Vol. 57.] FEOM THE ISLAND OF ARRAN. 233 



follow Messrs., Tate & Blake in regarding P. subulatus, Goldf., and. 

 P. caJvus, Goldf., as one and the same species. 



Lima pectinotdes ? (Sowerby). (PI. IX, fig. 7.) 



1815. Plagiostoma pectinoides, 'Min. Concli.' pi. cxiii, fig. 4. 

 1870. Lima pectinoides, Tate, ' Irish Liassic Fossils ' Rep. Belfast Nat. Field' 

 Club, App. i, p. 11. 

 1876: Tate & Blake, ' Yorkshire Lias ' p. 367. 



Two or three specimens showing external characters apparently 

 belong to this species, but as the hinge is not seen they may be- 

 Lima. L. pectinoides is very commoni in the Lower Lias. 



Lima stjccin^xa (Schlotheim). (PI. IX, fig. 8.) 



1813. Chamites, ' Leoiihard's Taschenbuch fiir die Mineralogie,.&c.' vol.vii. p. 72: 

 (figured in Kuorr's ' Versteinerungen ' suppl. iii, pi. \-d, fig. 4). 

 1818. Lima' antiquata, Sowerby, ' Min. Conch.' pi. ccxiv, fig. 2. 

 1870. Tate, 'Irish Liassic Fossils ' Kep. Belfast Nat. Field. Club, App. i, p. 11. 

 1876. Tate & Blake, ' Yorkshire Lias ' p. 365. 



A portion of a Lima, showing the wings and having the irregular 

 radiating ribs,, with two or three smaller ribs between them, charac- 

 teristic of Jjima antiquata^ Sow., is referred to this species, which is 

 generally accepted as the same as-Z. succincta of Schlotheim. The 

 characters are not well shown, in the figure. This species is found 

 in Ammonites planorhis- o^ndi. Amm. anr/ulatus-beds near Belfast and' 

 in similar, and possibly higher,, beds in England^. 



Inoceramus (Crenatula) sp. 

 Two or three imperfect internal casts appear to belong to this genus. 



Grtph^a arcuata, Lamarck. (PI. IX, fig. 9.) 



1802. ' Systeme Anim.sans Vertebres ' p. 398. 



1815. G-rt/plicea incuroa; Sowerby, ' Min. Conch.' pi. cxii, figs. 1 & 2. 

 1870. Ostrea arcuata, Tate, ' Irish Liassic Fossils ' Rep. Belfast Nat. Field Club,. 

 App. i, p. 12. 

 1876. Tate & Blake,.' Yorkshire Lias ' p. 359.. 



There are numerous internal and external casts of Gryphcea, and 

 some at least of these, although small,, are evidently Gr.. arcuata/. 

 I None of the examples attain^ to the size ordinarily met with in the 

 I Lower Lias, and it is worthy of note that Messrs. Tate & Blake 

 always found this species dwarfed in the lower part of the Ammo- 

 nites angidatus-heds at Hedcar. 



Gryphcea arcuata has a wide range in the Low^r Lias ; it has 

 been recognized in the Antrim, area in the Ammonites angulatus- 

 beds, but is most common, there and elsewhere in Britain, in the 

 Amm. BucJclandi-heds. 



OsTREA IRREGULARIS (?) QuOUStedt. 



1858. ' Der Jura ' p. 45 & pi. iii, fig. 15. 



1870. Tate, 'Irish Liassic Fossils ' Rep. Belfast Nat. Field Club, App. i, p.. 12. 



1876, Ostrea ungula, Tate & Blake, ' Yorkshire Lias ' p. 358. 



Among the Ostrea-\\\Q internal casts there are one or two which 

 have clearly been attached by a broad, base to some ridged shell, 

 and reproduce the ridges on their upper valves. Shells similar to 



Q. J. G. S. No. 22Q. B 



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