CLASS V 



CEPHALOPODA 



665 



Subfamily F. Reineckiinae Hyatt. 



Discoidal shells with costae single on the lateral zones but bifurcated on their 

 outer parts, and 

 with one or two 

 lines of tubercles, 

 the first being 

 near the point of 

 bifurcation 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. 



Eeineckia (Fig. 1289), Parkinsonia Bayle (Fig. 1290); Occoptychius Neum. (Fig, 

 1291); ^tt/acos<e2^/i.a'ft«s Sutner and Pomp ; (?) Waagenia Neum.; /S'ircnocfirtts Hyatt 

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



Fig. 1290. 



Parkinsonia jparlcinsoni (Sowb.). Inferior Oolite ; 

 Bayeux, Calxados. 



Fig. 1291. 



OecoptycMus rcfractus 

 (lie Haan). Callovian ; 

 Niort, France (after 

 d'Orbigny). 



Family 26. Aspidoceratidae Zittel. 



Earlier volutions costate, later ones with one or tivo rows of tubercles. Venter broad, 

 never keeled. S&pta resemhlinf/ those of Dactylioidinae, but saddles and lobes broader, and 



Fig. 1292. 



Aspidoceras 'perarmatiim {Bowh.). Oxfordian ; 

 Dives, Calvados. 1/2. 



Fio. 1293. 



Svmoce.ms volanensc. (Oppel). 

 Lower Tithonian ; Monte Catria, 

 Central Apennines. 



dorsal sutures with only one large pair of inner or first dorsal lobes, the outer or second 

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



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



