﻿HISTORICAL NOTICES. 



11 



Inferior Oolite . . . B. sulcatus, Mill. Considered to be the equivalent of B. apici- 



conus, of Blainville. Dundry. 

 Lias .... . — acuarius, Sckl. (It is supposed by Prof. Morris to be identi- 



cal with B. tubularis of Young and Bird 

 and B. lagenaformis of Zieten.) Whitby, 

 Yorkshire ; Gloucestershire. 



„ — acutus, Mill. Shornecliff; Charmouth. 



,, . . . . . . — aduncatus, Mill. Lyme ; Weston. 



„ . . . . . — breviformis Folic. Gloucestershire. 



,, . . . . . . — brevirostris, D'Orb. Cheltenham. 



„ . . . . . . — compressus, Voltz. Yorkshire. 



„ • . . . . — elongatus, Mill. Somerset ; Dorset ; Ross ; Cromarty. 



,, . . . . . . — longissimus, Mill. Lyme ; Western ; Boll. 



,, — paxillosus, Voltz. Yorkshire ; Gloucestershire. 



„ . . . . . . — penicillatus, Bl. Dorset ; Gloucestershire. 



,, . . . . . . — pistilliformis, Sow. Charmouth. 



,, . . . . . — subaduncatus, Voltz. Yorkshire. 



,, . . . . . . — trifidus, Voltz. Yorkshire. 



In 1S55 Mr. S. P. Woodward, besides giving a compendious and effective classifica- 

 tion of the Belemnitidoe as a group of Cephalopoda Tetrabranchiata, presented a drawing 

 of the solid parts of the Belemnitic animal seen dorsally, 1 and another of Bdemnoteutlds 

 antiquus seen ventrally. 2 In his supplement (1856) he calls attention to a specimen in 

 the possession of Mr. Buckman which exhibits the fossil ink-bag within the phragmocone 

 of a Belemnite. The classification here referred to will be considered hereafter. 



The work of Mr. Martin Simpson (1855) on the 'Fossils of the Lias of Yorkshire' 

 includes notices of forty species and varieties of Belemnites, of which specimens may be 

 seen in the Whitby Museum. I have examined that collection carefully, and have found 

 it very instructive. Mr. Simpson's descriptions are careful, but, being unaccompanied by 

 figures, inspection of the original specimens is necessary for understanding the distinctions 

 relied on. 



For the latest and most important additions to our knowledge of the structure of 

 Belemnitidae by British authors we are indebted to Prof. Huxley's descriptions of 

 some remarkable specimens obtained by Mr. E. H. Day from the Lower Lias near 

 Charmouth. In this elaborate memoir 3 the facts embodied in the various statements of 

 previous observers are re-examined, and a nearly complete view is furnished of the 

 structure and relations of the solid parts of the Belemnitic animal. In particular, the 

 anterior solid parts {pro-ostracum) are placed in their true significance, both in the 

 Belemnites of ordinary form, as B. elongatus, and in the new genus Xiphoteuthis. To 

 this valuable essay we shall again refer. 



1 'Manual of the Mollusca,' pi. ii, fig. 5. 



2 Ibid., p. 75. 



3 "British Organic Remains" ('Memoirs of the Geological Survey'), Monograph 2, 1864. 



