308 The Lower Devonian Fauna of Torquay. 



Platyceras clorsicarina Fuclis. 



The internal cast of a large species of Platyceras from Kilmorie 

 which seems identical with PI. clorsicarina Fuchs/ of the Rhenish 

 Lower Devonian shows the typical tall narrow compressed shape, 

 the sharp caruaation of the dorsum and the large high slightly 

 twisted pointed apex, as Fuchs illustrates. It is allied to 

 PL Zinkeni (A. Roem.)^ of the Harz. 



Dimensions. — Height, c. 43 mm. Diameter (anterior-posterior), 

 c. 22 mm." ; ditto (transverse), c. 10 mm. 



Horizon. — Meadfoot Beds. 



Locality. — Kilmorie (S. 74). 



BellerojjJion (Pedasiola) aff. tumidus (Sandberger) ? 



Description. — Shell small, coiled in flat spiral, somewhat com- 

 pressed, composed of four whorls rather rapidly increasing in size 

 and especially in height towards the mouth. Dorsum narrowly 

 rounded, strongly convex, trilobed faintly by a pair of rather 

 weak revolving grooves, the median dorsal portion being strongly 

 elevated and about twice the width of the lower lateral portions. 

 Umbilical edge angulated ; umbilical slope steep, abrupt ; umbilicus 

 rather large, open, exposing all the whorls. Slit-band absent ? 



Horizon. — Meadfoot Beds. 



/.oca%.— Meadfoot, Torquay (M.P.G. ff). 



Rem.arhs. — The above described single specimen of a Lower 

 Devonian Bellerophontid in the form of an internal cast which is in 

 the Jermyn Street Museum, seems to be Phillips' figured but 

 undescribed specimen, named by him B. trilohatus Sow. var. ft.^ 

 It is undoubtedly distinct from this Silurian species, but possibly 

 is referable to one of the varieties of B. tumidus Sandb.,^ which is 

 usually placed now in the genas or subgenus Plectonotus Clarke,® 

 which owiag to the possession of a slit-band is separable from 

 the true Bucaniella. Fuchs,^ however, still includes this species 

 in the subgenus Bucaniella, which he spells Bucanella. Spriesterbach ^ 

 has suggested a new generic name, Pedasiola, for very similar 

 trilobed Devonian species with an expanded mouth, including 

 Balpingostoma iripleura Fuchs.® Dahmer ^ has recently described 



^ Fuchs, Abh. k. 'jpreuss. geol. LandemnsL, .N.F., Heft Ixxix, 1915, p. 6-1, 

 t. xiii, figs. 14-17. 



2 A. Roemer, Verstein. Harzgeb., 1843, p. 27, t. vii, fio;. 4 ; Kayser, Abh. 

 geol. .spec. Kart. Preuss., ii, Heft iv, 1878, p. 9.3, t. xv, figs. 5-7. 



^ Phillips, PalcEoz. Foss. Dev. Gornw., p.^107, pi. xl, fig. 2006. 



* Kegel, op. oit., p. 42. 



^ Clarke, Foss. Dev. Parana, Mon. Sen. Geol. Miner. Brasil, vol. i, 1913, 

 pp. 167-70. 



® Fuclis, op. cit., p. 61, t. xiii, figs. 3, 5, anrl references. 



"^ Spriesterba3h and Fuchs, Abh. preuss. geol. Landesanst., N.F., 

 Heft Iviii, 1909, p. 75. 



^ Ibid., p. 75, t. ii, figs. 1, 2. 



^Dahmer, Jahrb. preuss. geol. Landesanst., f. 1919, Bd. xl, 2, Heft 2, 

 {1921), p. 227, t. vii, figs. 10-12. 



