cxiv INFERIOR OOLITE AMMONITES. 



Locality and Stratum. — Dorset : Stoke Knap, Building Stone, layer 3. 

 Date of Existence. — Discitse hemera. 



4. Daeellia concinna, 8. Buchman. Suppl., Plate XVIII, figs. 16—18. 



Description. — Subconcavumbilicate, levigate. 

 Distinction. — From D. toxeres, the smaller umbilicus. 



Locality and Strata. — Dorset : Bradford Abbas, Fossil Bed, upper part. 

 Somerset : Dundry, Limestone and Marl Beds. 

 Date of Existence. — Discitse hemera. 



In the next species the radial line is less regularly biarcuate, tabulation of 

 periphery is more pronounced, and the carina is more prominent (subalticarinate). 



•5. Daeellia (?) polita, S. Buchman. Plate XVI, figs. 3, 4, (Type); figs. 5, 6; 



Suppl., Plate XVIII, fig. 31. 



1889. Hyperlioceras Walkeri, This Monogr., PI. xvi, figs. 3 — 6 (not figs. 1, 2, 



7—11). 

 1898. Darellia polita, 8. Buchman, 'Jurassic Time'; Quart. Journ. G-eol. Soc, 



vol. liv, p. 459. 



Description. — Augustumbilicate ; costate to semicostate and to levigate. 



Remarks. — The example figured in Plate XVI, figs. 5, 6, does not agree with 

 the type in umbilication, and ought, perhaps, to be distinguished as a separate 

 species. 



The largest example of this species in my cabinet measures 110 mm. incomplete; 

 it attained a size of 135 mm. It is very like Toxolioceras Walkeri (PI. XVI, figs. 1, 

 2) in general appearance, but distinguishable by a narrower periphery. 



Localities and Strata. — Dorset : Bradford Abbas, Fossil Bed ; Stoke Knap, 

 Building Stone. 



Date of Existence. — Discitse hemera. 



Subalticarinate, with tendency to decline. 

 Relatively stout whorls. 



The two following genera differ from any of the preceding carinatitabulate 

 series, in the stouter proportions of the whorls, and in their radial lines; these 

 characters suggest relationship with the genera Lucya and Depaoceras. 



The genera arc distinguished from each other (1) by the radial line, of which 



