1867.] TATE — SOriH-AFEICAX FOSSILS. 151 



June 16tli, 1859), ^' Iliave found the Hamites in tlie same formation 

 with the Trigonias, not in distinct beds overlying them." 



BELEiDm^is AFEICA^T3, spec. noT. PI. YII. figs. 2 a, 2 h. 



This Belemnite belongs to the section Canaliculati, species of 

 which, though ranging from the Inferior Oolite to the Kimmeridge 

 Clay, are eminently characteristic of the Lower Oolites. This species 

 differs but slightly from B.AucManclicus, concerning which Yon Hauer 

 writes that ^' it resembles so much the well known and widely 

 spread^, aincdicidatus that it is almost impossible to give a sufficient 

 diagnosis of it." 



If B. svJcatus be distinct from B. canalkulatus, then the former is 

 decidedly the analogue of the South-African and Xew-Zealand 

 species ; for in both B. Africanus and B. Aucklandkus the ventral 

 groove does not extend to the point, a character that allies them to 

 B. sulcatum and separates them from B. canalicidatus. They both, 

 however, differ from B. sidcatus m being slightly compressed from 

 back to front, presenting sectionally a sub quadrate outline, as in. 

 B. canalicidatus, and not from side to side as in B. sidcatus. But, 

 on the other hand, the external aspect of the two antipodean species 

 is that of the last-mentioned species. 



A second extra-European species allied to B. Afncamis is B. 

 Grantianus, D'Orb. *, of the Oolites of Cutch, which Sowerby f re- 

 ferred to B. canalicuJatus, Schloth.^ but which was regarded as dis- 

 tinct by the former author, who apphed to it the specific name here 

 adopted. This species has the form and the wide ventral groove of 

 B, Africanus, but agrees with B. canalicidatus in having the furrow 

 continuous to the point. 



It does not appear, perhaps, allowable to admit of three species 

 intermediate between the closely allied B. camdicidatus and B. sul- 

 catus ; yet I feel justified, from a careful comparison of specimens of 

 all the species, in the course here pursued. 



The relationships of these stand thus : — B. Grantianus is a sub- 

 species of, or is closely allied to, B. sidcatus. (The sulcation is 

 broader and deeper than in the European B. sidcatus.) 



B. Africanus and B. AucJclandicus, the representative species of 

 B. sidcatus, are allied, and pass, through B. Grantianus, to B. canali- 

 culatus. These species might, if allowable, be expressed thus : — 

 B. antijpodinn, «. AucMandicus. 

 „ „ /3. Africanus. 



Belemnites Africanus is the only species that links the Jurassic 

 fauna of South Africa to that of the Secondary rocks of Xew Zea- 

 land, which Yon Hauer regards as either of Jurassic or of Lower 

 Cretaceous age. They contain an Aucella, two Inoceranii, and B. 

 AucMandicus, the only species comparable with a European form, 

 the affinities of which have been pointed out ; the genus Aucella is 

 confined to the St. Cassian beds and the Oolites ; and as a Triassic 



'^ Prodrome, vol. i. p. 327. t Trans, aeol. Soc 2nd ser. vol. v. p. 329. 



