites eegulaeis, Hinde. (PL XIY. fig. 2.) 



Jaw subtriangular, compressed, with a slightly projecting knob- 

 like elevation at the angle in the centre of the base, a prominent 

 curved hook at the anterior end, the upper margin straight and 

 carrying a series of thirteen teeth. Length 1 line, width -2- line. 

 This form is allied to (E. cimeatiis, H., from the Cincinnati group, 

 but differs in its more triangular outline, the elevation at the basal 

 angle, and its larger size. 



Loc. and form. Wren's Nest, Dudley : Wenlock group. 



CEnonites navieoemis, Hinde. (PI. XIY. fig. 3.) 



Jaw oblong, compressed, the basal margin curved and having a 

 small notch in the centre, the posterior end truncate ; the anterior 

 tooth bent slightly out of plane with the plate of the jaw; on the 

 nearly straight upper margin are ten blunted denticles. Length 



I line. 



This form is closely related to (E. am]plus, H., from the Clinton 

 group of Canada, from which it is distinguished by the uniform 

 series of teeth and the notched base. 



Log. and form. Wren's Nest, Dudley : Wenlock group. 



(Enonites ctjneatijs, Hinde. 



(Enonites cuneatus, Hinde, Quart. Journ. Geol. Soc. vol. xxxv. 

 pp. 377, 381, pi. xviii. fig. 11. 



The English examples of this form, with the exception of a slight 

 difference in the curvature of the anterior hook and a less number 

 of the minute denticles, are identical with those from the Cincinnati 

 and Clinton formations of America. The specimens do not exceed 

 half a line in length. 



Loc. and form. Iron Bridge, Shropshire ; Wenlock group. 



CEnonites cuneatfs, Hinde, var.'^nuMiLis. (PI. XIY. fig. 6.) 



Jaw semioval, compressed, with a delicate anterior hook, slightly 

 bent outwards, and on the nearly straight upper margin of the jaw 



II subequal denticles. The variety differs from the typical CE. cu- 

 neatus in the relatively smaller anterior hook, which is followed, 

 without any interval, by the smaller denticles. Length ^ line. 



Loc. and form. Iron Bridge ; Wren's Nest, Dudley : Wenlock 

 group. 



