210 



which, as already pointed out, is an Olcosfephanus, but as a distinct 

 species of Stephanoceras remarkable, as is the next also, for its very- 

 close resemblance to some of the Jurassic Macrocephali. It can at once 

 be distinguished from the type of Olcostephanus Loganianus, as the 

 latter species is now understood, by its smaller size, its narrow umbi- 

 licus caused b}^ the much closer enrolment of the whorls, by the almost 

 complcie envelopment of the inner volutions and moi-e especially by 

 the broad and deep consti'iction of the outer whorl immediately behind 

 the aperture. 



A perfect specimen of S. oblatum, which differs from the original of 

 the figures on plate 4 of the present volume only in being a little 

 smaller, was purchased by Dr. G, M. Dawson from Indians, who stated 

 that it was found in Skidec;ate Inlet. 



Stephanoceras cepoides. (N. Sp.) 



Ammonites Loganianus, Whiteaves. Form B- This volume, ]). 30, pi. 8. figs. 

 1 and Irt. 



South Island, Skidegato Inlet : a small but well preserved specimen, 

 whose maximum diameter is about twcnty-tivo millimetres. 



This species also seems to differ both generically and specifically 

 from the Olcostephanus Loganianus as now restricted. It (the 0. 

 cepoides^ may be at once recognized by its nearly globose form, by the 

 close enrolment of its whorls and consequently narrow umbilicus, also 

 by its sculpture which consists of non-tuberculated and bifurcating 

 primary costa", which alternate with simple secondaiy ribs. The 

 analogies between this shell and young specimens of Ammonites Ger- 

 villei, Sowerby, which is likewise a Stephanoceras, have been pointed 

 out on page 31 of the present volume. 



Perisphinotes Skidegatensis, Whiteaves. 



Ammonites Skidegatensis, Whiteaves. — This volume, p. 34, pi. 7 ami pi, i), fig- 1. 



East end of Maud Island : a small but chai-acteristic fragment. An 

 exquisitely perfect specimen of this shell, which measures two inches 

 and a-half in its greatest diameter and which is said to have been col- 

 lected in Skidgate Inlet, was purchased from Indians by Dj-. G. M. 

 Dawson. 



