82 NEW YORK STATE MUSEUM 



Localities. Webster lake, north side; Telos lake dam; Blind Cove 

 point, Moosehead lake ; outlet ot .Moose brook and Black point ; [ackman 

 farm, Jackman township; Parlin Pond township, north of Bean brook on 

 the Canada road ; Matagamon lake, east side, i mile above dam. 



Spirifer primaevus Steininger var. atlanticus Clarke 



Plate It), figures 5-12; plate 20, figures 6, 7 



Spirifer p r i m a e v u s Steininger var. at 1 an t i c u s Clarke. N. Y. State Mus. Bui. 107. 



1907. p. 260 



For comparison consult : 



Morris & Sharps. Geol. Soc. Quar. Jour. 1846. 2:276, pi. n, fig. 3. (S.orbignyi) 



Steininger. Geognos. Beschreib. der Eifel. 1853. p. 72, pi. 6, fig. 1. (S. primaevus) 



Sharpe. Geol. Soc. Lond. Trans. 1856. Ser. 2, 7:206, pi. 26, fig. 1, 2, 5. 

 (S. antarcticus) 



Hall. Palaeontology of New York. 1859. ;, : 422, pi. <n 7 . (S. ar rectus) 



Kayser. Fauna der aeltest. Devon-Ablagerungen des Harzes. 1878. p. 165, 168, 

 pi. 22, 23. 35. (S. decheni, S. hercyniae, S. primaevus 



Ulrich. Neues Jahrb. fur Mineral. Beil. Bnd. 8. 1893. p. 65, pi. 4, fig. 19, 20. 

 (S. chuqui sac a) 



Scupin. Die Spiriferen Deutschlands. 1900. p. 84-88, pi. 8. (S. primaevus, 

 S. f a 1 1 a x Giebel = S. decheni Kayser, S. h e r c v n i a e Giebel, S. h er c y niae var. 

 p r i m a e v i f o r mis) 



Clarke. N. Y. State Mus. Mem. 3. 1900. p. 46. pi. 6. fig. 26, 30. (S. mur- 

 ch is o n i Orbigny) 



Reed. An. South African Mus. 1903. v. 4, pt 3, 7, p. 180, pi. 22, fig. 4. (S. 

 o r b i g n yi Morris & Sharpe) 



The identity of species in the group represented by S. arrectus 

 (S. m u r c h i s o n i) and S. p r i m a e v u s, is involved with obscurities of a 

 kind which seem to indicate that in the considerable variety of species 

 names from many countries some are synonymous terms and the majority, 

 perhaps all the rest, are local expressions. The general type of structure is 

 that of a sparsely ribbed Spirifer with the plications usually broadly 

 rounded, a prominent fold and sinus without plication in the latter, and the 

 entire surface finely fimbriate. The interior of the ventral valve has a very 

 strong muscular scar appearing in the cast as a sulcate cordiform promi- 

 nence and the plications lose themselves posteriorly on account of umbonal 

 thickening of the valve. The shells now before us from central Maine are 

 identified as a variety of the widely diffused Coblentzian species S. 

 primaevus, not because of structural resemblances that can be fixed 

 upon from the descriptions given of that species and its close allies in the 

 Coblentzian, S. decheni, S. hercyniae ami its variety primaevi- 

 formis, but the determination is based on comparisons with specimen^ oi 

 these species from Stadtfeld, Kellerwald and elsewhere kindly supplied and 

 identified by Prof. E. Kayser. These shells are of large size with sub- 

 triangular outline, the anterolateral margins being rather direct and not 



