. Mesozoic fossils. p. 98 (163, pi. xvi (xxii), figs. 1 a and 1 h ; and pi. XVII (xxiii) fig. 1. Two specimens from the Vancouver Cretaceous have been identifiedwith this Indian species by Dr. Kossmat. One of these, which the writer has not seen, is said to be a fine speci-men collected at Nanai-mo, V. I., by Sir JamesHector (presumably in1860) and now in theNatura History De-partment of the BritishMuseum. Tiie other,No. 14 of thesmall seriesof Ammonites sent toDr. Kossmat, and theoriginal of figure 1 onPlate 46, is a well pre-served specimen collec-ted at Hornby Island,by Mr. F. W. Robbins,in
. Mesozoic fossils. p. 98 (163, pi. xvi (xxii), figs. 1 a and 1 h ; and pi. XVII (xxiii) fig. 1. Two specimens from the Vancouver Cretaceous have been identifiedwith this Indian species by Dr. Kossmat. One of these, which the writer has not seen, is said to be a fine speci-men collected at Nanai-mo, V. I., by Sir JamesHector (presumably in1860) and now in theNatura History De-partment of the BritishMuseum. Tiie other,No. 14 of thesmall seriesof Ammonites sent toDr. Kossmat, and theoriginal of figure 1 onPlate 46, is a well pre-served specimen collec-ted at Hornby Island,by Mr. F. W. Robbins,in 1895, and presented Tig. 20. —Pachydiscus Otacodensis. Outline of transverse ^y him to the Museumsection of the outer volution, near the aperture, of the of the Survey. It mea-specimen from Hornby Island represented on Plate 46. gyres about five inches and a half in its grea-test diameter, and its aperture is higher than wide, elliptic subovate,but deeply emarginate by the encroachment of the preceding 341 Its umbilicus, which is rather deep and step-shaped, has a roundedmargin, and occupies about one-fourth of the whole diameter. On theouter volution the surface markings consist of distant, narrow, lowand rather tlexuous, transverse ribs, which become fainter with ageand are almost obsolete near the aperture. On the periphery or siphonalregion, at a short distance from the aperture, of the ribs are from nineand a quarter to twelve and a quarter millimetres apart. The spacesbetween these ribs are comparatively broad and nearly flat, and where thetest is preserved, the interspaces are marked with a few obscure minutetransverse riblets, or small, faint, rounded and very slightly raised ridges,that are parallel to the ribs. In the Museum of the Survey there are four other specimens, which,in the writers judgment, possess essentially similar characters, andtherefore are probably also referable to P. Otacodensis. Three of theseare from the Comox River, near Comox,
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