lxviii 



INFERIOR OOLITE AMMONITES. 



Fig. 25.— Radial 



line of 



Wiltshireia 



gigantea. 



b. Magnilobate. 

 XXIII. Genus — Wiltshikeia, 1 8. Buckman. 



(Type — Wiltshireia gigantea, S. Buckman.) 



1888. Lioceras (pars), This Monogr., p. 21. 



1899. Wiltshireia, Tbis Monogr., Expl. of Suppl. PI. XI (misprint). 



Definition. — Platy-subpachygyral, angustumbilicate; paucisep- 

 tate, longi-sublatilobate ; laterally subanguliradiate ; peripherally 

 obtusanguliradiate, subfastigate, parvi-nonsepti-carinate. 



Distinction. — This genus resembles Kiliania in general mode 

 of growth and proportions; any difference in the definition is due 

 to the generic types not being in the same stages of phyletic deve- 

 lopment. Even the radial curve is the same, but the suture-line is 

 entirely distinct ; it is of a bold type with a large superior lateral 

 lobe. Comparing the homoeomorphs of the two genera, namely 

 Wiltshireia gigantea and Kiliania? gallica, 2 at almost the same 

 diameter, the superior lateral lobe of the former is twice as long 

 and broad as that of the latter, so that one loculus in the former 

 occupies the space of two loculi in the latter. 



1. Wiltshireia gigantea (S. Buckman). Plate XI, fig. 1; Plate XII, fig. 4; 



Plate A, fig. 12; Suppl., Plate XI, 

 fig. 31 ; Plate XV, figs. 7, 8. 



1888. Lioceras bradforoense, var. giganteum, This Monogr., PI. xi, fig. 1 ; 



PI xii, fig. 4; PI. a, fig. 12. 



Description. — Platy-subpachygyral, gradumbilicate ; costate, declining 



to 



Note. — The type specimen (PI. XI, fig. 1) was, judging by the position of its 

 last septum, as much as 330 mm. in diameter when alive. 



Localities and Strata. — Dorset : Stoke Knap, near Broad Windsor, in the base 



1 In compliment to the Rev. Dr. T. Wiltshire, F.G.S. 



' 2 Kiliania? gallica, sp. n. I give this name to a remarkable homceomorph, a foreign specimen 

 kindly presented to me by Mr. L. Brasil. Suppl., PI. XV, figs. 7 and 8 a, may represent it, but not 

 fig. 8. It is parvilobate. The character of suture-line, shown in figs. 3 or G, of Suppl., PI. XV, must 

 be added to figs. 7 and 8 a to get a correct representation. " Bradfordensis beds, May-sur-Orne, 

 Calvados." 



