494 J- P. J- Ravn. 



73. Belemnites Panderianus d'Orbigny. 



PL XXXVII, fig. 2. 



1842. Belemnites excentricus Blainv. ; d'Orbigny (pars), Paleont. Prang. Terr. jur. I. 



p. 120; PL 17, figs. 3 and 7—8. 

 1845. Panderianus d'Orbigny in Murchison, Verneuil et Keyserling, 



Geologie de la Russie d'Europe. II. 

 p. 423; PL 30. figs. 1- 5 and 7—11. 

 1881. d'Orb. ; Nikitin, Jura von Elatma. p. 48. 



1802. Panderi d'Orr. ; Pavi.ow et Lamplugh, Argiles de Speeton etc. p. 246. 



Some well-preserved fragments of 3 different rostra belong with 

 certainty to this species. — On the underside of the apex there is a 

 well-marked furrow, which however soon becomes feebler and dis- 

 appears 1*5 — 2 cm before the point of the rostrum, merging here 

 gradually into the flattened underside of the rostrum; in the alveolar 

 region the flattening disappears. Further, the hindmost part of the 

 rostrum is greatly compressed, so that the section here is rounded- 

 rectangular; in the alveolar region the section is more rounded- 

 trapezoidal. The apical line lies very excentrically, especially in the 

 posterior part of the rostrum. 



The largest fragment (posterior part of rostrum) is 55 mm long 

 and shows at its front end no trace as yet of the alveolus; the 

 dorsoventral diameter is here 15'5 mm, the transversal 15 mm; at a 

 distance of 29 mm from the point of the rostrum the same dimen- 

 sions are respectively 13 - 5 and 13 mm. In a second specimen the 

 measurements at a distance of 38 mm from the point of the rostrum 

 are respectively 16 and 14 - 5 mm. 



A loose-lying cast of an alveolus is present from the same locality 

 as the above fragments of rostra; its dorsoventral angle is ca. 24°, the 

 transversal ca. 22°. This perhaps also belongs to B. Panderianus. 



Distribution. North -East Greenland: "Kteft I" on Store 

 Koldewey Island (3 — 4 spec). 



Russia: from the zone with Quenstedtoceras Lamberti to the zone 

 with Cardioceras alternans. 



74. Belemnites breviaxis A. Pavlow. 



1842. Belemnites excentricus Blainv.; d'Orbigny (pars), Paleont. Franc. Terr. jur. I. 



p. 120: PL 17, figs. 1-2. 

 1849. — — ; Quenstedt, Die Cephalopoden. p. 42(i; PL 27, 



fig. 5. 

 1865. abbreviatus Phillips, British Belemnitidae. V. p. 124; PL 34, figs. 84—85. 



1892. breoiaxis Pavlow et Lamplugh, Argiles de Speeton etc. p. 247; 



PI. 8, fig. 7. 



A fairly complete rostrum seems to belong to this species, as it 

 agrees quite well with Pavlow's description. The extreme point with 

 a part of the alveolar region is wanting. 



