CLASS V 



CEPHALOPODA 



665 



Siibfaiiiily F. Reineckiinae Hyatt. 



Discoidal shells with costae siiigle on the lateral zones but bifuicated on their 

 outer parts, and 

 with one or two 

 liiies of tubercles, 

 the first being 

 iiear the point of 

 bifurcatioii of the 

 costae, and the 

 other near their 

 ventral termini. 

 Division of costae 

 takes place along 

 ventro - lateral 

 angles and not on 

 or near the um- 

 bilical Shoulders. 

 Costae cross the 

 venter only in 

 the coronate 

 young, when the 

 section is trape- 

 zoidal as in Goeloceras. Sutures as in the preceding subfamily. 



Reineckia (Fig. 1289), Parkinsonia Bayle (Fig. 1290); Oecoptychius Neum. (Fig. 

 1291); Äulacostephanus Sutner and Pomp; (?) Waagenia Neum.; Strenoceras Hyatt. 

 Type *S^. (Ammonites) niortense (d'Orb.). Middle and Upper Jura. 



Fio. 1290. 



Farkinsonia farkinsoni (Sowb.). Inferior Oolite ; 

 Bayeux, Calvados. 



Fig. 1291. 



Oecoptychius refractus 

 (de Haan). Callovian ; 

 Niort, France (after 

 d'Orbigny). 



Family 26. Aspidoceratidae Zittel. 



Earlier volutions costate, later ones with one or two rows of tubercles. Venter hroad, 

 never keeled. Septa resemhling those of Dactylioidinae, hut saddles omd lohes hroader^ and 



Fig. 1292. 



Aspidoceras 2iemrmatum (Sowb.). Oxfordian 



Dives, Calvados. V'2- 



Fi«;. 1293. 



Simocfnu^ volanense (Oppel). 

 Lower Titlionian ; Monte Catria, 

 Central Apennines. 



dorsal sutures loith only one large pair of inner or first dorsal lobes^ the outer or second 

 pair being incomplete in the more discoidal species as in the Arietidae. 



Aspidoceras Zittel (Fig. 1292); Peltoceras Waagen (Fig. 1294); (?) Aurigcrus 



