PALAEONTOLOGY. 139 



lowing as among those obtained, reserving the more 

 doubtful forms for future identification : 



Ammonites varicosus. Solarium ornatum. 



splendens. Plicatula pectenoides. 



rostratus. Avicula gryphseoides. 



Hamites sp. ? Inoceramus sulcatus. 



Belemnites attenuatus. Nucula pectinata. 



Eostellaria sp. ? Pentacrinus Fittoni. 



We also secure a few of the different forms of the 

 phosphate nodules from the seam or band in which they 

 were noticed to occur. 



It is not always, however, that a clay-pit is so fossil- 

 iferous as that described above ; indeed, if the workmen 

 happen not to have any specimens on hand, as is often 

 the case in summer-time, little else may be obtained 

 from such gault-pits than a few Ammonites, Belemnites, 

 Plicatulse, and phosphate nodules, though a regular seam 

 of the last is tolerably sure to afford a more or less 

 abundant and well-preserved fauna. 



(c.) At the well we are not likely to obtain any fossils 

 unless some of the clay which was extracted still remains 

 near the mouth, or the well-sinkers happen to have kept 

 any specimens from the beds passed through. 



(d.) The chalk-pit must be examined carefully, for it 

 is not so easy to detect fossils in the upper chalk as it 

 is in most other secondary rocks ; the remains are nearly 

 of the same colour as the rock itself, and this is of such 

 dazzling whiteness that looking closely at it in bright 

 sunshine is very trying to the eyes ; however, we must 

 first betake ourselves to a shady part, and get gradually 

 accustomed to the glare. 



