BY THE REV. J. E. TENISON-WOODS. 



19 



This fossil occurs in the Murray beds, according to Prof. Tate 

 who also considers that the drawing does not represent the shell 

 in the manner it is familiar to him. The whorls are more 

 numerous and not so regularly increasing in size. I believe 

 that this fossil has a wide vertical as well a horizontal range. 



Oylichna exigtja. PI. 2, fig. 6. 

 This fossil I have figured as one of those specimens which may 

 perhaps be identified with Quoy and Q-aimard's shell, C. arachis. 

 It is very much smaller, is highly polished, the apical foramen 

 much larger in proportion to the size, the umbilicus marked . 

 The resemblances are the general form and the peculiar spiral 

 undulating lines. The latter feature may however be common 

 to more than one species. A shell of the size and the peculiar 

 ferruginous periostrata of the existing Cylichna arachis, I have 

 not met as a fossil at Muddy Creek. If the specimen figured be 

 not new I propose for it the name of variety — exigua. It should 

 be further remarked that in the fossil the apex is flat, obliquely 

 truncate, the labrum remarkably posteriorly produced, and the 

 spiral grooves are well marked, deep in proportion to the size 

 and not so numerous. 



Explanation of Plates. 



Plate I. 



Fig. 1. — Eulima Dance, enlarged. 



2. — Leiostraca acutisjjira, enlarged. 



3. — Conns pull ulascens, much enlarged. 



4. — Conus pullulascens, worn specimen, much enlarged. 



5. — Leda lucida, much enlarged. 



6. — ]\ T iso psila, much enlarged, 



7. — Crossea parvida, much enlarged. 



8. — Trivia mimima, a. seen from above, b. mouth, much 



enlarged. 

 9. — Cerithium eusmilia, much enlarged. 

 10. — Triforis IVrfkinsoni, much enlarged. 



