﻿CAMAROPHORIA. 



Camarophoria Crumena, Martin (sp). PI. XXV, figs. 3 — 9. 



Conchyliolithus anomites crumena, Martin. Petrificata Derbiensia, pi. xxxvi, fig. 4, 



1809. 



Tbrebuatula Schlotheimi, Von Buck. Ueber Terebratula, p. 39, pi. ii, fig. 32, 1834. 



Camarophoria Sciilotiikimi, King. A Monograph of the Permian Fossils of England. 



p. 118, pi. vii, figs. 10—21, 1850. Dav. Mon. of 

 British Permian Brachiopoda, part iv, p. 25, pi. ii, figs, 

 16—27, 1857, &c. 



Spec. Char. Shell obscurely rhomboidal or deltoid, with marginal expansions ; gene- 

 rally wider than long ; greatest breadth towards the anterior portion of the shell. Beak 

 of ventral valve small, moderately prominent, and incurved ; foramen minute; sinus vary- 

 ing in depth and width according to age and specimen, flattened along the middle. 

 Dorsal valve more convex than the opposite one, arched in profile ; marginal expansions 

 slightly bent upwards ; the mesial fold commences at a short distance from the umbone, 

 and varies in width and elevation according to the number of ribs which cover its surface ; 

 the lateral portions of the valve slope rapidly downwards. The ribs which ornament the 

 valves generally commence at about the middle of the shell, and extend to the margin ; in 

 number they vary from thirteen to twenty-four in each valve, of which from three to six 

 occupy the fold, while two to five ornament the sinus. The ribs on the lateral portions of 

 the shell are sometimes strongly marked, while at other times they are but indistinctly 

 defined. A large specimen measured, without its marginal expansions — length nine, 

 breadth eleven and a half, depth six lines ; but the dimensions were generally smaller. 



Obs. Several palaeontologists have alluded to the presence of Camarophoria Schlothcimi 

 in the rocks of the Carboniferous period ; thus M. de Verneuil and Count Keyserling 

 state, in their great work on Russia (1S45), that the Permian species was found by them 

 in the Carboniferous limestone of Mount Cheractau, near Sterlitamack ; at Sarana, 

 on the Ufa; and at Cosatchi Datchi, to the east of Miask (Oural). In the second 

 edition of Morris's ' Catalogue,' C. Schlotheimi is also recorded from the Car- 

 boniferous limestone of Derbyshire. At p. 119 of his 'Monograph of English 

 Permian Fossils,' Professor King states that " Camarophoria Schlotheimi closely 

 resembles the Cam. crumena of Martin, which appears only to differ from the former in 

 being narrower and more accumulated behind ; occasionally, however, a variety of the 

 present species occurs, which can scarcely be distinguished from C. crumena; in short, both 

 species apparently merge into each other so completely, that many would be inclined to 

 consider them as specifically inseparable." In a note at the bottom of the page the same 

 author has added, that having examined (what I believe he erroneously takes to be) Martin's 

 original specimen of Crumena, in Mr. J. de C. Sowerby's Collection, he found that it 

 ^belonged to the genus Camarophoria j and moreover that a tablet in the Gilbertsonian 



15 



