210 



which, as already pointed out, is an Olcostephanus, 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 by the much closer enrolment of the whorls, by the almost 

 complete envelopment of the inner volutions and more especially by 

 tlio broad and deep constriction of the outer whorl immediately behind 

 the aperture. 



A perfect specimen of 8. 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 Skidegate Inlet. 



STEPHANOCERAS CEPOIDES. (N. Sp.) 



Ammonites Loganianus, Wbiteaves. Form B This volume, p. 30, pi. 8. figs. 

 1 and la. 



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

 whose maximum diameter is about twenty-five 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 costse, which alternate with simple secondary 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. 



PERISPHINCTES SKIDEGATENSIS, Whiteaves. 



Ammonites SMdcgatcnm, Whiteaves. This volume, p. 34, pi. 7 and pi, <),fig. 1. 



East end of Maud Island : a small but characteristic 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 Dr. G. M. 

 Dawson. 



