l82 EXCAVATION AT WATER WORKS PUMPING STATION. 



sediment 5 examples of Avicida contorta, and Placimopsis alpina 

 \vere particularly abundant and good. 



The next beds we must notice are in the table united by a 

 bracket, these are considered estuarine, they are light buff colored 

 thin limestones with clayey partings. The elytra of insects, which 

 seem to occur in more than one bed, and that of Esiheria minuta, 

 are the reason of its being so classed. These Crustacea I have 

 found on Montpelier Hill in abundance (where the Rhaetic section 

 is very similar) ; doubtless this bed may have been observed in 

 intermediate position by others, e.g., it ought to occur on the 

 slopes of the Gotham ridge. It should be well searched for 

 insects if any exposure of it is seen. 



In the clays above I found no fossils. The " Gotham Marble," 

 or *' landscape-bed " is well developed ; it contains lish-scales, &c., 

 as at Aust. The top of the section, i.e., all above the landscape- 

 bed are classed as planorbis-zone. This bed is the most convenient to 

 choose as division between the Rhaetic and L. Lias. In the land- 

 scape-bed we have the Saurichthys so abundant throughout the 

 Rhaetic, while it has Pholidophorus Higginsi, nitidas and Legnonotus 

 Cothamensis peculiar to itself. Some remains of the latter rare fish, 

 3 or 4 mandibles and crushed scales, I found last year in this bed 

 at Aust. That the peculiar surface of the bed is not due to erosion, 

 has been noticed by Mr. Woodward, (Mem. Geol. Survey, 

 Somersetshire, 1S76, p. 73.) 



