from the Manchester Museum. 405 



Cephalopoda. 



Glyphioceras phillipsi, Foord & Crick (?). I have in my possession 

 a small fragment of a Glyphioceras from the Marine Band, River 

 Tame, Dukinfield, which suggests reference to this species on account 

 of its ornament. The fragment appears to be pretty close to the 

 aperture, and the test is ornamented with fine striae, slightly waved 

 on the side, curved forward near the periphery and on the latter 

 forming a deep broad sinus. 



Gastrioceras carlonarium (Yon Buch). A fragment of a whorl 

 exhibiting the tuberculated umbilical margin is referred to this 

 abundant Lower Coal-measures form. It was obtained by me from 

 the same band as the above-mentioned Glyphioceras. 



Dimorphoceras gilbertsoni (Phill.) (?). This species appears to be 

 represented in the Ashton Moss Marine Band by several immature 

 examples in a small fragment of rock collected by Mr. R. Cairns. 



Pleuronautilus costatus, Hind. 1 Two imperfect Nautiloids from the 

 Marine Band, Ashton Moss Colliery, collected by George Wild, are 

 considered by Dr. Hind to be identical with his species from below 

 the Grin Mine Coal, North Staffordshire Coal-field. One much-crushed 

 specimen is very like his fig. 5a of pi. xxxvi 2 ; the other is an 

 uncrushed fragment of the body-whorl displaying very clearly the 

 ornamentation of the shell. It would be interesting to know the 

 relation of this species to Pleuronautilus rotifer (Salter), recorded 

 from the same Marine Band. 3 



Orthoceras spp. At least two forms of Orthoceras occur in the 

 Marine Band at Ashton Moss and Dukinfield, both of which are 

 represented in the Wild, Grundy, and Cairns Collections in the 

 Manchester Museum. 



The commonest form would clearly come under ProfessordeKoninck's 4 

 division " Orthocerata, 1st Lsevia, A. gracilia", as the shell appears 

 to possess a cylindrical siphuncle and a smooth or nearly smooth test. 

 The species somewhat resembles in general form and slenderness the 

 inferior ends of his Orthoceras calamus (pi. xxxviii, fig. 6) [= 0. incequi- 

 septum, Phill.] and 0. martinianum (pi. xliv, fig. 4). 



A similar form, referred by Dr. Hind to Orthoceras aff. asciculare, 

 Brown, 5 is met with in the Marine Band below the Gin Mine Coal, 

 North Staffordshire Coal-field. The identification, however, of the 

 Lancashire and Staffordshire specimens with Brown's species is, in my 

 opinion, very unsafe. The original of his species came from the 

 Pendleside Series, near Todmorden, and formed part of the Gibson 

 Collection. The type-specimen (in the Manchester Museum) has, 

 unfortunately, suffered considerable loss since Brown's time, as it 

 now consists solely of the impression of the original organism on 

 a fragment of black shale. The form, as will be seen by his figure, 6 



1 Q.J.G.S., vol. lxi, p. 540, pi. xxxvi, figs. 5-56, 1905. 

 3 Op. cit. 



3 Geology of the Country around Oldham (Mern. Geol. Surv.), 1864, p. 64, 

 pi. i, fig. 6. 



4 Faune du Cole. Garb, de la Belgique, 1880, p. 50. 



5 Q.J.G.S., vol. lxi, p. 542, pi. xxxvi, figs. 6, 7, 1905. 



,; Trans. Manch. Geol. Soc, vol. i, pi. vii, fig. 39, 1841. 



