ANIMALS. 121 



The Spirifer nucleolus of Kutorga,^ found in the Mountain Limestone of Sterhtamak, 

 has a close resemblance to this species. 



Camarophoria globulina occurs in the shell Limestone of Humbleton Quarry, 

 Tunstall Hill, Dalton-le-Dale, and Ryhope Field-House Farm ; but not so plentifully as 

 the last species : it is also found in the Breccia of Tynemouth. 



Camarophoria multiplicata, King. Plate VII, figs. 26 to 32 ; Plate VIII, 

 figs. 1 to 7. 



Terebratulita lacunosa, Schl. Von Buch, Ueber Terebrateln, p. 39, 1834. 



— — „ Le Cocq., Transl. of Von Buch, Mem. Geol. Soc. de 



France, p. 152, pi. xiii, fig. 17, 1838. 



— — Zeiten. Morris, Catalogue, p. 134, 1843. 



— — Schl. Geinitz, Gaea von Sachsen, p. 96, 1843. 

 Camarophoria multiplicata. King. Annals and Mag. of Nat. Hist., vol. xviii, p. 28, 



1846. 



— — „ Catalogue, p. 7, 1848. 



Terebratdla Humbletonensis, Eowse. Trans. T. N. F. C, vol. i, pp. 252-3, 1848. 



Diagnosis. — " Subtriangular, somewhat pointed behind, rounded in front, and a 

 little wider than long. Dorsal valve with a round incurved beak, slightly inclined 

 lateral surfaces, and a broad deep flattened mesial furrow. Ventral valve with strongly 

 inclined lateral surfaces, and a wide prominent flattened mesial ridge. Both valves 

 with numerous small obtuse folds, from five to eight in the furrow, and seven or more 

 on the lateral surfaces."^ 



Camarophoria multiplicata is a larger species than C. Schlotheimi, attaining sometimes 

 thrice the size of the latter : it is in general more finely and numerously ribbed : in 

 other respects both species have a striking resemblance to each other ; so that many 

 might easily fall into the error of considering one to be an adult form of the other. 

 Comparing, however, full grown specimens of C. /Schlotlieimi with those of corresponding 

 size (young) of C. multiplicata, the difference between them will be readily recognised ; 

 inasmuch as the latter has a decidedly more compressed form, and its median 

 sinus is only shghtly produced (vide PI. VII, fig. 32). Although stated in the 

 diagnosis to be subtriangular, as represented in PI. VII, fig. 28, many specimens are 

 found with a subpentagonal outline (vide PI. VII, fig. 26), and therefore so far 

 simulating C. Schlotheimi. Some specimens have the anterior prolongation of the 

 perforate valve falling so rapidly below the sides, or, in other words, projecting so 

 little in advance of them as to make the shell appear much wider than long. (Compare 

 specimens represented in PI, VIII, figs, I, 2,) 



^ Verhandlungen der Kaiserlich-Russiscben Mineralogischen Gesellschaft zu St. Petersburg. (Jahr 

 1842, Feb. 5, fig. 7.) 



2 King, Catalogue, p. 7. 



