220 Dr. R. L. Sherlock — Foraminifera of Speeton Clay. 



bed is one of the most prolific in Foraminifera. Specimens are very 

 numerous, but the great majority belong to a single species, 

 Pulvinulina caracolla (Eoemer). Although the specimens are often 

 broken, they are on the whole better preserved than in Cg (?). The 

 species are : Reophax scorpnirus, Montfort, Ammodiscus gordialis 

 (Jones & Parker), Lagena globosa (Montagu), L. apiculata, Reuss, 

 L. apiculata, var, danfordi, var. nov., L. Icevis (Montagu), Nodosaria 

 {Dentalma) fontanessi, Berthelin, N. (D.) lorneiatia, d'Orb., iV. {JD.) 

 communis, d'Orb., iV. (D.) roemeri, Neugeboren, Frondicularia 

 gauUina (?), E,euss, Ilarginulina linearis, Reuss, M. jonesi, Reuss, 

 M. delilis, Berthelin, Cristellaria gibha, d'Orh., C. chapmani, sp. nov., 

 C. crepidula (Fichtel & Moll), C. turgidula, Reuss, C. rotulata 

 (Lamarck), Polymorphina fiisiformis, Roemer, P. prohUma, d'Orb., 

 Puhinulina repanda (Fichtel & Moll), P. caracolla (Roemer), and 

 P. lamplughi, sp. nov. 



A minute Bentalium, minute spines of Echinoids, and a few 

 Ostracods were also found. The material contains a little glauconite. 

 All the particles, except the finest, are well rounded, but the 

 Foraminifera, other than P. caracolla, are well preserved. 



Q-^. Many grains of glauconite, some of them obviously internal 

 casts of Foraminifera. A moderate number of Foraminifera were 

 found, almost all of them Cristellarians. The species are : Lagena 

 glohosa (Montagu), L. apiculata, Reuss, Cristellaria aciitauricularis 

 (Fichtel & Moll), C. turgidula, Reuss, and C. rotulata (Lamarck). 



B (base a). Three specimens of the basement beds of B were 

 examined, called a, b, and c, of which a is the lowest. This last 

 material yielded a few decomposed Foraminifera, one being 

 a rotaline form. It is probable that fossils were originally present 

 in fair number, but they have been destroyed by the alteration of 

 the calcite into gypsum. Inoceramus prisms were noted. 



B (base b). Abundant glauconite grains, some of which are 

 obviously the internal casts of Foraminifera. In addition the following 

 shells were found: Nodosaria hispida, d'Orb., Marginulina jonesi, 

 Reuss, Cristellaria cephalotes, Reuss, C. rotulata (Lamarck), Pulvinu- 

 lina caracolla (Roemer). 



B (base c). This horizon is perhaps the richest in Foraminifera of 

 all those examined. In many of the specimens the shells are filled 

 with glauconite and have been partly worn away. Under the 

 microscope the material seems to be made up of small ' pebbles ' of 

 shale, and much of it may be derived from an older deposit. The 

 majority of the individuals are young fry. The species found are : 

 HaplopTiragmium latidorsatum (Bornemann), Textularia agglutinans, 

 d'Orb., Bigenerina nodosaria, d'Orb., Gaudryina filifurmis, Berthelin, 

 Lagena apiculata, Reuss, L. Icevis (Montagu), Nodosaria calomorpha, 

 Reuss, N. {Bentalium) siliqua(?), Reuss, N. (B.) legumen, Reuss, 

 Marginulina glabra, d'Orb., Cristellaria gracillissima, Reuss, C. acut- 

 auricularis (Fichtel & Moll), C. scitiila, Berthelin, C. chapmani, 

 sp. nov., C. crepidula (Fichtel & Moll), C. gaultina, Berthelin, 

 C. sfernalia, Berthelin, C. orbiculata (Roemer), C. rotulata (Lamarck), 

 Polymorphina fusiformis, Roemer, Puhinulina repanda (Ficlitel and 

 Moll), P. caracolla (Roemer), P. lamplughi, sp. nov. 



