398 Dr. F. A. Bather on British Fossil Crinoids : 
J. Woodward, 1728. ‘ Catalogue of the Additional English 
Native Fossils &c.,’ tome ii. p. 51. 
Pentacrinites subbasaltiformis, provisional name for stem-fragments 
obtained by J. Sowerby at Islington; also said to occur at Rich- 
mond and Kensington; incompletely described. J. 8. Miller, 1821, 
‘Nat. Hist. Crin.,’ p. 140. 
Pentacrinus subbasaltiformis Miller, J. de C. Sowerby in Wetherell, 
1840, ‘ Observations on a Well dug on the South side of Hampstead 
Heath,’ Trans. Geol. Soc., (2) v.-p. 186, pl. vill. fig. 3 @ (non 5 d). 
Pentacrinus sowerbiit (Wetherell MSS.), J. de C. Sowerby, pag. cit. 
lL. vu. fig. 4. 
Powis subbasalliformis Miller, T. & T. Austin, 1847, ‘ Monogr. 
Crinoidea,’ p. 122, pl. xvi. fig. 2. 
Pentacrinus sowerbiit Wetherell [sic], T. & T. Austin, op. eit., p. 128, 
pl. xvi. figs. 3a, 3. 
The Austins’ figures all appear to be exceedingly bad copies of 
Sowerby’s. They add no fact except that P. subbasaltiformis has 
been recorded from Herne Bay. 
Pentacrinus subbasaltiformis Miller, E, Forbes, 1852, ‘ Palaeont. Soc. 
Monogr. Tertiary Echin.,’ p. 34, pl. iv. figs. 8, 9, 10. 
Pentacrinus sowerbii Wetherell [sic], E. Forbes, op. cit., p. 35 and text- 
figs. 2a, b, c on p. 36. 
It is a little difficult to say what should be the Holotype. 
If Miller’s incomplete and unillustrated reference, which he 
says was purposely not intended as a diagnosis, were to be 
accepted, then the stem-fragments supplied to him by 
J. Sowerby would be syntypes; but these, if they are 
extant, certainly cannot be identified. It is therefore 
simpler to start from J. de C. Sowerby ; and in this case 
one would naturally take the specimen from the Wetherell 
Collection which he figured. This should be in the British 
Museum, but I am unable to find any specimen from Hamp- 
stead agreeing with the drawing. I therefore fix on 
no. 57540, which is certainly a syntype of J.de C. Sowerby’s, 
and may legitimately be made the Lectotype. This specimen 
is a fragment in matrix, and comprises parts of two inter- 
nodes meeting at a syzygy, one part 18°8 mm. long, including 
9 columnals, the other 87°5 mm. long, including 19 
columnals ; there are two cirrus-facets at the syzygy. 
The material studied consists of some seventy stem- 
fragments in the British Museum (Natural History), 
obtained from the collections of J. S. Bowerbank, F. E. 
Edwards, N. T. Wetherell, E. Spencer, Toulmin Smith, 
R. Maitland, James Baber, and W. Mellis. They come from 
the London Clay of the following localities :—Bracklesham 
Bay, Sheppey, Harwich, Sewardstone in Essex, and in the 
London area—Hampstead including the famous well (Trans. 
Geol. Soc. 1840) and the cutting of the London & North- 
