32 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 54. 



N. rohustus, page 36, plate 11, figure 9; plate 12, figures 4, 7, 10, 

 12, 14, 15. 



iV. abnormis, page 39, plate 11, figure 16. 

 N. crassus, page 37, plate 12, figures 16, 17. 

 DESCRIPTIONS OF SPECIES. 



NUCULITES CORRUGATLS WUUams. 



Plate 11, figs. 10, 12, 18. 



1913. Nuculites corrugatus Williams, Proc. U. S. Nat. Mus., vol. 45, p. 347, pi. 31, 

 figs. 11 and 14. 



In the original publication of tliis species two specimens were 

 selected for illustration, both of which are more or less distorted. 

 Considerable variation in form was recognized. Since then all the 

 representatives of the genus, from the Eastport Quadrangle, have 

 been critically studied with the result that the normal form of the 

 species can now be more accurately determined. This normal form 

 is fairly well represented by the new figures given in this paper (pi. 

 11, figs. 10, 12, and 18). 



The average length of 18 specimens from the Leighton Cove locaUty 

 is 23 1 mm. The average height in proportion to length is 53/100. 



The specimens from the Crowe Neck locahty are smaller, rarely 

 exceeding the average length of the Leighton Cove specimens. Their 

 relative height is approximately the same. 



Other forms, associated with this species in the typical locahty, are 

 represented by figures 6, 15, 20, and 21. These are described beyond 

 under separate specific names. 



Formation and locality. — Pembroke formation, in the Leighton 

 gray shale member at the head of Leighton Cove, Pembroke Town- 

 ship (loc. 5.3.8 F) for the cotypes Cat. No. 58976 U.S.N.M. and the 

 specimen figured on plate 11, figure 12. 



Edmunds formation, gray shales, shore of the Httle cove in north- 

 east part of Crowe Neck opening into northeast end of Straight Bay 

 Trescott Township (loc. 5.33.8 B) for the specimens figured as figure 

 10 and 18 on plate 11, Cat. No. 62869 U.S.N.M. 



This last locahty is beheved to be at the dividing line between the 

 Edmunds and Pembroke formation. In the foho it is mapped as 

 Edmunds. 



RemarTcs. — Specimens of this species have been found in other out- 

 crops of the Pembroke shales, at the head of Leighton Cove in lower 

 beds of the same section (namely, loc. No. 5.3.8 m and 5.3.8 E also 

 on the outside of Leighton Point (at loc. No. 5 : 4.7 B). 



NUCULITES PHOLUS, new species. 



Plate 11, fig. 6. 

 This is a small species, which in general form resembles N. corru- 

 gatus, but it is less than half the size; the beak is further back aid 

 both the front and back ends are more prolonged and narrowed. The 



