Vol. 52.] OF THE CHALK ROCK* 81 



Draschei, from the Gosau Beds, is probably identical with joeramplus, 

 but the suture-line is rather different. 



The older individuals of P. jperamplus resemble closely MantelTs 

 Am. leivesiensis ; but, according to Sharpe, 1 ' the young of the two 

 species have no resemblance, A. lewesiensis being nearly smooth, 

 and the other ornamented with numerous ribs.' 



The types of Pachy discus peramplus cannot be identified with 

 certainty, since Mantell gave no figures ; but specimens in his 

 collection in the British Museum agree well with his description. 

 Sowerby's specimen is not in the British Museum, nor is the one 

 figured by Dixon. One of the examples figured by Sharpe is in the 

 Museum of the Geological Society ; and of the others, which were 

 collected by Mr. W. Cunnington, one (fig. 3) is in the British 

 Museum. 



Distribution. — England : Middle Chalk. Chalk Eock of Win- 

 chester, Am Hill near Warminster, Aston Eowtant, Prince's Eis- 

 borough, Berkhampstead, Boxmoor, Luton railway- cutting, Dun- 

 stable, Hitchin, Barkway, Eeed near Eoyston, and Underwood Hall 

 near Dullingham. 



France : zones of Rh. Guvieri and P. peramplus in the Loir-et-Cher, 

 zone of Ter. gracilis east of the Paris basin, zone of Epiaster brevis 

 at Fontaine-les-Vervins, zone of Micr. breviporus in the Yonne. 

 Switzerland : Alps of Appenzell. North-western Germany : common 

 in the zone of Het. Reussianum and found near Salzgitter, at 

 Heinigen near Borsum, Klein-Dohren near Liebenburg, and Eheine 

 in Westphalia. Eare in the zone of Inoc. Brongniarti, at Buren in 

 Westphalia, etc. Also rare in the zone of Inoc. Guvieri of Eothen- 

 felde, and Windmiihlebergen near Salzgitter. Saxony: Planer- 

 Kalk of Strehlen and Weinbohla. Inoc. labiatus-heds of Eottwerns- 

 dorf and Leutewitz. Silesia : Scaphites-'beds of Oppeln. Bohemia : 

 Eanges through the Turonian and the Priesen Beds, found at 

 Teplitz, Lenesic, Lobositz, Popelz, etc. Bavaria : Kagerhoh Beds 

 of Galgenberg, Winzerberg, and Kagerhoh. 



[Systematic position uncertain.] 

 Genus Scaphites, Parkinson, 1811. 

 Scaphites Geinitzi, D'Orbigny, 1850. (PI. III. figs. 5-7.) 



1840. Scaphites cequalis, H. B. Geinitz, ' Charakt. der Schichten u. Petrefacten 

 der sachsischen Kreidegeb.' Heft 2, p. 40 ; 1845. A. E. Reuss, ' Verstein. bohm. 

 Kreideformat.' p. 23; 1846. H. B. Geinitz, 'Grundriss der Versteinerungskunde/ 

 p. 301, pi. xii. f. 1 (partim) ; 1850. H. B. Geinitz, ' Das Quadersandsteingebirge 

 oder Kreidegeb. in Deutschland,' p. 116 (partim) ; 1852. C. G. Giebel, ' Fauna der 

 "Vorwelt/ vol. iii. p. 331 (partim). 



1841. Scaphites costatus, F. A. Romer, 'Verstein. norddeutscb. Kreidegeb.' p. 90; 

 1842. H. B. Geinitz, 'Charakt. der Scbicbten u. Petrefacten der sachsisch.-bohm. 

 Kreidegeb.' Heft 3, p. 67 ; 1865. F. A. Romer, ' Die Quadraten-Kreide des Sub- 

 merberges bei Goslar,' Palaeontograpbica, vol. xiii. p. 198. 



1841. Ammonites Cottce, F. A. Romer, ' Verstein. norddeutsch. Kreidegeb.' p. 86, 

 pi. xiii. f. 4 ; 1845. A. E. Reuss, ' Verstein. bohm. Kreidef.' p. 21, pi. vii. f. 11. 

 1850. Scaphites Geinitzi, A. d'Orbigny, ' Prodrome de Paleont.' vol. ii. p. 214 ; 



1 Sharpe, 'Foss. Moll, in Chalk of England (Ceph.),' p. 46. 

 Q. J. G. S. No. 205. g 



