SUPPLEMENT.— CYPHOLIOCERAS. xliii 



17. Lioceras comptum (Beinecke). Suppl., Plate VII, figs. 7 — 12. 



1818. Nautilus comptus, Eeineclce, Maris protog. Naut. et Argon., pi. i, figs. 



5, 6. 



Description. — Platyleptogyral, subexcentri-angustumbilicate, flexistriate be- 

 coming flexicostate ; subdensiseptate, subinornatilobate. 



Remarks. — The identification of the figured specimens with Reinecke's comptus 

 seems to be justifiable. His figure certainly shows a flexistriate shell which is, 

 comparatively with other species of this genus, somewhat latumbilicate, somewhat 

 pachygyral. These comparative characters seem to be very closely approached 

 in the small specimen depicted in Suppl., PI. VII, figs. 7, S. 



It will be noticed that the identification of comptum in the body of the work 

 has now undergone considerable revision. Some of the forms identified therewith 

 are not sufficiently umbilicate, others too thin or too costate. 



Localities and Strata. — Dorset : Burton Bradstock, with the foregoing species ; 

 Beaminster, in an oolitic limestone. 



Bate of Existence. — Scissi hemera. 



By the kindness of Mr. L. Brasil, of Caen, I have seen specimens from 

 Normandy of this genus, as now restricted. They represented the species 

 uncinatum and gracile ; and others were allied to uncum, gracile, and costosum. 



VIII. Genus — Cypholioceras, 1 S. Buckman. 



(Type — Cypholioceras plicatum, sj>. n.) 

 1887. Lioceras, This Monogr., pp. 12, 21 (pars). 



Definition. — Platyleptogyral, angustumbilicate ; subdensiseptate, subbrevilati- 

 lobate ; laterally flexiradiate ; peripherally acutanguliradiate, subacutifastigate, 

 parvi-nonsepti-carinate. 



Note. — The definition is drawn up from the type, except the part which refers 

 to the suture-lines; that is taken from a specimen of G. opaliniforme, and its 

 suture-line is figured in p. 30 with the appellation Lioceras opalinum. 



Distinction. — Separable from Lioceras as now defined and restricted, by the 

 longer peripheral projection of the radii (see figs. 1, 2, p. xxxiv) ; also when the out- 

 lines of the body-chamber edge of adult specimens of the two genera are compared 



1 Kvqus, bent. 



