320 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



cTiisma Jielicites (Sowerby) and Grammy sia triangulata (Salter) , species 

 found typically in the Ludlow formation of Great Britain. 



In a paper entitled ''Correlation of the Paleozoic Faunas of the 

 Eastport Quadrangle, Maine,"^ I described briefly the subdivision of 

 the rocks of the Eastport quadrangle into six formations, speaking of 

 them as formations I, II, III, etc., and mentioned some of their char- 

 acteristic fossils. In the course of preparing the Eastport foho, the 

 following names have been adopted for these several divisions, viz: 



Formation No. I = Quoddy shale. 



Formation No. II==Dennys formation. 



Formation No. 111 = Edmunds formation. 



Formation No. IV = Pembroke formation. 



Formation No. V = Eastport formation. 



Formation No. VI = Perry formation. 

 As indicated in the paper above referred to, the formations I to V, 

 inclusive, are of Silurian age, and formation VI is Devonian. 



FOSSILS OF THE EDMUNDS FORMATION. 



BRACHIOPODA. 



Genus WHITFIELDELLA Hall and Clarke. 



WHITFIELDELLA EDMUNDSI, new species. 

 Plate 29, figs. 1, 2, 3, 4. 

 Cf. 1839. Atryjpa didyma Sowerby, Sil. Syst., p. 614, pi. 6, fig. 4. 



Description. — Shell small; valves about equally convex, sub- 

 pentagonal, about as wide as long; beak, small; front with a furrow 

 in each valve reaching nearly to the beak; furrow on pedicle valve 

 slightly longer and wider than that on the brachial valve. Brach- 

 idium of two cones opposed as in Merista, each cone composed of 

 8 or 9 coils. The connecting loop unknown. No medium septum 

 in the brachial valve. Dimensions of figured specimen 13.2 mm. 

 wide by 11.9 mm. from beak to front; another specimen 12.7 mm. 

 by 11.6 mm. 



Formation and locality. — Edmunds formation, Burnt Cove, east 

 shore, south of Cunningham Mountain, Edmunds Township, Wash- 

 ington County, Maine, loc. No. 5.5 1.5 B. 



Cotypes.— Cat. No. 58944 U.S.N.M. 



Comments. — This small species resembles very closely in exterior 

 form and size the species figured and described by Sowerby under 

 the name Atrypa didyma (Terehratula didyma Dalman). 



Sowerby's description is: 



Nearly globose; beaks small; front emarginate, with a furrow in each valve reach- 

 ing nearly to the beaks. Length, five lines; width the same. 



1 Bull. Geol. Soc. America, vol. 23, pp. 34 9, 356. 



