395 



MODIOLA (Brachydontes). Species undeterminable. 



S^ The two specimens, one from Hornby Island, and the other from the 

 Sucia Islands, that were referred to M. ornata, Gabb, on page 167 of the 

 second part of this volume, are too small and fragmentary to be satisfac- 

 torily determined. The larger of them is only nine millimetres in length. 

 A similar specimen has recently been collected by Mr. Harvey, from the 

 roof of the coal at the Nanaimo mines. 



LiTHODOMUS NITIDUS. (N. Sp.) 

 PLate 48, fig. 3. 



Shell moderately elongated, about twice as long as high ; superior and 

 ventral borders horizontal, straight and nearly parallel for the greater 

 part of their length ; anterior end rounded ; posterior end somewhat 

 obliquely subtruncate above and narrowly rounded below ; umbones 

 obliquely depressed, beaks anterior and nearly or quite terminal. 



Surface lustrous, shining, and marked with concentric raised lines of 

 growth. Test very thin. 



Hinge dentition and muscular impressions unknown. 



Roof of coal, Nanaimo mines, W. Harvey, 1901 : four well preserved 

 but imperfect and crushed specimens, none of which shew the normal and 

 proportionate convexity of the valves. 



Inoceramus diCxITATUS (Sowerby) Schmidt. 



Inoeeramiis digitaUis (Sowerby) Schmidt. 1873. Ueb. die Petref. der Kreide-form. voii 

 Sachalin, in Mem. Acad. Imper. des Sciences de St Petersbourg, vol. 

 xix, No. 3, p. 25, pi. 5, figs. 10 and 11, and the whole of plates G and 7. 

 Inoceramus undulatoplicatus (F. Roemer) Schluter. 1877. Kreide-Bivalven zur Gattung 

 Inoceramus, p. 22, pi. 3, fig. 1. 

 „ „ Whiteaves. 1879. This volume, pt. 2, p. 168, pi. 20, figs. 



2 and 2 a. 

 Inoceramus mytilopsis, Whiteaves. 1879. Idem, p. 169, pi. 20, fig. 3 ; but probably not/. 

 mytilopsis, Conrad, if that shell is the same as /. labiatus, 

 Schlotheim. 

 Inoceramus digitatus (Sowerby) Jimbo. 1894. Beitr. zur Kenntniss der Fauna der 

 Kreide-form. von Hokkaido, in Dames and Kayser's Palseont. 

 Abhandl. (Jena), Neue Folge, Band ii, heft 3, p. 43, pi. 8 

 (24), figs. 8-10. 

 .1 n Whiteaves. 1896. Trans. Royal Soc. Canada for 1895, Second 



Series, vol. i, sect, iv, p. 121. 



The following remarks are from the publication last cited. 



