SUPPLEMENT.— HYPERLIOCERAS. 



figs. 1, 2, will indicate this form; but it is not compressed 

 around the umbilicus. It lias a much heavier carina. 

 Quenstedt's A. discoideus is without test; but the cast seems 

 to indicate a heavy keel. The inner margin of this form 

 does not agree with Quenstedt's figure (see Fig. 85) ; it is 

 more like that of D. subsectum. 



Locality and Stratum. — Dorset : Bradford Abbas, Fossil 

 Bed (my father's Collection). 



Date of Existence. — Discitse hemera, presumably. 



Subcrassicarinate. 

 The carina not so coarse as in the preceding species. 



Tig. 85. — A. discoideus, 

 Quenst., tracing of type. 



4. Deltotoceras subsectum (S. Buchman), Plate XIX, figs. 3, 4; Suppl., Fig. 86, 



p. clxv. 



1889. Htperlioceras discoideum a, This Monogr., PI. xix, figs. 3, 4, only. 

 1902. Deltoceras subsectum, Emend. Amm. Nom., p. 3. 



Description. — Subgradumbilicate (inner margins of whorls overhanging umbili- 

 cus) ; levigate ; whorl-section acutely triangular ; densiseptate, sublongisubangusti- 

 lobate. 



Note. — Suture line differs slightly from that of preceding series. 



Remarks. — For distinction from the last species and from A. discoideus, 

 see p. 99. 



Localities and. Strata. — Bradford Abbas, Fossil Bed, evidently upper 

 part ; Gloucestershire : Wistley Hill, near Cheltenham (Lower Trigonia-Qrit ; 

 ' Quart. Journ. Geol. Soc.,' vol. li, p. 414, sect, xix, Bed 2). 



L. Genus — Hypeklioceras, S. Buchman. 



(Type : Hyperlioceras discites, Waagen, sp.) 

 1889. Hyperlioceras, This Monogr., p. 88. 



Definition. — Perplatyleptogyral ; angustumbilicate ; subpauciseptate, brevi- 

 subangustilobate ; laterally flexiradiate ; peripherally acutanguliradiate, penetabu- 

 late, alticarinate. (Radial line fig. 87, p. clxv.) 



Notes. — The ribs are subfalcate, with a long peripheral projection. The 

 gradumbilicus shown by Waagen is incorrect, it is filled with matrix in the 

 original. 



Q 



