684 



MOLLUSCA— CEPHALOPODA 



PHYLUM VI 



margin rounded. An impression of tlie animal found in the Lithographic Stone 



Pio. 1324. 



A can thofeu this spec losa 

 Miinst. Lithographic 

 Stone ; Eichstiidt. A, 

 Impression of shell, the 

 proostracum accident- 

 ally bent sideways. /;, 

 Prcjostraeiini showing 

 se]ita and siphonal 

 funnels, -/g. 



"^'^^ 

 ^^\ 





'^.=^^»'' 





ff 







\ 



a 

 V, ''^\ "of I 



^^v^^\> ^N 







Fig. 1324. 



I II lu2''). 



Acfi nthotcuthis spcc'iosa 

 Miinst. Lithographic 

 Stone ; Solenhofen. Pro- 

 ostracum. -/;> 



• Fiii. 1323. 



AccmthofeutJds speciosa Miinst. Lithographic 

 Stone ; Eichstiidt, Bavaria. Impression of arms 

 and body. l/.i. 



shows an ink-bag and ten powerful arms about the head, 

 which arc beset with two rows of ojjposite, hornj^, falciform 

 booklets. Upper Jura. 



Phrucjmoteuthis Mojs. (Fig. 1326). Proostracum twice 

 as long as the conical phragmacone, with dorsal area 

 bounded by asymjitotic lines, and two shoiter lateral areas ; 

 anterior margin of all ai-eas rounded. Phragmacone invested 

 liy 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 

 phragmacone, which is not produced into a long proostracum. 

 Upper Callovian and Lower Cretaceous. 



Family 3. Spirulidae Zittel. 



Shell reduced to a chambered, ^^h/ragmncone coiled into aflat 

 spiral, the coils not in contact ; situated in posterior jjart of 

 the body, and the greater portion contained within the mantle, hi 



