285 



volume, has been lent to the writei* by the Natural History Society of 

 British Columbia. 



Since then Dr. Newcombe has lent to the writer nine specimens that 

 are clearly referable to this species, from two to seven, and even nine 

 inches in their maximum diameter, that he collected at the east end of 

 Maud Island in 1895. Seven of these, including the largest and the 

 largest but one, are marked by large and comparatively distant flexuous, 

 plications which are strongly developed on the sides, but obsolete, or 

 nearly obsolete on the venter. In the largest of these specimens some of 

 the plications are as much as fourteen millimetres apart at their summits, 

 on the outer portion of each of the sides. 



A specimen with extremely small and comparatively close-set, flexuous 

 radiating, raised lines, which is apparently referable to this species, was 

 collected at a locality north-west from Yakoun Lake, on the Rennel 

 Sound Trail, by Mr. S. Pearse in 1894, and lent to the writer by Dr. 

 Newcombe. 



From the whole of this new material it would appear that the fossil 

 described on page 23, and figured on Plate 1, figures 3 and 3a of the first 

 part of this volume as a dwarfed costate variety of Ammonites Brerveri is 

 really a small specimen of the typical form of the species, and that the 

 "presumed typical form" described on page 22 of the same publication 

 and represented on Plate 1, figs. 2 and 2a, is a less typical and smoother 

 variety, more nearly related to the next species. 



Desmoceras (Puzozia) Haydenii. 



Ammonites Haydenii, Gabb. 1864. Geol. Surv. Calif., Palseont., vol. I, p. 62, pi. 10, tigs. 

 8, & 8 a-b. 



The writer has long been under the impression that the six specimens 

 referred to on page 23 of the first part of this volume as closely resem- 

 bling A. Haydenii, are really referable thereto. Quite recently Prof. 

 John C. Merriam, who has kindly compared some of these specimens 

 with the types of A. Haydenii in the Geological Museum of the Univer- 

 sity of California at Berkeley, has expressed himself as satisfied with the 

 identity of these two forms. Specimens similar to those obtained by Mr. 

 Richardson were collected at the east end of Maud Island by Dr. New- 

 combe in 1895, but it seems to the writer that A. Haydenii is only a 

 small, smooth form of A. Breiverii. 



Desmoceras (Puzozia) Perezianum. 



Ammonites Perezianus, Whiteaves. 1876. This volume, pt. 1, p. 19, pi. 2, figs. 1 and 

 1 a. But not A. Perezianus, D'Orbigny, 1850, Prodr. de. Pale- 

 o.at., p. 9. 



Haploceras Perezianum, Vhiteaves. 1884. This volume, pt. 3, p. 204. 



