Mar. DACTYLIOCERATIDM xv 



1919 



Genus, CADOCERAS, Fischer 



Man. Conchyl. et Pal. Conch. (1880-1887), Fasc. iv, p. 394, May 5, 1882. 



" Coquille tres renflee ; ombilic etroit, carene ; dernier tour entiere- 

 ment lisse. Tours precedents avec des cdtes formant un angle dirige en 

 avant sur la region ventrale. Ex. C. modiolare, Luid." 



Originally proposed as a subgenus of Stephanoceras. 



Type to be taken as C. modiolare ; Fischer ; for there is nothing in 

 d'Orbigny's figure and description of ' "Am. modiolaris, Luid." to indicate 

 character of ribs on whorls preceding smooth stage. There are two series 

 of modiolaris-\ike adults — one with preceding whorls conforming to 

 Fischer's diagnosis, the other with these whorls carrying ribs straight 

 across periphery. The type of Cadoceras must be a modiolaris-\ike form 

 of the first series — a specimen with Fischer's label, if such exist. 



Genus, ANISOLOBOCERAS, Trueman 

 1918, Abs. Proc. Geol. Soc, p. 66. 

 " Genoholotype, Ammonites nautiliformis, J. Buckman " 

 Sufficient of the suture-line of Am. nautiliformis, Holotype, Pis. 

 XXXVII a, B, has now been exposed to show abbreviated EL and 

 very long L x , of which outer branch encroaches on EL territory. 



Inscribe Pis. XXXVII a-d Anisoloboceras nautiliforme and make 

 similar corrections in text. 



Genus, AMAUROCERAS, S. Buckman 



1913, Y.T.A. II, p. vii. 

 Place Am. lenticularis , No. 20, here and make suitable alterations. 



Genus, FISSILOBICERAS, nov. 



Genoholotype, F. fissilobatum, Waagen sp., S. Buckman Coll. No. 554, 

 Bajocian, [Shirbuirnia, Sandford Lane], Sherborne, Dorset, which will 

 be figured at an early opportunity. Like degenerate (smooth) Euhoplo- 

 ceras (Y.T.A. II, 1913, % v ) but more involute, with more intricate suture- 

 hnejmd L^ has very anisobceles terminal lobule. 



Family, CYMBITIM), nov. 



Primitive Arietans with ceratitoid suture-line. Cymbites, Paroniceras 

 Frec/nella ; HudUstonia ? 



Family, DACTYLIOCERATIDM, nom, nov. 



In place of Dactyloidae, error for Dactylioidce, Hyatt, as more con- 

 iormable to rule. 



