670 



MOLLUSCA 



PHYLUM VI 



yoiitliful whorls ai'e coiled spirally in a jilane ; at maturity the whorl straightens out 

 tem^jorarily, often bending Lack again in a hook-shaped body-chamber. 



Pig. 13C5. Fi«- 130G. 



Spiroceiw hifiircatum (Qunnst.)- Upper Dog.uer (Cal- Aiicyloceras -mathcroriianum(VOrh. Neocomian ; 



lovian); Ehniii;,'en, Wiirtcmlierg. J, Shell with i)rotocoiicli Castellane, Basses AJpes. .(, Conch, r,, Suture- 



bi-oken away, Vi- ' ^'> Portion of venter. (', Sntnre-line. line. 



Sjiiroceras Quenstedt (Fig. 1305), Lower Oolite, supposed to be derived from 

 Parkinsonia. Grioceras Leveille i Anryloceras d'Orb. (Fig. 1306). Cretaceous. 



Subfamily E. Scaphitinae Meek. 



Whorl close-coiled in youth, opening out at 

 maturity into a hook- 

 shaped body - chauiber. 

 Form robust, thick -set, 

 involute, surface highly 

 ornamental with ribs 

 and knots. Sej^ta finely 

 digitate, usually with 

 several auxiliary lobes. 



Scaphites Parkinson 

 (Figs. 1162, 1307, 1308); 

 Fici. 130S. Discosraphites Meek ; 



Scaphitcs aeijualis Sowb. Jalinites Hyatt. Creta- 



Ceii oni an i an ; Rouen, 



Fi(i. 1307. 



SccqihUea sjiinifii'r Schliitei-. Uppi'i- Creta 

 ceous (Senonian) ; Cousfeld, Westphalia. 



France, i/i 



ceous. 



