lviii INFERIOR OOLITE AMMONITES. 



XVII. Genus — Manselia, 1 S. Bud-man. 



(Type — Manselta suLj'alcata, sp. n.) 



Definition. — Platyleptogyral, augustumbilicate ; subdensiseptate, 

 sublongi-subangusti-lobate ; laterally subflexiradiate ; peripherally 

 ariguliradiate, subacutifastigate, parvi-nonsepti-carinate. 



Distinction.— -From Ancolioceras, the radial line has less peripheral 

 projection; the suture-line has longer, somewhat narrower lobes, fig. 15.— Radial 

 From Hyattina, the more acute periphery, and the longer lobes of the S ubfaicat,i. 

 suture-line. From Hyattia, greater compression. 



1. Manselia subacuta, S. Buclcman. Suppl., Plate XIII, figs. 4 — 6. 



Description. — Platyleptogyral, gradumbilicate, subparvi-costate. 



Remarks. — A doubt may be expressed whether this species is correctly 

 assigned to a genus, whereof subfalcata is the type. The costation is of a coarser 

 character, and the lobes of the suture-line seem to be shorter in proportion. 



Localities and Strata. — Dorset : Symondsbury, near Bridport, from a yellowish 

 sandy matrix — a similar bed contains Zeilleria anglica ; Bradford Abbas, from 

 the Paving Bed. 



Date of Existence. — Murchisonse hemera. 



2. Manselia subfalcata, S. Buclcman. Suppl., Plate XI, figs. 25 — 27. 



Description. — Platyleptogyral, gradumbilicate, parvicostate. 



Distinction. — There is some likeness to Am. Murchisonse falcatus, Quenstedt, 

 but that shell has a more tabulate, more distinctly carinate periphery. From 

 subacuta, less coarse ornament. 



Localities ami Strata, — Dorset: Halfway House, near Sherborne, from a 

 greyish limestone, evidently the bed just above the Sands. 2 Gloucestershire : 

 Leckhampton Hill, from the Pea Grit, or Lower Freestone. 



Date of Existence. — Murchisonse hemera. 



1 In compliment to Air. J. C. Mausel-Plejdell, F.L.S., F.G.S., President of the Dorset Natural 

 History and Antiquarian Field Club. 



2 " Bajocian Sherborne District," ' Quart. Joum. Geo'. Soc.,' vol. xlix, p. 48G, sect. 4, Bed 11. 



