﻿42 ME. E. S. COBBOLD OX TRILOB1TES FROM [Feb. I9IO y 



south of the quarry, and from the quarry itself ; also from blocks 

 of limestone found in the overlying- conglomeratic bed. It is always 

 associated with fragments showing the reticulate pattern charac- 

 teristic of Ohnelhis, but has not yet been found in the red, Olenellus 

 Limestone. 



There is a general similarity between the eranidium of this species 

 from Comley, as seen from above, with that of Dr. Walcott's 

 Solenvpleura (?) howleyi, as figured by him. 1 He describes the 

 surface as being 'strongly granular or pustulose ' ; but, unfor- 

 tunately, he gives no indication of the longitudinal curvature of the 

 glabella, and the comparison cannot be carried further without 

 seeing the specimens themselves. Mr. Matthew claims S. (?) Jioiv- 

 leyi as a Protolenus 2 With these facts before me, I think it well 

 to make the generic reference of the Comley form with reserve. 



Protolenus, Matthew. 



G. F. Matthew, Bull. Nat. Hist. Soc. New Brunswick, no. 10 (1892) p. 34; Trans. 

 Row Soc. Can. vol. xi, sect, iv (1893) p. 100 ; and Trans. N.Y. Acad. ScL 

 vol. xiv (1895) p. 144. 



Pkotolexus latotjchej, sp. now (PI. VII, figs. 1-6.) 



E. S. Cobbold, Protolenus sp., Bep. Brit. Assoc. 1908 (Dublin) 1909, p. 23G. 



This species is founded upon fragments of more than thirty head- 

 shields derived from a few pounds' weight of the uppermost band 

 of the grey limestone of Comley. The specific name is given in 

 remembrance of the late Rev. J. D. La Touche, of Stokesay, whose 

 friendship and kindly help were so long enjoyed by all students of 

 Shropshire geology, and not least by myself. 



Craxidittm : Size — moderate : length = from 7 to 8 millimetres.. 



General form. — Semielliptical : proportion of length to width 

 = about 5:6. 



Convexity. — Well marked ; about J. 



Glabella. — Strongly convex ; distinct from the occipital ring ; 

 tapering somewhat forwards to the well-rounded extremity; about 

 three-quarters of the total length of the head-shield ; furnished 

 with three pairs of furrows, the anterior pair very short, the two 

 posterior pairs of medium length, directed somewhat backwards 

 and occasionally traceable, on the cast of the interior, quite across ;. 

 greatest elevation equally at the anterior and posterior lobes. 



Occipital furrow. — Entire: somewhat sinuous; sharply 

 impressed, especially on the internal cast. 



Occipital ring. — Exceeding in length the posterior lobe of the 

 glabella in the middle, but less than half of this length at the sides. 



Axial furrows. — Wide and deep between the fixed cheeks 

 and the glabella, but not marked by any impressed line. 



1 10th Ann: Eep. U.S. Geol. Surv. 1888-89 (1890) p. 657 & pi. xcvii, 

 figs. 7-7 a. In the explanation of this plate the names howleyi and harvcyl 

 have been transposed. 



2 Trans. Boy. Soc. Can. vol. xi, sect, iv (1893) p. 102. 



