Jurassic Fauna from Central Arabia. 395 
hardt’s Deutsch-Ost-Afrika, 1900, vol. vii. pp. 532, 533, pl. xviii 
figs. 11, 12. 
Exogyra bruntrutana, Futterer, Zeitsch. Deutsch. Geol. Ges, 1897, 
vol, xlix. pp. 582, 583, pl. xix. fig. 1; Dacqué, Beitr. Pal. Geol, 
Ost-ungarns Orients, 1905, vol. xvii. pp. 185, 136, pl. xv. (2) fig. 18. 
Several examples of this small (15x11 mm.) species 
occur in a limestone matrix, while others are attached to a 
shallow, rounded, ostreiform lower valve from the same beds 
which has the appearance of being closely related to O. mont- 
beliardensis of Contejean from the Kimeridgian of France. 
Distribution. Oxfordian to Portlandian : Kurope and Africa 
(Shoa, Somaliland, and near Kiswere, EK. Africa). 
Locality. Bachain. 
Chlamys articulatus (Schilotheim). 
(Pl. XI. fig. 7.) 
Pectinites articulatus, Schlotheim, Die Petrefactenkunde, 1820, p. 227. 
Pecten articulatus, Goldfuss, Petref. Germaniw, 1833, vol. ii. p. 47, 
pl. xc. fig. 10. 
This determination includes the remains of a single valve 
embedded in matrix, showing no hinge-expansions, the 
margins likewise, except at the base, being also absent. The 
few costs preserved bear a resemblance to those seen in 
Schlotheim’s P. articulatus, as first figured by Goldtuss from 
the “ Korallenkalk” of Nattheim, Germany, although the 
actual type came from the Jurassic Limestone of Aarau in 
Switzerland. The coste are acutely lamellated at more or 
less equal distances, and so producing an infundibuliform 
character, besides which the furrows are observed to be 
covered with a series of closely-set, oblique, transverse stria- 
tions. This species is related to P. vimineus of J. de C. 
Sowerby, which ranges from Bajocian to Oxfordian times, 
and which appears to have fewer coste, a more elongate 
contour, while the furrow-striations are more horizoutal than 
oblique. Schlotheim’s type from Aarau is now regarded as 
belonging to the Uppermost Sequanian (= Astartian stage), 
whereas Goldfuss’s example Trom Nattheim is referred to 
the Kimeridgian deposits. An English specimen has been 
recognized from the Cornbrash. 
Distribution. Bathonian to Kimeridgian: Britain and 
Europe. 
Locality. Ashaira. 
