114 DEVONIAN FAUNA. 



3. Order— ANISOMYARIA, Neumayr, 1883. 

 I. Family — Modiolopsid2E, Fischer, 1887. 



1. Genus — Modiolopsis, Hall, 1847. 



1. Modiolopsis, sp. Plate XII, fig. 7. 



Size. — Length 13 mm. 



Locality. — One specimen from Baggy Point, South Cave, is in the Museum of 

 Practical Geology. 



Remarks. — The specimen here noted is too much obscured by matrix for 

 description, but it appears to belong to this genus, and to be the only evidence of 

 it at present forthcoming from these beds. 



It is a long low shell with a very anterior umbo, from which a rather strong 

 angle runs to the postero-inferior corner. The base seems long and straight, and 

 the posterior end short and truncate. 



II. Family — Mytilid,e, Fleming, 1828. 

 1. Genus — Modiola, Lamarck, 1801. 

 1. Modiola ? amygdallna, Phillips. Plate XIII, fig. 12. 



1841. Modiola ahygdalina, Phillips. Pal. Foss., p. 38, pi. xvii, figs. 62 a — c. 



Description. — Shell small, narrow, oblique, very convex. Hinge-line probably 

 rather short. Umbo large, rounded, prominent, incurved over the hinge-margin, 

 and facing forwards. Anterior side produced, small, very convex. Antero- 

 inferior side very long, straight. Postero-inferior corner large, produced, roundly 

 convex. Posterior side oblique, convex. Contour convex confluently with umbo, 

 becoming concave on the small, undefined rounded wings. Surface with strong 

 growth-lines (not shown in the figure). 



Size. — Height 14 mm., width 11 mm. 



Locality. — One specimen in the Porter Collection is from Fremington. 



Remarks. — This small shell, which is only a cast, is too indistinct for very 

 certain identification. Its most characteristic feature seems the way in which the 

 anterior end is produced just under the hinge, forming above a kind of lunule in 

 front of the umbo, and bounded below by a slight constriction from the umbo, 



