684 MOLLUSCA— CEPHALOPODA phtldm vi 



margin rounded. An iniprÄssion of the animal found in the Lithographie Stone 



■X\ 



(f' f ^ 



Fio. 1324. 



Acanthoteuthis speciosa 

 Münst. Lithographie 

 Stone; Bichstiidt. A, 

 Impression of shell, the 

 proostracum accident- 

 ally bent sidevvays. Jl, 

 rrnoslracuni showing 

 septa and siphonal 

 funnels, 2/3. 



-Ä*-Ä 



VA it5 







bw" 



Fl(i. 132: 



A canthotruthü speciosa 

 Münst. Lithographie, 

 Stone ; Solenhofen. Pro- 

 ostracum. 2/„^ 



Fig. 1323. 

 AcantlwteutMs speciosa Münst. Lithographie 

 Stone ; Eichstädt, Bavaria. Impression of arms 

 and body. 1/2. 



shows an ink-bag and ten powerful arnis about the liead, 

 which are beset witb two rows of opposite, liorny, falciforni 

 liooklets. Upper Jura. 



Phragmoteuthis Mojs. (Fig. 1326). Proostracum twice 

 as long as the conical phragmacone, with dorsal area 

 bounded by asymptotic lines, and two shorter lateral areas ; 

 anterior margin of all areas rounded. Phragmacone invested 

 by a brownish horny layer representing the guard. Trias 

 (Raibl Beds). 



Belemnoteuthis Pearce {Gonoteuthis d'Orb.) (Figs. 1327- 

 1328). Like Acanthoteuthis but with smaller and curved 

 pliragmacone, which is not produced into a long proostracum. 

 Upper Callovian and Lower Cretaceöus. 



Family 3. Spirulidae Zittel. 



Shell reduced to a chamhered phragmacone coiled into a flat 

 Spiral, the coils not in contact ; situated in posterior pari of 

 the hody, and the greater portion contained within the mantle. In 



