SUPPLEMENT.— DEPAOCEBAS. 



lxxvii 



1. Paineia nitkxs, 8. Buchman. Fig. 33 in text. 



Description. — Platyleptogyral, subangustumbilicate, subcostate to striate. 



is rather too prominent in the outline view. 



Remarks. — From the costate to the striate stage the radial line changes. 



Two or three costas are connate to form single costse in the inner area. The 

 costas of the outer lateral area decline as soon as those of the inner. 



Localities and Strata. — Dorset: presumably Sherborne, Ambers Hill, Rh. 

 ringens-bed (my father's collection). Somerset: Stoford, in a yellow matrix. 



Date of Existence. — -Bradfordensis hemera, presumably. 



XXIX. Genus — Depaocebas, 1 8. Buchman. 



(Tyjje, Bepaoceras fallax, S. Buckinan.) 

 1902. Depaocebas, Emend. Aram. Norn., p. 3. 



Definition. — Platysubleptogyral, subangustumbilicate ; subdensi- 

 septate, sublongi-subangustilobate ; laterally subanguliradiate; peri- 

 pherally anguliradiate, subacutifastigate, subparvi-nonsepti-cari- 

 nate. 



Distinction . — From Lucya, earlier time of changing radial line, 

 more acute periphery. From Lioceras, stouter mode of growth, 

 smaller umbilicus, more distinct carination at one stage. 



Note. — Tliis genus is in many respects comparable with 

 Lioceras. L. uncinatum shows a kind of anguliradius, indicative 

 perhaps of a tortiradiate ancestor common to Lioceras and the 

 present series. 



1 Ae7Tas, a bowl. 



io. 34.— Radial 



line of 



Depaoccras 



fallax. 



