Ixxxii INFERIOR OOLITE AMMONITES. 



yet to be discovered, would show the tortiradiate character, but less costation than 

 Lucy a and more carina. Radial line and periphery separate them from Paquieria. 



5. Brasilia similis (S. Buclcman). Plate XV, figs. 1, 2 ; Plate A, fig. 13 ; Suppl., 



Plate XI, fig. 36. 



1889. Lioceras decipiens, var. simile, This Monogr., PI. xv, figs. 1, 2. 



Description. — Platyleptogyral, gradumbilicate, strii-parvicostate to lsevigate. 

 Locality and Stratum. — Dorset: Beaminster district, from the ironshot stone, 

 equivalent in date to the Stoke Knap Building Stone. 1 

 Date of Existence. — Bradford en sis hemera, presumably. 



6. Brasilia decipiens (S. Buclcman). Plate XII, figs. 8, 9 ; Suppl., Plate XI, fig. 35 ; 



Fig. 43 in text. 



1888. Lioceras decipiens, This Monogr., PI. xii, figs. 8, 9. 



Description. — Platyleptogyral, excentri-gradumbilicate, levi- 

 gate. 



Note. — Small costas are visible in the umbilicus. 



Distinction. — From Br. similis, more compressed, more ex- 

 centrumbilicate, smoother. 



Note. — Cosm. cirrata is angustilobate, less carinate, begins the 

 exceutricity of umbilicus earlier. 



Locality and Stratum. — Dorset : Sherborne, from the Bhyn- 

 chonella ringens bed. In the type there is a specimen of that fossil 

 Fie. 43.— Radial imbedded. 



line of Brasilia 



decipiens. Date of Existence. — Bradfordensis hemera. 



7. Brasilia effricata, S. Buclcman. Plate VII, figs. 3, 4. 



1888. Lioceras ambiguum, This Monogr., PL vii, figs. 3, 4. 

 1902. Brasilia effricata, Emend. Amm. Nom., p. 3. 



Description. — Platyleptogyral, subexcentri-gradumbilicate, levigate. 



Note. — Judging by a younger specimen, small costae change to striae before a 

 diameter of 40 mm. is attained, and these soon become very faint. Excentricity of 

 the umbilicus begins at about 80 mm. diameter. 



Distinction. — From Br. decipiens greater compression, and a larger, though less 

 excentric umbilicus. 



1 Better acquaintance with the lithic characters of the deposits in the Beaminster district 

 enables me to say this. 



