152 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XL 



Page. 

 Schlosnbachia oregonensis, sp. nov. 122 



After J. P. Smith, Journ. Morph. Vol. XVL 1899, Plates A and B. 



Figs. 204-206. Protoconch, phylembryonic to ananepionic. Y- 



Figs. 207-208. Phylembryonic to paranepionic; diameter 0.58 mm.; 

 one-half whorl, first eight septa, glyphioceran stage 

 at the sixth. V. 



Fig. 209. Paranepionic, glyphioceran substage; diameter 0.64 



mm.; third to tenth septa, five -eighths of a 

 whorl. Y- 



Figs. 210-211. Phylembryonic to paranepionic, glyphioceran sub- 

 stage; diameter 0.68 mm.; three-quarters of a 

 whorl, nine septa, 'j . 



Figs. 212-213. Paranepionic, paralegoceran substage; diameter 2.25 

 mm.; two and three-eighths whorls, --f. 



Figs. 214-215. Ananeanic, Parastyrites stage; diameter 3.70 mm.; 

 three and one-fourth whorls, j'. 



Fig. 216. Paranepionic, glyphioceran substage; diameter 0.74 



mm.; seven-eighths of a whorl. \". 



Figs. 217-218. Paranepionic, transition from glyphioceran to gastrio- 

 ceran substages; diameter 1.20 mm.; one and 

 three-eighths whorls, y. 



Figs. 219-220. Paranepionic, transition from glyphioceran to gastrio- 

 ceran substage; diameter 1.33 mm.; one and five- 

 eighths whorls. Y- 

 Paranepionic, gastrioceran substage; diameter T.65 



mm.; one and seven-eighths whorls. Y- 

 Ananeanic, Styrites stage; diameter 3. 10 mm. ; two and 



seven-eighths whorls. Y^- 

 Metaneanic, advanced adolescent stage; diameter 

 5.60 mm.; three and three-quarters whorls, show- 

 beginning of ribs at a diameter of 4.70 mm. Y- 



