PRODUCTUS. 157 



the same shell, but of which many examples have been found in the same quarries along 

 with every intermediate passage form. Possessing examples of Norwood and Pratten's 

 P. Wabashcnsis and P. splendens, I could not recognise the smallest difference between 

 them and the generality of our Scotch examples of Sowerby's shell, and I have but little 

 doubt that the list of synonyms might be further increased had we the means of com- 

 paring certain so-termed species with our British forms. I consider that Prof. M'Coy is, 

 however, mistaken while locating P. piu/ihs, Phillips, and his own P. coslellafus among the 

 synonyms of the shell under description. In England P. longispinus is common in the 

 Carboniferous limestone and shales of several Derbyshire and Yorkshire localities, and at 

 Lowick, Northumberland, Poolvvash, Isle of Man, &c. 



In Scotland it is exceedingly abundant in various counties, and occurs in several stages. 

 At Braidwood, in Lanarkshire, it occurs at 337 fathoms lower than the "Ell Coal," and 

 a little lower again at Hallcraig, Raes Gill, Langshaw, Hillhead, Kilcadzow, &c, in the 

 Parish of Carluke ; also in the same county at Kersgill and Brockley, near Lesmahago, 

 Auchentibber, and Calderside, High Blantyre, Capel Rig, East Kilbride, 1 &c. It occurs 

 also in Renfrewshire, Dumbartonshire, Ayrshire, Stirlingshire, Edinburghshire, Had- 

 dingtonshire, Eifeshire, &c. 



In Ireland it occurs in the Calciferous slate and Carboniferous limestone of many 

 localities, such as Lisnapaste, Howth, Ballyduff, Mohill, Hook, Bundoran, Millicent, 

 Culkagh, &c. 



In Belgium, at Vise, Tournay, &c, and, indeed, is found in almost any Carboniferous 

 district where Brachiopoda have been found. In Russia, at Karova, Government of Kalouga, 

 &c. Yarbichambi, on the edge of the Lake Titicaca, on the Bolevian table-land of the 

 Andes, and Sangamon, County Illinois, in America, &c. In the Carboniferous limestone 

 of the Punjaub in India. Carrocreek in Tasmania, &c. 



Productus sinuatus, Be Koninek. PI. XXXIII, figs. 8 — 11. 



Leptcexa sinua.ta, Be Koninek. Description des Animaux fossiles du Terrain Carb. de 

 la Belgique. Supplement, p. 654, pi. lvi, fig. 2, 1851. 

 — — M'Coy. British Palaeozoic Fossils, p. 453, 1855. 



Productus sinuatus, Bav. The Geologist, vol. iv, p. 48, Feb., 1861. 



Spec. Char. Shell transverse, longer than wide ; obscurely subtetragonal ; hinge-line 



about as long as the greatest width of the shell ; cardinal angles rounded. Ventral 



valve geniculated from the anterior half, being bent at right angles to the posterior or 



visceral portion ; ears large, reflexed, curving away from the hinge-line ; visceral disc 



to/* somewhat flattened, but divided by a longitudinal sinus commencing at a short distance 



1 In his 'History of Rutherglen and East Kilbride,' published in 1/93, David Ure gives two figures of 

 the shell under description. 



