CYLINDRITES. 97 



Acteonina cinerea, Hudleston. Plate IX, fig. '.). 



1885. Acteonina cinerea, Hudleston, Geol. Mag. [3], vol. ii, p. 206, pi. v, fig. 8. 



Type.— "Height 26'5 mm. Width to height '51. Spiral angle 90°. Body 

 whorl to height -80. . . . Whorls . . . about •">. Devoid of ornament. 

 Suture distinct. Shoulder of body whorl extremely broad and square Body 

 whorl relatively large and cylindrical, sides compressed and almost constricted just 

 below the shoulder. . . . Outer lip very straight." [The remainder is ex- 

 pressed with doubt.] From the Scarborough Limestone. In the Sedgwick Museum. 



Description . — Hudleston remarks that " there is a very stout variety apparently 

 belonging to this species, in Mr. Leckenby's Cornbrash Collection." The specimen 

 here figured (PI. IX, fig. '■]) is probably the one intended ; at all events, it 

 approximates to this species more than any other specimen. It is characterised 

 by its large spiral angle, the shortness of the upper whorls exposed, the angularity 

 of the shoulder, the constriction of its sides and enlargement of the body whorl 

 towards the base, and the sudden inward bend there, so that the inner line of the 

 aperture crosses the axial line at an angle of nearly (50°, and the outer side turns 

 through an angle of more than 70°. The base of the shell, in fact, is very peculiar. 



Distribution. — This specimen from the Cornbrash of Scarborough is perhaps the 

 only one seen. 



Relations. — See under J. scarburgensis. 



In the British Museum are two specimens obtained from Chippenham through 

 Mr. Wm. Buy, which closely resemble large examples of A. luidii. They are 

 said to have come from the Cornbrash, but as they must have come out of 

 excavations their horizon remains doubtful. See Plate IX, fig. 4. 



Genus CYLINDRITES, Morris and Lycett. 



Shell smooth, last whorl cylindrical, aperture lengthened, columella twisted 

 near the base. The records are : 



*C. excavatus (36) * C. thorenti (35) 



The record of ( '. excavatus is by Phillips, as occurring at Kidlington. The only 

 Gylindrites in the Oxford Museum lias no label of locality, though placed with the 

 Cornbrash fossils, and it is C. acutus. It is to be noted that all Phillips' fossils 

 that come from Kidlington are called " B," though there are lower fossiliferous 

 strata in the quarry. It is probable, therefore, that no G. excavatus has as yet 

 been found in the Cornbrash. 



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