BRACHIOPODA. 
317 
Mr. Davidson, in his Devonian Brachiopoda,* has referred the Devonian 
species, Orthis productoides, Murchison, to Strophalosia, but 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 Productus subaculeatus, Murchison, an unattached species, subse¬ 
quently taken as the type of Productella. 
Genus DAYIESIELLA, Waagen. 1884. 
1823. Productus, Sowekby, Mineral Conchology, vol. iv, pp. 31, 329. 
1837. Leptcena, Fischer. Oryctogr. du Gouvern. de Moscou, p. 143, pi. xxii, fig-. 1. 
1842. Producta, d’Archiac and de Verneuil. Trans. Geol. Soc. London, 2nd Ser., vol. vi, pt. ii, p. 397. 
1846. Chonetes, de Keyserling. Beob. Reise in das Petschora-land, p. 214, pi. vi, fig-. 1. 
1847. Chonetes, de Koninck. Monogr. du Genre Chonetes, p. 189, pi. xix, fig. 1. 
1861. Chonetes, Davidson. British Carboniferous Brachiopoda, p. 180, pi. xlv, figs. 1-7. 
1862. Productus, Davidson. Brit. Carb. Brachiopoda, pp. 275, 277, pi. xlvi, fig. 1; pi. lv, figs. 6-10. 
1884. Daviesiella, Waagen. Mem. Geol. Surv. India ; Palseontologia Indica, Ser. xiii, vol.i. No.4, p. 613. 
Dr. W aagen writes: 
“ I create this genus for the reception of such forms as Productus 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. cit. 
PIG. 27. Productus ( Daviesiella) Llangollensis, Davidson. 
After Davidson. 
Page 97. 
f Permian Fossils, p. 95. 
