Vol. 57.] FROM THE ISLAND OE ARRAN. 235 



There are six specimens from Arran which are referred to this 

 species, as they undoubtedly agree with Prof. Tate's types. Most of 

 them have the rostram broken, but one remains perfect and is of 

 remarkable length, although the shell is small. 



I^FCTJLANA sp. (cf. Leda Quenstedti, Tate). (PI. IX, fig. 13.) 



Two or three internal casts agree very nearly with the Leda 

 Quenstedti of Prof. Tate,* but the rostral portions being less deep 

 and the lower margin more curved, they cannot be placed definitely 

 with that species. 



Messrs. Tate & Blake ^ included L. Quenstedti, Tate, withZ. Galathea, 

 d'Orb., but the Yorkshire specimen, which they figure from the 

 Middle Lias (op. cit. pi. xi, fig. 5), is certainly not the same form as 

 that described from Antrim ; and it is by no means sure that either of 

 them is the L. Galathea of d'Orbigny or the iV. hifleooa of Quenstedt. 



The specimen figured by Messrs. Tate & Blake is from the Middle 

 Lias of Cleveland, and may be known as Nuculana G-alaihea, Tate & 

 Blake (? d'Orb.). Other specimens in the Tate Collection in the 

 Museum of Practical Geology, from the Lower Lias of Eedcar and 

 Marske, as well as some from Garron near Belfast, are clearly 

 the form described and figured as Leda Quenstedti by Prof. Tate, 

 and it is with these that the Arran specimens so nearly agree. 



Cardinia Listeri (Sowerby). (PI. IX, figs. 15 & 16.) 



1818. TTnio Listeri, * Min. Conch.' pi. cliv, figs. 1, 3, & 4. 



A portion of the exterior of a characteristically marked valve of • 

 this common shell, and an internal cast showing the hinge-teeth are 

 good evidence of the presence of this species in Arran. C. Listeri 

 has been found in Ammonites planorhis- and Amm. angulatus-heds 

 near Belfast, and at these and higher horizons in England. 



AsTARTE sp. 



Several imperfect casts of a small Astarie^ with coarse concentric 

 ridges, cannot be specifically named. 



Cardita Heberti, Terquem. (PI. IX, fig. 11.) 



1855. ' Paleont. de la Prov. de Luxembourg & de Hettauge ' Mem. Soc. Geol. 

 ^France, ser. 2, vol. v, p. 302 & pi. xx, fig. 10, 



1870. Tate, ' Irish Liassic Fossils ' Rep. Belfast ^at. Field Club, App. i, p. 11. 

 1876. Tate & Blake, ' Yorkshire Lias ' p. 388. 



An internal cast, 11 mm. wide and about 9 mm. high, with 

 creniilated margin, radiating costae, and three concentric ridges, 

 agrees better with the above species than with the G. multicostata 

 of Phillips. Two less perfect specimens may likewise be referred 

 to this species. G. Heberti has been recognized in the Ammonites 

 angulatus-heds in the North of Ireland, and at the same horizon, 

 as well as in Amm. BucJcIandi-heda, in England. 



1 ' Irish Liassic Fossils' Rep. Belfast Nat. Field Club, App. i (1870) pi. i, fig. 4. 

 * ' Yorkshire Lias ' 1876, p. 383. 



r2 



