EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 8 1 



Rensselaeria (Amphigenia) parva Clarke 



Plate 18, figures 7-13 



Rensselaeria (Amphigenia) parva Clarke N. Y. State Mus. Bui. 107. 1907. 

 p.247 



A small, sometimes quite elongate species often presenting the appear- 

 ance of a miniature of A. elongata Conrad. In the ventral valve the 

 median septum is strong and the spondylium well developed, the lateral 

 surfaces of the bottom of the valve vascular or pitted. In the dorsal valve 

 there is a large perforated hinge plate, the foramen apparently always open 

 in contrast to the condition of old specimens of A. elongata. The 

 external surface is marked by rather strong concentric lines with some 

 radial lines along the middle of the valves. 



Localities. Moose river at Stony brook, Tomhegan point, Moosehead 

 lake, and just north of Soccatean point, Me. 



Megalanteris cf. ovalis Hall 



Plate 18, figures 14-16 



Fragments and incomplete casts show the presence of this genus but 

 they are insufficient for safe identification. 



Localities. Telos lake dam (3435); Moosehead lake, Baker Brook 

 point ; southeast corner of Jackman farm in township of Parlin Pond. 



Meristella sp. 



Internal casts appear to represent a small variety of M. lata Hall 

 and a second species whose affinities are not determinable. 



Localities. Telos lake, 1 mile above Blind Cove point ; Telos lake 

 dam ; Jackman farm. 



Atrypa reticularis (Linne) 



The small and compact Helderbergian type occurs rarely at Jackman 

 farm. 



Leptocoelia flabellites (Conrad) 



Plate 20, figures 15-19 

 See pt 1, p. 174 ; pt 2, p. 142 



This shell which is extremely abundant in certain localities is always 

 small with pretty well marked fold and sinus, the former carrying two plica- 

 tions, there being two or three on each lateral slope. The shell does not 

 attain the average size of the prevalent form in the New York Oriskany 

 and is in notable contrast to the large individuals found in the Grande 

 Greve limestone. 



