58 SYRIAN MOLLUSCAN FOSSILS. 



Cueullaea (Trigonoarca) Ligeriensis D'Orbigny sp. 



Area Ligeriemit D'Orbigny, 1814, Paleout. PranQ., Terr. Cret.., Ill, p. 227, PI. ccexvii. 



A single internal cast, "whose identity is proved by comparison with 

 several excellent and authentic casts from the Tnronian of Sarthe, and the 

 Crate chhrUSe (Upper Greensand) of Rouen. 



Length, G4 mm.; height, 37 mm.; thickness, 41 mm. 



In form this species is very similar to, if not identical with. A. Passyana 

 d'Orb., 1844 (Paleont, Franc., Terr. Cret,. Ill, p. 241, PL cccxxvii, figs. 1, 2), 

 of which, at the time of publication, d'Orbigny knew only the cast. Fraas 

 (Aus clem Orient, I. Theil, p. 89) speaks of A. brevifrons Conrad (Official 

 Report, p. 215. PI. v, fig. 31) as closely resembling A. Passyana ; but if 

 Conrad's figures of Syrian species of Area are at all to be relied on, Passyana 

 and Ligeriensis approach nearest to A. indurata Conrad (op. cit,, p. 21G, PI. v, 

 fig. 33), and may be identical with it. Coll. Merrill. 



Locality and Position. — Beirut district . ; from the Turonian. 



Cucullaea (Trigonoarca) concinna Goldfuss sp. 



Plate VI, figs. 7 a, b, c. 



? Cueullcea Munslerii Zieten, 1830, Versteinerungen Wiirtembergs, p. 75, PI. lvi. figs 7 a—e. 

 Area concinna Goldfuss, 1S3S, Petrefacta Germanise, II, p. IIS, PI. exxiii, figs. a, b. 

 Cueullcea concinna Quexstedt, 1852, Handbucli der Petrefactcnkunde, p. 526, PI. xliii. fig. 21 . 



Thirteen specimens, varying much in size, of which tbe largest is figured. 

 Length, 8.} to 15 mm.; height, 6| to 9 mm.; thickness. 4 to 7 mm. 



These specimens agree perfectly with examples from the Mono* ox- 

 fordiennes of Safins, and with Goldfuss's description and figures. Numerous 

 specimens from de Koninck's collection, now in the Museum of Comparative 

 Zoology, and labelled by him "Area (OuatUcea) Munsterii Zieten," from the 

 Idas in"//' n of Balingen, as well as Zieten's figure's of bis own species, differ 

 from specimens of amc'inua Goldf. from Lebanon and elsewbere. and from 

 Goldfuss's and Quenstedt's figures of the same, only in lacking the anterior 

 radial lines, which upon some examples of concinna arc very obscure. Cueul- 

 lcea concinna Phillips, 1829 (Geology of Yorkshire, Pari 1. p. 109, PL v, fig. 9), 

 from the Oxford Clay of Scarborough (figured as 33 mm. long, and I 5 mm. 

 high i, bears strong likeness to the smaller concinna Goldf. in form and mark- 

 ings. Munsterii Goldf., as figured in Petrefacta Germanise, is distinct from 

 Munsterii Zieten. 



