242 



(op. cit., p. 10(?,) says, " leiir nombre phis frequent est de sept a hiiit," 

 and adds, "nous avons siir les yeux des echantillons a cinq cotes, et 

 plusieurs meme a trois." 



Camptonectes curvatus, Cleinitz. 

 Plate 32, fig. 4. 



Pecten curvatus, Geinitz. 



Pecten virgatus, d'Orbigny. 



Pecten {Camptonectes) curvatus, Stoliczka. 



'f.=Camplonecte.s extenwxtus, Meek. 



(I II 



a li 



Hall and Whitfield. 



Whitfield. 



—1843. Kieslingsw, p. 16, pi. 3, 



fig. 13. 

 — 1848. Quadersandstein, p. 180. 

 — 1845. Paleontologie Frangaise, 



Terrains Cr^taces, Vol. 3, p. 



002, pi. 434, figs. 7-10, as of 

 Nilsson, but not P. lirgatus 

 Nilsson. 



— 1871. Palyeontologia Indica, 

 Cephalopoda of S. India, Vol. 



3, p. 433, pi. 31, figs. 15-16, 

 and pi. 41, figs. 433. 



— 1865. Paleontology of the 

 Upper Missouri, p. 78, pi. 3, 

 fig. 6. 



—1877. United States Geologi- 

 cal and Geographical Ex- 

 ploration of the Fortieth 

 Parallel, Vol. 4, p. 290, pi. 7, 

 fig. 18. 



—1876. Palaeontology of the 

 Black Hilis of Dakota, p. 

 353, pi. 4, figs. 4, 5. 



East end of Maud Island, a single right valve. Judging by the 

 figures and descriptions only it is very difficult to sec how the Camp- 

 tonectes extenuatus of Meek is to be distinguished from the C. curvatus 

 of Geinitz, assuming that Dr. Stoliczka's synonomy of the latter species 

 is correct, which the writer has no reason to doubt. 



Amusium lentioulare. (Nom. Prov.) 

 Plate 32, fig. 5. 



Shell strongly compressed, thin, lenticular ; outline as viewed laterally 

 nearly circular, the length and height being very nearly equal : anterior, 

 posterior and basal margins regularly rounded ; beaks small, prominent, 

 erect, appressed and central ; superior border, exclusive of the ears, 

 descending obliquely, rather rapidly and somewhat concavely on both 



