J. p. Johmon — Cretaceous Rocks of Glynde. 249 



below, and in the lower position of the slit-band and its minute 

 characters. The slit-band, in fact, resembles more closely that of 

 PL bicincta (Hall) ^ than that of any other species in the presence 

 of the keel along the middle of the band and its sharp borders. 



EXPLANATION OF PLATE XI. 



Fig. 1. — Plcurotomaria cijclonema, Salter, sp. Nat. size. 



Fig. 2. — Ditto, showing mouth. Nat. size. 



Fig. 3. — Ditto, slit-baud, x 5. 



Fig. 4. — Pleurotomaria Fletcheri, Salter. Nat. size. 



Fig. 5. — Horiostoma discorx, var. Maria, Salter, sp. Nat. size. ' 



Fig. 6. — Ditto, umbilical surface. Nat. size. 



III. — Some Sections in the Cretaceous Eocks around Glynde, 



AND their Fossil Contents. 



By J. P. Johnson. 



IN the memoir recently published by the Geological Survey ^ on 

 the Selbornian strata of England, no mention is made of an 

 interesting section in the Gault near Glynde, which was certainly 

 in existence up to 1898, when I last visited the district. The object 

 of the present note is to put this section on record, together with 

 some observations on two chalk quarries, from which I have at 

 various times collected fossils. 



The pit in the Gault is situated on private land about a quarter of 

 a mile from the railway station, with which it is connected by 

 a railroad. As far as I can remember, it showed some 15 feet of 

 slate-blue clay, containing an abundance of pyrites, and consequently 

 a quantity of selenite, though in small crystals. The only organic 

 remains that wei'e at all plentiful were the ammonites, Schlcenbachia 

 varicosus, Hoplites denarius, and AncijJoceras spiniijerum. The 

 finding of a big tooth of Pvolospliijrcena ferox is noteworthy. 



The large quarry in the Chalk at the railway station exhibits 

 a fine section of the well-known limestone, which here contains 

 a very small proportion of clayey matter and occasional nodules of 

 marcasite. It is of Cenoraanian age, as shown by the occurrence of 

 Schloenbachia varians. The commonest fossils are the Selachian 

 remains, amongst which I may especially mention a nice series of 

 the teeth of Scaphanorhynchus siibidatus and forty-seven associated 

 teeth of Ptychodus decurrens. It was from here that I obtained the 

 fine mandibular ramus of Pachyrhizodus Gardneri which is in the 

 British Museum. 



Just outside the village, on the right-hand side of the road to 

 Lewes, and joined to the above-mentioned quarry by a railroad, 

 is another large excavation in the Chalk. This is at a higher level, 

 and is in the face of the escarpment. The Chalk differs from that 

 already described in being free from argillaceous matter; it also 

 yields nodules of marcasite and, in the topmost beds, a few flints. 

 It is mostly of Turonian age, as shown by the abundance of 

 Rhynchonella Cuvieri, Inoceramus mytiloides, I. Cuvieri, and Lima 



* Lindstrom: op. cit., p. 106, pi. viii, figs. 21 and 23. 



* " The Cretaceous Rocks of Britain," vol. i (1900) ; by A. J. Jukes-Browue. 



