58 SYRIAN MOLLUSCAN FOSSILS. 



Cucullaea (Trigonoarca) Ligeriensis D'Orbigny sp. 



Area Ligeriemis D'Orbigny, 1844, Paleont. FraiiQ., Terr. Cret.,, Ill, p. 227, PI. cccxvii. 



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

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

 Craie cMorUee (Upper Greensand) of Eouen. 



Length, 64 mm.; height, 37 ram.; thickness, 41 mm. 



In form this species is very similar to, if not identical with. A. Pa-'^.v/caia 

 d'Orb., 1844 (Paleont. Fram;., Terr. Cret., Ill, p. 241, PI. cccxxvii, figs. 1, 2), 

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

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

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

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

 and Liyeriensis approach nearest to A. inchn-rda 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. 



Cucullsea (Trigonoarca) concinna Goldfuss sp. 



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



? Cucullma Munsferii Zieten, 1830, Versteiiierungeii Wurtembergs, p. 75, PI. Ivi, figs. 7 a-c. 

 Area concinna Goldfuss, 1838, Petrefacta Germanise, II, p. 148, PI. cxxiii, figs. 6 a, h. 

 Cucullcea concinna Quenstedt, 1852, Handbucli dcr Petrefactenkunde, p. 52(), PI. xliii, fig. 27. 



Thirteen specimens, varying much in size, of which the 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 Mnrnes ox- 

 fordiennes of Salins, 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 {Cucidlwa) Miimterii Zieten," from the 

 Lias mot/en of Balingen, as well as Zieten 's figures of his own species, differ 

 from specimens of cniiciiina Goldf. from Lebanon and elsewhere, and from 

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

 radial lines, whicli upon some examples of concinna are very obscure. Cucul- 

 Iwa concinna Phillips, 1829 (Geology of Yorkshire, Part I, p. 109, PI. v, fig. 9), 

 from the Oxford Clay of Scarborough (figured as 33 mm. long, and 15 mm. 

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

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

 Miinsterii Zieten. 



