BRACHIOPODA. 



317 



Mr. Davidson, in his Devonian Brachiopoda* has referred the Devonian 

 species, Orthis produdoides, Murchison, to Strophalosia, hut it shows no evidence 

 of attachment, and more properly belongs to Productella. Professor King 

 had previously made a similar reference of this species,f and included in the 

 same genus Produdus subaculeatus, Murchison, an unattached species, subse- 

 quently taken as the type of Productella. 



Genus DAVIESIELLA, Waagen. 1884. 



1823. Produdus, Sowerby, Mineral .Conchology, vol. iv, pp. 31, 329. 



1837. Lept(BtM, Fischer. Oryctogr. du Gouvern. de Moscou, p. 143, pi. xxii, fig. 1. 



1842. Pi-oducta, d'Archiao and de Verneuil. Trans. Geol. Soc. London, 2nd Ser., vol. vi, i)t. ii, p. :i07. 



1846. C/ionetes, de Keysbrling. Beob. Reise in da.s Petschora-Iand, p. 214, pi. vi, fijf. 1. 



1847. Chonetes, de Kokinck. Monogr. du Genro Chonetes, p. 189, pi. xix, fig-. 1. 



1861. Chonftts, Davidson. British Carboniferous Brachiopoda, p. 180, pi. xlv, figs. 1-7. 



1862. Produdus, Davidson. Brit. Garb. Brachiiipoda, pp. 275, 277, pi. xlvi, fig. 1 ; \i\. Iv. figs. 6-10. 

 1884. Daviesiella, Waagen. Mem. Geol. Snrv. India ; Palaeontologia Indica, Ser. xiii, vol.i, No. 4, p. 61 3. 



Dr. Waagen writes : 



" I create this genus for the reception of such forms as Produdus Llangollensis, 

 Dav., and Prod, comoides, Sow., which are characterized by cardinal teeth and a 

 second pair of adductor impressions in the ventral valve. The other characters 

 are like those of Productus. Mountain limestone." — op. at. 



Fig. 27. Productus [DaviesleUa] LkmgoUettsis, Davidson. 

 Alter Davidson. 



* Page 97. 



t Permian Fossils, p. 95. 



