CEPHALOPODA. 



75 



jihragmocone is never preserved, but casts of the alveolus show that it was 

 chambered, that it had a single dorsal ridge, a ventral process passing into the 

 fissiu'e of the guard, and an apical nucleus. 



AcAXTHOTEUTHis (Waguer), jMiinstcr. 



Etym., acantha, a spine, and teutlus. . 



Syn.y Kelseno (Munstcr.) Belemnoteuthis ? 



Tyi^e, A. prisca, Ruppell. 



Fovmded on the fossil hooks of a calamary, preserved in the Oxford clay 

 of Solenliofen. These show that the animal had 10, nearly equal ai'ms, all 

 fm-uished with a double series of horny claws, throughout their length. A 

 l)en like that of the ommasirephes has been hypothetically ascribed to these 

 arms, which may, however, have belonged to tht belemnite or the helemno- 

 ieuthis. 



Belemnoteuthis (Miller), Pearce, 1842. 



Tyiie, B. antiquus (Cunnington), fig. 33. 



Shell consisting of a phraymocone, like 

 that of the belemnite ; a horny dorsal joen 

 with obscure lateral bands; and a thin 

 fibrous guard, \Yith two diverging ridges on 

 the dorsal side. 



Animal provided with arms and tenta- 

 cles of nearly equal length, furnished with 

 a double alternating series of horny hooks, 

 from 20 to 40 pairs on each arm ; mantle 

 free aU round ; fins large, medio -dorsal 

 (much larger than in fig. 33). 



Fossil in the Oxford clay of Chippen- 

 ham. Similar horny claws have been found 

 in the lias of Watchctt; and ^ guard equally 

 thin is figm-ed in Buckland's Bridgewater 

 Treatise, t. 44, fig. 14. 



Irf the fossil calamary of Chippenham, 

 the sheU is preserved along with the mus- 

 cular mantle, fins, ink-bag, funnel, eyes, 

 and tentacles with their horny hooks ; all 

 the specimens were discovered, and deve- 

 loped with miexamplcd skill, by William 



Buv, of Sutton, near Chii)penham. „. „ , ,, . ^ 



^^ Fig. 33. Bd,;mnoieuthis* 



* Fig. 33. Belemnoteuthis mitiquus, \, ventral side, from a specimen in the cabinet 

 of William Cunnington, Esq., of Devizes. The last chamber of the phragraocone is 

 preserved in this specimen, a, represents the dorsal side of an uncompressed phrag 

 mocone from the Kelloway rock, in the cabinet of J. G. Lov/e, Esq. ; c, is an ideal sec- 

 tion of the same. Since this woodcut was executed, a more complete specimen has 



E :i 



