PRODUCTUS. 149 



In England, P. cora has been found in the carboniferous limestone of Kendal, 

 Lowick, Settle, Pool wash (Isle of Man). In Scotland, in the Mill Burn and Balgrochan 

 beds, as well as Campsic Main limestone, Stirlingshire ; at Arden Quarry, near Thornliebank. 

 in Renfrewshire ; West Broadstone, near Beith, Ayrshire. In Ireland, at Larganmore, 

 Millecent, Milverton, Skerries, Little Island, &c. In Belgium, at Vise, Tournay, &c. 

 In Russia, at Cosatchi-Datchi, near Sterlitamak, &c. In America, it was found by 

 D'Orbigny in a blue compact limestone above Patapatani, in one of the islands of the lake 

 Titicaca, and in a gray limestone at Yarbichambi. It has been also obtained from the 

 Mountain Limestone of Chester, Illinois, and by Dr. Fleming and Mr. Purdon in the 

 Pnnjaub (Tndia), &c. &c. 



Pkoductus semireticulatus. PI. XL1II, figs. 1 — 11, and PI. XL1V, figs. 1 — 4. 



Anomites SEMIRETICULATUS, Martin. Petrif. Derb., pi. xxxii, figs. 1, 2, and pi. xxxiii. 



fig. 4, 1S09. 



— froductus, Martin. lb., pi. xxii, figs. 1 — 3. 

 Scoticus, Sow. Min. Con., pi. lxix, fig. 3, Oct., 1814. 



— Martini, Sow. lb., pi. 317, figs. 2—4, Dec, 1821. 



— antiquatus, Sow. lb., figs. 1, 5, and 6. 



— concinnus, Sow. lb., pi. 318, fig. 1, 1821. 



— Martini and antiquatus, Phil. Geol. York., pi. vii, fig. 2, 1830. 



— pugilis, Phil. lb., pi. viii, fig. 6. 



Lepto:na antiquata, Fischer. Oryct. du Gouv. de Moscou, pi. xxvi, figs. 4, 5, 1837. 



— tubulifera, Fischer. lb., pi. xxvi, fig. 1 (not Deshayes). 



I'roductus Martini, De Kon. Desc. des Animaux Foss. du Terrain Carb. de la Belg.. 

 pi. vii, fig. 2, 1843. 



— Inca, D'Orb. Pak'ont. du Voyage dans l'Ameriqne Mcr., pi. iv, figs. 1— .'i, 



1844 (accordiug to M. de Koninck). 



— Peruvianus, IfOrh. lb., fig. 4. 



— flexistria, M'Coy. Synopsis of the Carb. Limest. Fossils of Ireland. 



pi. xvii, fig. 1, 1844 ? 



— semtreticulatus, De Kon. Mon. du genre Produetus, pi. viii, fig. 1 ; 



pi. ix, fig. 1 ; pi. x, fig. 1, 1847. 



— and Martini, M'Coy. Brit. Pakeozoic Fossils, pp. 467 



and 471, 1855. 



— Dav. Mon. of the Scottish Carb. Brack , pi. iv, figs. 



1—5, 7, and 12, 1860. 



— Salter. Quarterly Journal of the Geol. Soc, pi. vi. 



fig. 1, 1861. 



Spec. Char. Very variable in shape, transversely oval, sub-cylindrical or elongated : 

 hinge-line as long or somewhat shorter than the width of the shell ; ventral valve gibbous 

 and variably vaulted, with a shallow longitudinal median sinus or depression ; auriculate 

 expansions moderately developed ; beak Avide, incurved, usually covered with irregular, con- 



