ORTHOCEKATIDJi. 
87 
Orthoceras (?) tentaculare, Phillips. 
1841. Orthoceras tentaculare, Phillips, Pal. Foss, of Cornwall, Devon, 
and West Somerset, p. 112, pi. xliii. f. 210, a-e. 
1868. Orthoceras tentaculare, Holl, Quart, Journ. Geol. Soc. vol. xxiv. 
p. 436. 
8i). Char. “ General figure a slender, elongated cone (some 
specimens arcuate near the apex) ; surface anuulated by oblique, 
prominent (granulated ?) ridges, distant about -25 diameter ; section 
nearly circular ; septa apparently distant as much as one or more 
than one diameter of the shell, most distant in young specimens ; 
siphuncle (?).” {Phillips.) 
Remarhs. I cannot help sharing in the doubt felt by Professor 
Phillips, when this form first came under his scrutiny, as to what its 
affinities might be ; but as he may have had better specimens than 
those I have access to, I give the species for the present the generic 
position he assigned to it. 
Horizon. Middle Devonian (Lower Slates ?). 
Locality. Mudstone Pay, near Torquay, Devonshire. 
A small slab with numerous specimens in it, presented by J. E. 
Lee, Esq., F.S.A., F.G.S. 
Orthoceras tnbicinella, Sowerby. 
1840. Orthoceras tuhicinella, Sowerby, Trans. Geol. Soc. 2nd series, 
vol. V. p. 703*, and Expl. of Plates, v'vc. pi. Ivii. f. 20. 
1841. Orthoceras tuhicinella, Ifiiillips, Pal. Foss, of Cornwall, Devon, 
and West Someiset, p. 112. pi. xliii. f. 211. 
? 1843. Orthoceras tuhicinella (var.), I’orllock, Kep. on the Geol. of 
Londonden-y, p. 367, pi. xxv. f. 4. 
1856. Orthoceras tuhicinella, Sandberger, Die Verstein. Nassau, p. 169, 
Taf. xix. fi‘. 6, 6«, 6«/. 
^p. Char. “ General figure slowly tapering ; surface ornamented 
with prominent, transverse, oblique rings, which are crossed by 
numerous thread-like ribs; section circular; siphuncle (?).” {Phillips.) 
Remarks. The septa are seen in a longitudinal section of a 
specimen in the National Collection. They are from 1^ to 2 lines 
distant, the diameter of the shell being 6 lines. 
Horizon. Middle Devoniau (Great Devon Limestone?). 
Locality. Newton Abbot, Devonshire. 
Kepresented in the Collection by a few small specimens. 
Orthoceras^ sp. 
(Cf. Orthoceras simplicissimum, Sandberger, Die Verstein. Nassau, 
p. 172, Taf. XX. f. 7.) 
