332 
SUPPLEMENT. 
the shell. In the specimens figured by the brothers Sandberger, 
the distance of the septa from each other varies from ^ to i the 
corresponding diameter. The septa are, moreover, exceedingly 
variable in their distance apart even in the same individual, three 
or four of them being sometimes crowded together, and occupying 
only one half the space that the others do. 
horizon. Orthoceratiten-Schiefer ; Lower Devonian : Stringo- 
cephalen-Kalk ; Middle Devonian. 
Localities. Wissenbach, Nassau (L. Dev.); Gerolstein, Eifel (M. 
Dev.). 
Represented in the Collection by two very imperfect fragments. 
Jovellania Jovellani, de Yerneuil, sp. 
1845. Orthocei'atites Jovellani, de Verueuil, Bull. Soc. Geol. de France, 
s^r. 2, vol. ii. p. 461, pi. xiii. ff. la, \b, 2. 
1849. Orthoceratites Jovellani, d’Orbigny, Prodr. de Paleont. Stratigr. 
vol. i. p. 64. 
1852. Orthoeeras Jovellani, Giebel, Fauna der Vorwelt, Baud iii. 
Abth. i. p. 246. 
1855. Orthoeeras Jovellani, Barrande, Bull. Soc. G<§ol. de France, s»5r. 2, 
vol. xii. pp. 476, 488, pi. xii. If. 16, 17. 
1875. Orthoceratites Jovellani, Mallada, “ Synop. Fosiles de E?<pana,” 
in Bol. Com. del Mapa geologico de Espaha, tom. ii. p. 40. 
1876. Orthoceratites Jovellani, Mallada, ibid. tom. iii. pi. ii. ff. 1,2^ 
(copied from de Verueuil). 
1876. Orthoeeras Jovellani, de Tromelin and Lebesconte, ‘‘Terr. Prim, 
de Bretagne,” in Bull. Soc. Geol. de France, ser. 3, vol. iv. p. 614. 
1876. Orthoeeras Rupphachi, Maurer, Neues Jahrb. fiir Min. &c. 
p. 831, Taf. xiv. ff. 2, a, b {teste Kayser). 
1877. Orthoeeras Jovellayii, Barrande, Syst. Sil. de la Boheme, vol. ii. 
Texte V. p. 1273, pi. ccliv. 2 ff. 1-3. 
1877. Orthoeeras Jovellani, Barrande, ibid. Suppl. et S^rie tardive, 
p. 69. 
1878. Orthoeeras Jovellani ?, Kayser, A bhandl. zur geol. Specialkarte 
von Preussen, Band ii. Heft iv. p. 68, Taf. ix. ff. 5,. 5a. 
1884. Orthoeeras ? Jovellani, Kayser, Jahrb. der Konigl. Preuss. geol. 
Landesanst. imd Bergakad. f. d. Jahr 1883, p. 42. 
Np. Char. Shell very large, subconoidal in the young, and becom- 
ing sub triangular in the adult, the angles rounded in casts without 
the test ; such rounding being probably due partly to weathering. 
^ These plates should have accompanied the descriptions of the fossils in 
vol. ii., with which their numbers correspond. 
2 The volume of Plates, of which this one forms a part, was published in 
1868. 
