102 POMPECKJ. JURASSIC FAUNA OF CAPE FLORA. [norw. pol. exp. 



Panderianus, we find, besides much that corresponds, some important differ- 

 ences. The section of the rostrum agrees with Belemnites Panderi d'Orb. 

 in liie post-alveolar part, the shortness of the ventral groove, the some- 

 what drawn-out apex, and the great eccentricity of the apical line in some 

 of the pieces (fig. 19). The inconsiderable width of the ventral groove, and 

 still more the transverse section in the alveolar region of the rostrum are 

 points against the alliance with Belemnites Panderi. In Belemnites Panderi 

 this transverse section always remains distinctly laterally conipi'essed, while 

 in our piece, it is almost an exact circle. 



The characteristics which separate our species from Belemnites Panderi 

 d'Orb. consequently bring it nearer to Belemnites subextensus Nik. 



In common with this species — not very thoroughly described by Nikitin 

 — our own has the circular section in the alveolar region, the slender 

 form and the narrow ventral groove (Nikitin, 1. c. PI. VI. fig. 28 a). 



According to the single specimen which Nikitin has figured of Belemni- 

 tes subextensus, the transverse section of the guard in the post-alveolar part 

 is more rounded in this species than in most of the pieces of the form in 

 question. Moreover, the apex of the guard in this species is not at all drawn 

 out, and besides, the ventral groove Nikitin's fig. 28 b shows numerous longitu- 

 dinal furrows near the apex, which do not occur in our species, or possibly 

 are only not preserved. 



It is sufficiently clear from the reasons stated above, that our Belemnite 

 species from Cape Flora cannot be identified — as has been done by New- 

 ton — with Belemnites Panderi d'Orb. From a morphological point of 

 view our form rather stands between Belemnites Panderi d'Orb. and B. 

 subextensus Nik. as far as we can judge about the latter species. Suffic- 

 iently rich and well preserved material of both our species and B. subextensus 

 Nik. might possibly prove the necessity of an identification of the two species. 



Belemnites sp. indet. 1. 

 In phosphoritic clay boulders (found on July 14th, 1896, Windy Gully 

 ca. 400 ft.), some fragments of phragmacones of a Belemnite species which 

 must have attained considerable dimensions are embedded. One of these frag- 

 ments corresponds to a phragmocone diameter of about 65 mm. : the siphuncle 



