540 Dr. F. A. Bather — The Mount Torlesse Annelid. 



and Eeeve, from the China seas, since that tapers rather rapidly and 

 has longitudinal ribs of about the same degree of coarseness. That 

 species, however, has an apical fissure, is much straighter, and 

 marked with transverse lines of growth. None of the Carboniferous 

 species are so coarsely marked as the present one. It seems necessary, 

 therefore, to establish : — 



Bextalium HuTTom, n.sp. 



A Dentaliam (or allied genus) of which the shell tapers rapidly 

 (from 25 to 7-5, length being taken as 100) and is strongly curved 

 (radius of outer curve being circa 12 mm.), with about fourteen 

 distinct longitudinal ribs. 



Here too the name of the collector and donor of the specimens 

 described, the lamented New Zealand geologist who himself alluded 

 to them in his published writings, seems highly appropriate for the 

 trivial appellation.^ 



Holotype: Specimen No. 22 of Mr. Ferrar's list (Fig. 5). 



Horizon : Said to be the same as that of Torlessia Mackayi. 



Localities: Kowai River (holotype), Wilberforce River (No. 23), 

 and west coast of the South Island {fide M'Kay), all in New 

 Zealand. Perhaps this is the same species as was found in the 

 Maitai Series of the Taipo ranges by S. H. Cox (1877, p. 78) and 

 referred by him to Dentaliiim ; but it is not, of course, the same as 

 any of the Dentalium from much later rocks recorded by M'Kay 

 (1877, pp. 101, 110, 116, 117). 



I am indebted to my colleagues Mr. Edgar Smith and Mr. G. C. 

 Crick for kindly looking at these obscui-e fossils, and for raising no 

 •objection to the systematic position here proposed for them. 



PAPERS SPECIALLY REFERRED TO. 



{By "Explor. Rep." is meant "Reports of Geological Explorations" published by 

 the Geological Survey of New Zealand.) 



Cox,S.H. 1877. "Report on Westland District": Explor. Rep., 1874-76,pp. 63-93. 

 Etheridge, R., fil. 1880. "A Contribution to the Study of the British Carboni- 

 ferous Tubicolar Annelida" : Geol. Mag., Dec. II, Vol. VII, pp. 109-115, 



171-174, 215-222, 258-266, 304-307, 362-369, PL VII (contains all requisite 



references to other literatui'e) . 

 Haast, J. 1872 A. "Report on the Geology of the Malvern Hills": Explor. 



Rep., 1871-72, pp. 1-85, map and 6 pis. of sections (see pp. 5, 6, 79). 

 Haast, J. 1872 B. " Notes on the Geology of the Glentui, a branch of the River 



Ashley, Province of Canterbury": JExplor. Rep., 1871-72, pp. 85-88, and 



1 pi. of sections. 

 Haast, J. von. 1879. " Geology of the Provinces of Canterbui-y and Westland, 



New Zealand." 8vo ; Christchurch, N.Z. Chapter vii: The Mount Torlesse 



Formation, pp. 266-280 (see p. 275). 

 Haast, J. von. 18S5. " On the Geological Structure of the Southern Alps of New 



Zealand, in the Provincial Districts of Canterbury and Westland": Trans. 



N.Z. Inst., xvii, pp. 332-337 (see top of p. 335). 

 Haast, J. von. 1887. " Notes on the Age and Subdivisions of the Sedimentary 



Rocks in the Canterbury Mountains, based upon the Pabicontological Researches 



of Professor Dr. C. Baron von Ettingshausen, etc." : Trans. N.Z. Inst., 



xix, pp. 449-451. 

 [Hector, J.] 1878. Appendix [list of fossiliferous localities]: Explor. Rep., 



1877-78, pp. 189-210. 



1 See p. 575. 



