part 3] jueassic eocks oe new Zealand. 259' 



and JB. hochstetteri Hector, but the exact locality of neither of 

 these is recorded. Rather than waste time in discussing the- 

 nbmenclature of these specimens, I propose to describe the best- 

 preserved examples that I collected and indicate the relations 

 which they seem to bear to those of other localities, especially 

 the forms recorded by Bcehm from the Sula Islands. Bcehrn 

 cpiotes G-urich's remark that 



' The belemnites from Rotti resemble outwardly the Middle Jurassic Bel. 

 canaliculatus ; a closer examination, however, reveals that they belong- to- 

 the group of Bel. absolutus. The most nearly related, perhaps even identical, 

 form is Bel. gerardi Oppel from the Spiti Shales of the Himalaya.' (Op. tit. 

 pp. 54-55.) 



Farther on, he says that in the cross-section of B. gerardi the 

 ventral sulcus of the rostrum does not cut into the concentric 

 calcareous rings, but rather that each single ring agreeing with the 

 sulcus is embayed to an equal extent. This feature is observable 

 in the cross-section, wherever I have seen it, in the examples, 

 from the Jurassic of New Zealand. 



Careful zonal collecting in New Zealand is very advisable, since, 

 from the few specimens that I obtained at Kawhia, it appears 

 that those from the Mission Station at Te Ahu Ahu are distinct 

 from those in the higher beds at Te Puti, while both these are 

 distinct from the form that occurs at Totara Point in beds which, 

 may be approximately of Bathonian age. 



Belemnites (Belemnopsis) sp. (PL XVI, fig. 14.) 



Description. — The following description is from a specimen' 

 nearly all the guard of which is present, but none of the alveolar 

 region. The specimen is slightly distorted. Near the posterior 

 end the cross-section is almost circular, but about the middle it 

 becomes rather wider than high. The ventral sulcus extends for 

 the whole length of the guard to the point, and is rather deep and 

 narrow with a rounded floor and rounded slopes. The guard; 

 increases gradually in section from the anterior part until about 

 two-thirds of the distance to the apex where the section is greatest,, 

 whence it tapers gradually to the apex. 



Dimensions. — Length =68 mm. ; at the thickest part the 

 section is 6 5 mm. wide, and 5'5mm. in a ventro-dorsal direction.. 



Locality. — Totara Point, Kawhia. 



Remarks. — Mr. Buckman reports on this specimen — 



' Belemnopsis sp. cf. B. fleuriausus A. d'Orbigny of the Great Oolite and 

 B. parallelus Phillips of the Fuller's Earth (~ Great Oolite pan's). The apex 

 is less elongate than in the first species. Bathonian.' 



Numerous belemnites occur in the glauconitic nodular green-- 

 sands at Totara Point. Most of them are curiously bent and 

 distorted, this being apparent^ the result of movement in the 

 rock at some period subsequent to deposition. All the specimens 

 and fragments collected seem referable to one species, although, 

 further search may yield others. 



