105 



The length of the guard is four inches ; the greatest diameter 

 j s T °^ths, and the corresponding shortest diameter is T "oths of 

 an inch ; the axis of the guard is 2| inches. 



Explanation of Piourks. 

 2a. Lateral aspect, showing the lateral groove with its flexure 



and hifurcation. 

 21. Dorsal aspect, showing lateral furrows. 

 2c. Transverse section of alveolus, showing the unsymmetrical 



position of the dorso-lateral furrows, and the thin test 



on the ventral side ; s, the siphuncle. 



Affinities and Remarks. — This Belemnite is related to B. 

 australis, Phillips (Quart. Journ. G-eol. Soc., London, vol. xxvi., 

 p. 258, t. xvi., figs. 1 and 2), but differs from it in being more 

 distinctly hastate, much more compressed, and in the lateral 

 grooves being continued into a double sulcus. Phillips seems 

 to me to have included two, if not three, species under B. 

 australis ; and, judging from the remarks of the author and 

 the drawings, the form represented by figs. 3 and 4 cannot be 

 far removed, if separable, from B. Canhami. Dr. Hector has, 

 in my opinion, misinterpreted the characters of B. australis, 

 when he applies that designation to a species from the 

 cretaceous rocks of New Zealand. (Trans. New Zealand 

 Institute) . 



The number of specimens of B. Canhami examined by me is 

 sixteen ; these include examples ranging from If up to 4 inches 

 in length. All exhibit such unmistakable community of 

 characters, which cannot be said of the forms collected under 

 the name of B. australis, that I cannot doubt that a good 

 species, distinct from the typical B. australis (figs. 1 and 2, op. 

 cit.), is represented by them. 



Locality and Horizon. — Mesozoic beds near Peake, Central 

 Australia. Porwarded by Mr. J. Canham, Corr. Memb., to 

 whom the species is dedicated in recognition of his aid in 

 advancing our knowledge of the Natural History of this- 

 province. Mr. Chandler, of Peake, writes me "that the 

 specimens you have, were got from the Woodduck Creek, and 

 none have as yet been found in conjunction with fossiliferous 

 rock." The rock here referred to is one yielding Monotis 

 Barklyi, Cytherea Clarkei, &c. 



A second species of Belemnites (incorrectly referred by me to 

 B. australis, vide Trans. Phil. Soc, p. 1., 1879,) occurs in associa- 

 tion with the fore-mentioned lamellibranchs at Mount Mar- 

 garet, as proved by the collections made there by Mr. E. 

 Beetson. The few specimens to hand are too much weathered 

 for specific determination. 



