918 



C. MOORE ON THE PALEONTOLOGY 



? Lagena lsevis, Walker. 

 Marginulina raphanus, Linnd. 



tenuissima, Beuss. 



? Nodosaria prismatica, Reuss. 



raphanistrum, Linne. 



tetragona. 



Nummulite ? 

 Planularia arguta. 



pauperata. 



Planorbulina ammonoides. 

 Pleurostomella fusiformis, Eeuss. 

 Pulvinulina caracolla, Bom. 



Scalpellum magnum, scutes and ros- 

 tral latus. 

 Crustacea, claws of. 

 Cy there ornatissima, Eeuss. 



quadrilatera, Bom. 



Polycope, sp. 



Macrocypris? arcuata, Munst. 

 ? Cytheridea perforata, Bom. 

 Cytherella ovata, Bom. 



Miinsterii, Bom. 



Beyrichii, Beuss. 



Williamsonii, Jones. 



Cythere concentrica, Beuss. 



quadrilatera ? 



Paracypris ? gracilis, Jones, sp. 



Pecten. 



Pinna. 



Ostrea. 



Various small univalves. 



Turbo, sp. 



Hamites. 



Fish remains. 



Ooprolites, with scales, &c. 



Quinqueloculina, sp. 

 Textilaria agglutinans, var. paral- 

 lela, Beuss. 



(Proroporus) Schulzei, Beuss. 



Trochammina incerta. 

 Vaginulina recta. 



truncata. 



Verneuilina triquetra, Munst. 



Bronni, Beuss. 



Smilotrochus. 

 Ophiura, joints of. 



The Lower Greensand and Lacustrine Deposits. — Beds of oolitic 

 limestone intervene between the Gault and the 50 feet of Creta- 

 ceous deposit lying above the Devonians. Whilst lithologically this 

 differs from the Gault, a greater change takes place in its palaeon- 

 tology ; and there is probably an unconformability between these 

 two Cretaceous divisions. On looking at the samples in block, few 

 remains are visible ; but by dissolving and washing the least indu- 

 rated portions many organisms are released from a limy coating, 

 which passes off with the water, and the deposits are then found to 

 be half composed of them. Prominent amongst these are many joints 

 of Pentacrinites Fittoni, plates and spines of Echini of several species, 

 joints of Ophiura, plates of Marsupites, valves of Cirripedia, &c, all 

 of which are dismembered ; and all other genera of any size seem 

 to be very fragmentary. In contrast with the Gault, which yielded 

 so many Bbizopoda, only four genera occur — and these, except Gar- 

 penteria referred to below, species recurrent from beds as low as the 

 Lias ; many Entomostraca and very small crustacean claws are 

 plentiful, and Polyzoa equally so ; but of corals I have found only a 

 single fragment. Tcrebratulce occur either as fry or dwarfed speci- 

 mens ; Rhynchonella latissima is usually crushed ; also Thecidium 

 and Zellania hereafter mentioned. The Conchifera are few in 

 number, and from their worn and fragmentary state are in an un- 

 satisfactory condition for specific identification. The same remark 

 applies to the Gasteropoda, of which there are about twenty genera ; 

 many of them are very dwarfed, and show such signs of rolling and 

 abrasion as to render them unrecognizable. Some of them, espe- 

 cially the Cerithiidse, which are numerous, whilst being carried about 

 as dead shells by the water of the period, have become encased in 

 a tufaceous covering of carbonate of lime which entirely conceals 

 . their shells. 



