396 Mr, A. H. Foord on " Ortlioceras 



been greatlj enriched within the last few years through the 

 munificence of the late Mr. J. E. Lee, of Torquay, and it is 

 principally upon this new material that the following descrip- 

 tions are based. I have named the first species after the 

 illustrious Swedish naturalist Wahlenbei-g, 



JEndoceras WaMenhergi, sp. nov. 



1732. Species vi. Orthocei-atites siphone ad peri/pheriam posito erasdori^ 



&c., Breynius, Dissertatio pliysica de Polythalamiis, p. 34, tab. iv. 



figs. 4-6. 

 1759. Orthocerati recti. . . . in Dahlia reperti. De rariori quadam 



Orthoceratitis Specie, in Suecica reperta, tractatus, &c., Nicholas d& 



Himsel, Phil. Trans, vol. 1. pt. 2, p. 692, tab. xxiii. tig. A. 

 ? 1776. Orthoceratites, Walch and Knorr, Monumens des Catastrophes 



de la Terre, torn. iii. suppl. p. 140, tab. iv e. fig. 1. 

 18S7. Orthocei-atites duplex, Hisinger, Lethsea Svecica, p. 28; tab. ix. 



fig. 1. 

 P 1855. Ortlioceras duplex, Barrande, in Leonhard and Bronn's Neues 



Jahrb. p. 264, Taf. iii. figs. 11, 11*. 

 1857. Orthoceras cmnmune, Boll, Archiv fiir die Naturkunde von Mek- 



lenburg, p. 12, Taf. ii. figs. 4, a, b (not of Hisinger). 

 ? 1861. Orthoceras duplex, Rcemer, Fossile Fauna von Sadewitz, p. 60, 



pi. vii. figs. 2, «, b, 

 1866. Endoceras {Orthoc.) duplex, Barrande, Syst. Sil. de la Boheme, 



vol. ii. Texte iii. 1874, pp. 709, 713, pi. ccxxxiii. fig. 9, pi. ccccxxviii. 



figs. 9-12. 

 ? 1869. Orthoceras duplex {giganteuni), Karaten, Die Verstein. des 



Uebergangsgebirges in den Gerollen der Herzogthiimer Schleswig 



und Holstein, p. 49, tab. xvii. fig. 6, a, h. 

 ? 1875, Orthoceras duplex, Mallada, Bol. Com. Mapa Geol. Espaiia, 



tomo ii. p. 24. 

 1876. Orthoceras duplex, Roemer, Lethsea Geognostica, Theil i. Leth. 



Palseoz. Atlas, Taf. vi. fig. 2, a, b. 



1880. Orthoceras duplex, Angelin-Lindstrom, Fragm. Silurica, p. 1, 

 tab. iii. figs. 9-11. 



1881. Endoceras duplex, Schroder, Schriften der physikalisch-okono- 

 mischen Gesellsch. zu Konigsberg, Jahrg. xxii. Abth. i, p. 82, Taf. iii. 

 figs. 1, A, B. 



1882. Endoceras cf. duplex, Barrois, Terr, anciens des Asturies et de la 

 Galice, p. 187, pi. iv, figs. 7, a, b, c. 



1886. Orthoceras {Endoceras) duplex^ Roemer, Lethsea erratica, in 

 Dames and Kayser's Palaontologische Abhandl. Band ii. Heft 6, 

 p. 38, Taf, ii. figs. 2, a, b. 



Sp. char. Shell straight, very long. Tapering rather 

 slowly at the rate of about 1 in 12, taking the average 

 measurement of three adult specimens. Section circular. 

 Body-chamber unknown. Septa moderately distant, that is, 

 about 8 lines apart at a diameter of 2^ inches, decreasing to 

 a distance of 3 lines at a diameter of 8 lines. The distance 

 of the septa varies considerably in different specimens, and 

 even in different parts of the same individual. Thus in one 



