142 



Remarks. — The shell is^ glossy olive - green, blotched with 

 olivaceous cuneiform dashes. 



10. Lepidopleurus, sp. indet. 



One median valve. 



The sculpture in good preservation, although the lateral area& 

 are broken away. 



Color. — Creamy white. 



Lateral Area. — Raised, ornamented with six regular, radial 

 rows of flattened granules. These are large at the girdle, and 

 gradually diminish towards the jugum. 



Pleural Area. — Sculptured with 16 rows of granulose-longi- 

 tudinal ribs. The interspaces double in width as they approach 

 the anterior margin. 



Dorsal Area. — Much worn. 



Inside. — The sinus appears to have been wide and shallow. 

 The usual diagonal rib is much raised and rather curved. 



Measurement. — The valve is 2 mm. longitudinally, and about 

 ih mm. in breadth ; divergence, 100°. 



11. Isehnoehiton, sp. indet. 



Six median valves from Muddy Creek. 



The lateral, pleural, and dorsal areas contain a series of 20 to 

 30 rows of minute triangular pits, converging towards the apex, 

 and having a confluent tendency. 



The sinus is about 5 mm. The side slopes are slightly curved. 

 The dorsal area is decidedly beaked, some of the valves being 

 7 mm. in length; divergence, 95° to 110°. 



Remarks. — It is extremely doubtful whether these specimens 

 are referable to the above genus, but without better material it 

 is impossible to be certain. 



12. Chiton, sp. indet. 



One valve, very much worn. 



The lateral area distinctly raised, with three or four deep 

 sulcations. 



The dorsal area is 9 mm , and has a decided beak. 



Width of valve, 17 mm.; divergence, 95°. 



The side slopes are slightly curved outwards. 



A strong costa in the articulamentum runs up to the dorsal 

 area. 



The contour of this valv^e approaches that of valve two of 

 Plaxiphora petholata, Sby. 



Locality. — Muddy Creek. 



13. Isehnoehiton, sp. indet. 

 One median valve from Muddy Creek. 

 The areas are indistinctly marked. 



