258 Messrs. Parker and Jones on 



ceps, nat. size and magn. 4 diam. Ovoid in shape. Figs. 

 5, a, h, Alveolina onontiparaj nat. size and magn. 4 diam. 

 Fusiform. [In the phite, fig. 5, outline or longitudinal 

 section, nat. size ; fig. 6, longitudinal section, opened by 

 weathering, magn.] There can be no doubt of these shells 

 being (fig. 5) Fusulina cylindrica^ Fischer, and (fig. 4) 

 its short sphajroidal variety. 



§11. Melonia-lionistone of the Mountain-limestone of 

 Witegra. 



PI. XXXVII. X. D. A piece, nat. size. D. figs. 1-4, Borelis 

 sioliceroidea^ (1842), nat. size, and views and section 

 magn. Very small, oblately spheroidal, deeply and evenly 

 furrowed longitudinally ; chambers small (or nearly filled), 

 decidedly Fusuline in character. Figs. 5, 6, B. constricta^ 

 nat. size and magn. Such a Fusidina as this has been 

 found fossil in the Arctic Regions*. Figs. 7-9, Alveolina 

 jyrisca (1842) ; nat. size and magn. This is a Fusidina 

 like C. 5. Figs. 10, 1 a-/, represent Borelis [Melonia) meloj 

 from the Karst, near Trieste, for comparison. This is a 

 true simple Alveolina, with a section very different from 

 that of any of the above. 



§12. Hornsfone of the Mountain-limestone, icith Spirifer 



mosquensis, /rom Tula, Russia. (Monatsb. 1843, pp. 79, 106.) 



PL XXXVII. XI. A-D. The material variously shown. 



Figs. 1, 2. Alveolina "priscal These are internal casts of Fu- 

 sidina cylindnca ; but the shape of the chambers is not 

 so definitely quadrangular as in figs. 5 & 8. This may be 

 due either to mineralization or to some obliquity in the 

 section. 



Fig. 3. Borelis labyrinthiforinis (1843). A vertical section of 

 the internal cast of a Fusulina, of an oblate-spheroidal 

 shape. 



Figs. 4, 5. B.palaiojdms. Casts of a Fusidina, with short alar 

 prolongations of the chambers, and therefore to some ex- 

 tent Nummuline in shape, being discoidal with keeled 

 edge. 



Fig. 6. B. jpalceophacus. A cast of a similar but thicker Fu- 

 sulina. 



Figs. 7, 8. B. palceosphmra. Casts of a somewhat similar 

 Fusulina, but barrel-shaped, having considerably produced 

 alse. In shape it corresponds with x. D. 1-4. 



* Fusulina hyperhovea, Salter, in Belclier's * Arctic Voyage,' 1855, vol. ii. 

 p. 380, pi. xxxvi. figs. 1-3. 



