﻿242 DEVONIAN FAUNA. 



crossed by numerous minute stride or lines of growth (which are more or less 

 regular and clear, probably owing to the state of preservation of the fossils), which 

 curve slightly rearwards on the lower part of the back, and then slightly forward 

 again below. Shoulder (just within the suture on the inner whorls and just 

 above the greatest diameter of the shell on the outer whorl) often bearing a 

 line of frequent scars of attachment, which do not preserve any trace of impressed 

 ornament, so that the attached bodies were possibly stones and not shells. 



Size. — Height 6 mm., width 22 mm. 



Localities. — This species appears to be rather common. There are two 

 specimens, one bearing scars, in Mr. Lee's Collection in the British Museum, and 

 four in the Woodwardian Museum from Lummaton. There are seven specimens 

 in Mr. Vicary's Collection and two in the Museum of Practical Geology from 

 Wolborough ; and there are seven in the Torquay Museum, of which five are in 

 the Battersby Collection, from these two localities. 



Remarks. — The above description is taken chiefly from a shell in the Torquay 

 Museum and a shell of Mr. Vicary's. These shells differ only in the striae of the 

 latter being more regular ; in both cases they are equally microscopic. They 

 accurately correspond with the two best figures (a, b only) of Phillips's 

 Euomplialus serpens, and clearly belong to that species. In Mr. Vicary's shell 

 there are no signs of scars ; and, indeed, only two of the Torquay specimens 

 show them, the others being, however, mostly in the condition of casts. 



I have not met with Phillips's type, but Mr. Vicary's specimen is so exactly 

 similar as to answer the same purpose. As the markings are only visible under a 

 strong lens, Phillips's description of it as smooth may be regarded as approxi- 

 mately accurate. 



At page 138 of the ' Pal. Foss.' he describes another shell, Eu. annulatus, 

 Phil., as identical with that figured as pi. xxxvi, fig. 172 a, b, from which, how- 

 ever, it distinctly differs both in the number of its whorls and the coarseness of 

 its ribbing. 



In fact, under the headiog of Eu. serpens and Eu. annulatus in the ' Pal. Foss.' 

 Phillips, as he himself seems aware, has included several separate species of shells. 

 Four, if not five, very distinct forms are recognisable, viz. : 



No. 1. Figs. 172 a, b, — practically smooth, flat, horizontally symmetrical. 



No. 2. Fig. 172*, — finely ribbed, flat, of many whorls. 



No. 3. Fig. 172/, — strongly ribbed below, few whorls, deep umbilicus. 



No. 4. Fig. 172 g, — spire flatly conical, strongly ribbed (?), of few whorls. 



No. 5. Figs. 172 c—e, — flatly conical, minute, smooth, of many whorls. 



(a) It seems best to regard No. 1 as the type of the restricted species Eu. 

 serpens, Phillips, as that species agrees best with his description, and is well 

 represented by his first and most prominent figures. 



