Mr. J. Morris on a new species 0/ Belemnite. 355 



Morris has also directed my attention to the fact^ that Colonel 

 Portlockj with his usual acumen, had described similar bodies as 

 occurring in the flints of the Irish chalk, and that the species 

 described by him under the name of Entobia a-etacea (and ar- 

 ranged among the Annelides) is probably the same as the Clio- 

 nit es Conybearei before adverted to. 



Clionites Mantelli. PI. V. C. figs. ] & 2. 



Cells small, oviform, numerous, more or less closely aggre- 

 gated, connected together by minute slender canals. External 

 openings rather large. 



Locality. In the substance of the shell of an Inoceramus from 

 the Upper Chalk of the Isle of Wight. 



Highgate, Sept. 29, 1852. 



XXXIV. — Description of a species of Belemnite, with Observa- 

 tions on Aptychus. By J. Mokris, F.G.S, 



[With a Plate.] 



The following species of Belemnite, obtained by M. Bouchard 

 of Boulogne from the lias of France, appears to be sufficiently 

 distinct from any species figured by M. D'Orbigny in the 'Paleon- 

 tologie Pranyaise,^ and to differ somewhat from the Belemnites 

 usually found in the lias, and may be described as follows : — 



Belemnites Bouchardi. PI. V. E. figs. 1, 2, 3, 4. 



iTesta brevi, conica, subcompressa, unisulcata ; apice obtuso, ru- 

 goso, alveolo magno, apertura subquadrata. 



A Belemnite with a very short, conical and slightly compressed 

 rostrum, the apex obtuse and marked by numerous granulose 

 ridges (fig. 4 a); the fibrous substance of the shell is extremely 

 thin ; the alveolar cavity is large, and occupies nearly the whole 

 length of the rostrum ; the ventral furrow is very distinct, and is 

 prolonged from the apex to the aperture, which is subquadrate. 

 Tile posterior side is slightly compressed by tM^o rather obscure 

 furrows, which become obsolete towards the opening. 



This species in the general form and large alveolar cavity re- 

 sembles Bel. brevirostris, D^Orb. ; it is however less conical, and 

 the broad continuous furrow and rugose apex will readily distin- 

 guish it from that species. 



Locality. From the Upper Lias of Vicux Pont, Calvados. 

 Length 1^ inch, aperture 6 lines. 



23* 



