158 OONTRUiUTIONS TO CANADIAN PALEONTOLOGY. 



be carefully compared with Meek's original diagnosis of these two 

 genera, it will be found that they differ materially from Sphenodiscus 

 in having their outer lateral lobes and saddles distinctly branched, as 

 well as in the much greater obtusenoss of their perijjhery, and from 

 Placenticeras proper, in the circumstance that their narrowly rounded 

 periphery is neither truncated nor " provided with a row of compressed 

 alternating nodes around each margin." Still, under all the circum- 

 stances of the case, the course that seems open to the fewest objections 

 is to follow Zittel and to refer the species, for the present at least, to 

 Placenticeras. 



Placenticeras (Perezianum ? var.) Liardense. 

 Plate 20, figs. 1 and 2. 



Liard Eiver, near Old Fort Halkett, E. G. McConn'ell, 1887 : four 

 other specimens of an Ammonite, which may possibly represent a 

 local variety of P. Pei-ezianum. They were found in flattened lenticular 

 masses which have been sj)lit open in such a way as to expose one side 

 only of each shell, and two out of the four are mei'e fragments. The 

 characters of the periphery cannot be ascertained in either, the sides 

 are crushed nearly flat and the sutural line is not visible, but the 

 surface markings and the size and shape of the umbilicus are clearly 

 shown in all. 



So far as it can be made out, the general contour of each of these 

 four specimens appears to have been essentially the same as that of the 

 type of the species, but their sculpture is of a much more decided 

 chai'acter, and consists of well defined, slightly flexuous, rounded and 

 transverse, rib-like folds, which widen rapidly outward towards the 

 pei'iphery and are entirely devoid of tubercles. At an early stage of 

 growth these folds are simple, and alternately long and short, but in 

 the larger specimens, most of the longer folds bifurcate near the middle 

 of the sides, and a shorter fold, which becomes obsolete before reach 

 ing the umbilical margin, is usually intercalated between each pair of 

 the longer ones. 



SCAPHITES QdATSINOENSIS. 



Plate 21, flg. 2. 



OlcoKlei^hanus Qualxinoenm, Wbiteaves. 1882. Trans- Roy. Soc. Can., vol. I., 

 Section IV., p. 82, woodcut fig. 1. 



ScaphileK Quatginoenm, Wbiteaves. 1887. Geol. and Nat. Hist. Surv. Can., 

 Ann. Rep., N. S., vol. II., p. 114 b. 



East side of Winter Harbour, Forward Inlet, Quatsino Sound, Van- 



