12 



I have no hesitation in referring this form to G. gryphoides 

 (de Koninck), although the specimen is distorted somewhat. 



Upper Marine beds, Mersey, associated with Gangamopteris 

 angustifolia. (McCoy.) 



CaEDIOMOBPHA (?) MINTTTA. (NOV. Sp.) 



Shell minute, somewhat compressed, wedge-shaped ; beaks 

 greatly expanded, approximate, but slightly recurved ; surface 

 with distinct concentric grooves, the interspaces being regularly, 

 concentrically ornamented with fine striae. 



Length, 13 millimetres ; breadth, 10 mil. 



This very curious form is doubtfully referred to Oardio- 

 morpha. Only one slightly imperfect specimen obtained from 

 Upper Pala30zoic sandstones, River Styx. 



Family Anatinidj?. Genus Edmondia. (Koninch.) 

 Shell oblong, equivalve, thin, concentrically striated, close ; 

 umbones anterior ; ligamental grooves narrow, external ; hinge 

 line thin, edentulous, furnished with large oblique cartillage 

 plates placed beneath the umbones, and leaving space for an 

 ossicle, or the plate may be equivalent to the sub-umbonal 

 blade in Pholas ; pallial line simple ? (Tryon.) 



Edmondia (P) dtjbia. (nov. sp.) 

 Shell small, broadly oval, inequilateral, about one-third 

 longer than broad, regularly convex ; beaks small, slightly 

 recurved, situated nearer anterior side ; surface ornamented 

 with regular and somewhat coarse lines of growth. 

 Length, 24 millimetres ; height, 24 mil.; thickness, 9 mil. 

 This form is abundant in Upper Palaeozoic sandstones, 

 River Styx. It is doubtfully placed under the genus Ed- 

 mondia, although closely resembling Gardiomorplta striatella 

 (de Koninck), from which it differs in the umboes being placed 

 nearer anterior side, and in having the dorsal margin more 

 decidedly arched. 



Eamilt AyicuiiDiE. Genus Inoceeamus. (Sowerby.) 

 Shell inequivalve, ventricose, radiately or concentrically 



furrowed ; umboes prominent ; hinge line straight, elongated ; 



cartillage pits transverse, numerous, close set. (Tryon.) 



Inoceeamus (?) eleganttjla. (nov. sp.) 

 Shell somewhat quadrangular, equilateral, hinge line and 

 anterior slope straight, forming a rectangle ; surface of valve 

 divided by an oblique obsolete ridge proceeding from umbo, 

 situated at angle between hinge line and anterior slope, and 

 continuing to lower extremity of posterior slope ; there is a 

 shallow trough between ridge and hinge line ; below ridge the 

 valve is gently convex ; posterior slope with a shallow sinus 



