PLATE 20 

 Spirifer cf. concinnus Hall 



Page 85 



1-3 Internal casts of shells having some of the characters of this species 



4 An exterior of the dorsal valve 



Locality. Near Soccatean point, Moosehead lake 



Spirifer aroostookensis Clarke 



(See plates 30/34) 

 Page 85 



5 Fragment of exterior of a ventral valve showing the Hat depressed or 



sulcate ribs and narrow radial grooves 

 Locality. Tomhegan point, Moosehead lake 



Spirifer primaevus Steininger var. atlanticus Clarke 



1 S"i v plate tg) 

 Page 82 



6, 7 Enlargements of the fimbriate sculpture from different specimens. 



6, x 5 ; 7, x 10 



Spirifer sp. ? 



Page S 5 



8-14 A series of illustrations of a small, transversely elongate species 

 whose specific relationships are not clearly determined 

 Locality. Telos lake dam 



Leptocoelia flabellites (Conrad) 



(See plate 54 1 

 Page 81 



15 Ventral aspect of an internal cast with part of the shell adhering, k ij4 



16 Dorsal aspect of the exterior. These two shells are not satisfactory 



illustrations of the species and the drawings give them much the 

 aspect of a Coelospira, but this is an entirely misleading effect, over- 

 looked in the correction of the workmanship. 



17, 18 Dorsal and ventral sides of an internal cast. Compare with speci- 

 mens from the Tine Hill Oriskany on plate 34. 



19 Interior of dorsal valve showing structure of cardinal process 



Localities as noted on page 81 



206 



