ROOM V. 



BELEMXITES BELEMNOTEUTHIS. 



459 



! 



receive the apical portion of the 

 chambered phragmocone, and ex- 

 panding proximally, becomes con- 

 fluent with the capsule. 



3. The Phragmocone, or cham- 

 bered, siphunculated, internal shell, 

 (&,) the apex of which occupies the 

 cavity of the guard, and the upper 

 part constitutes a capacious cham- 

 ber, from the basilar margin of 

 which proceed two long, flat, testa- 

 ceous processes, (a.). 



These structures comprise all that 

 are at present known of the animal 

 to which the fossil commonly called 

 " Bdemnite " belonged. 



In the specimen discovered by 

 my son, Mr. Reginald Seville Man- 

 tell, in the Oxford Clay, near Trow- 

 bridge, (and which first showed the 

 investing capsule of the guard and 

 phragmocone, and the processes of 

 the latter,) there is a thin layer of a 

 carbonaceous substance of a fibrous 

 structure, spread over the interspace 

 between the elongated processes ; 

 and this is the only trace of the 

 soft parts of the animal of the 

 Belemnite, that has come under 

 my observation. 1 



BELEMNOTEUTHIS. Lign. 100. 

 Table-case 3. Associated with 

 the Belemnites in the Oxford Clay 

 of Wiltshire, there are great num- 

 bers of the osselets of a cephalopod 

 allied to the Sepiadae, which the 

 late Channing Pearce, Esq of Bath, LIGN . IOO ._BEL E MXOT E UTHIS AXTIQUUS, 

 described under the name of Belem- FROM OXFORD CLAY, CHRISTIAN MAL- 

 noteuikis antiquus, in a communi- 

 cation to the Geological Society, in 

 1842. Mr. Pearce stated, " that the 

 lower part of this cephalopod is 

 conical, blunt at the apex, and 

 chambered internally, like the al- 

 veolus (phragmocone) of a Belem- 

 nite, with a siphunculus near the 

 edge of the chambers. It has a 

 brown thick shelly covering, which 

 gradually becomes thinner towards the upper part. 



PORD, WILTS. ($ not. size.) 

 (Drawn by S.P. Woodward, Esq.) 

 a. The arms, and tentacula. 

 6. Remains of the head. 



c. The mantle, with indications of lateral 



d. The ink-bag, covered by the pallial 



integument. 



e. The osselet; the transverse lines indi- 



cate the septa of the phragmocone. 

 /. The apex or rostrum of the osselet. 



Above the cham- 



See my " Pictorial Atlas of Organic Remains," p. 171 



