128 



SgALABIA (OpALIA.) iVtATHEWSONII, (xABB. 



Scalaria (Opalia) Mathewsonii, Gabb.— Pal. Cal., Vol. I, p. 212, pi. 32, fig. 278. 

 Compare Scalariapulchra, Sowerby. — Trans. Geol. Soc, Lond , 1836, series 2, Vol. IV. 



p. 343, pi. 18, fig. 11 ; and Geol. Mag., Lond. 



N. S., Vol. III., p. 109, pi. 3, fig. 14. 



Productive Coal Measures, Division A., of the Sucia Islands; J. Eich- 

 ardBon, ISVS. An imperfect specimen with only parts of the test pre- 

 served, aiid with no indications of the basal carina remaining. 



Margarita ornatissima, Gabb. (Sp.) 



Angaria ornatissima, Gabb. — Pal. Cal., Vol. I., p. 121, pi. 20, fig. 78. 



Middle Shales, Division D, north-west side of Hornby Island (one 

 specimen.) Productive Coal Measures, Division A, of the Sucia Islands, 

 abundant, perfect and well preserved; J. Eichardson, 1872 and 1874. 



This species is one of the most fi-equent and characteristic fossils of 

 the Cretaceous rocks of the Sucia Islands. In the writer's judgment, it 

 is a very typical Margarita, and Mr. W. H. Dall, who has seen the 

 specimens, is of the same opinion. 



Stomatia Suciensis. (N. Sp.) 



Typical form, plate 16, figure 4. Variety carinifera, plate 16, figure. 5. 



Typical form. — Shell subovate, longer than wide, pointed above and 

 more or. less narrowly rounded below ; spire short, about one-fifth the 

 entire length. Whorls four, increasing very rapidly in size, convex, 

 oblique ; sutures distinct. Spire turbinate conical ; body whorl very 

 oblique, moderatelj' inflated, devoid of any umbilicus or umbilical 

 depression, sometimes subangular near the base. Aperture ovate, longer 

 than wide, pointed above and rounded below ; outer lip thin, simple, 

 gently convex ; inner lip concave. 



The surface of the last whorl is marked with rather fine, rounded, 

 revolving ribs, which are wider than the impressed lines between them, 

 and by coarse, irregularly disposed, transverse striai of growth, some of 

 which, in one specimen at least, are developed into nodular folds near 

 the base of the shell. 



Variety carinifera. — Shell wider than high; spire extremely low; 

 body whorl obliquely compressed above, anguluted below the middle, 



