SUB-CLASS ii DIBRANCHIATA f,'.M) 



Acanthoteuthis, Wagner and Miinst. (Belemnites, Qiu-n.-t. ]>.j'. ; Ostracoteuthis, 



Acanthoteuthis speciosa, 

 Miinst. Eiclistadt. A, '. 



muuau. JHWUDUHJ.VI ^i, . "* -^ 



Impression of shell, the '"^2^^ / ^. ^~> f ^ 



proostracum accident- 

 ally bent sideways. B, 

 Proostracnm showi 

 septa and s 

 funnels. 2/ g . 



FIG. 1248. 



Acanthoteuthis speciosa, 

 Miinst. Solenhofen. Pro- 

 ostracum. 2/3. 



FIG. lJ4ii. 



Amnthoteuthis speciosa, Munst. Lithographic 

 Slates ; Eiclistadt, Bavaria. Impression of arm* 

 and body. V a . 



Zitt), (Figs. 1246-1248). Phragmocone with numerous 

 septa, and siplmncle having short siphonal funnels ; 

 enveloped externally in a thin granular calcareous layer 

 representing the guard. Surface of proostracum divisible 

 into a broad dorsal, and two narrow lateral areas which 

 are longitudinally striated and taper toward the front. 

 Dorsal area ornamented with fine parabolic and also 

 straight longitudinal lines ; anterior margin rounded. 

 An impression of the animal found in the Lithographic 

 Slates shows an ink-bag and ten powerful arms about 

 the head, which are beset with two rows of opposite, 

 horny, falciform booklets. Upper Jura. 



Phragmoteuthis, Mojs. (Fig. 1249). Proostracum 

 twice as long as the conical phragmocone, with dorsal 

 area bounded by asymptotic lines, and two shorter 

 lateral areas; anterior margin of all areas rounded. 

 Phragmocone invested by a brownish layer represent- 

 ing the guard. Trias (Raibl Beds). 



Belemnoteuthis, Pearce (Conoteuthis, d'Orb.), (Figs. 



