SUPPLEMENT.— DUMORTIERI A. clxxxi 



23. Dumortieria penexigua, 8. Buchnan. Plate XLII, figs. 3—5. 



1891. Dumortieria radians, This Monogr., PI. xlii, figs. 3 — 5 only. 

 1902. „ PENEXictUA, Emend. Amin. Num., p. 5. 



Description. — Subplatysubleptogyral ; sublatumbilicate ; striate ; periphery sub- 

 tabulate ; subcarinate. 



Distinction. — -From IK signata, much finer ornament; slightly stouter whorls, 

 broader, flatter periphery. 



24. Dumortieria externicompta (Branco). 



1879. Harpoceras subundulatum, var. externe comptum, Branco, Unt. Dogger, 

 Abh. G-eol. Spez. Karte Elsass-Lothringen, Bd. ii, PI. iii, fig. 5 only. 



Remarks. — This species has in the inner whorls rather coarse distant ribs, 

 which change rapidly to fine striae; these are slightly bunched towards the inner 

 margin. The umbilicus is smaller and the whorl broader than in D. dvphyes. 



Localities and Stratum. — Gloucestershire : Bowcott Wood, Cephalopoda Bed, 

 upper portion (Moorei Beds) ; Buckholt Wood. 



Date of Existence. — Moorei hemera. 



25. Dumortieria subpasciata, 8. Buclcman. Plate XXX, fig. 18. Suppl., Fig. 



177, p. cxcvi,and Fig. 178 in text. 



1890. Dumortieria radiosa, This Monogr., PI. xxx, fig. 18. 



1891. var. gundershofensis, p. 254 (pars). 



Description. — Platysubleptogyral, sublatumbilicate, the umbilicus bordered by 

 definite margin ; striate, with tendency to more prominent 

 distant striation at about 3<> mm. diameter. Periphery convexi- 

 fastigate, carinate. 



Note. — The striae are irregular along the inner edge of the 

 whorl, as if gathered into small bunches. This character suggests Fl .°- . 17s -~~ "'."' ""'" 



' O o° tiena subfasciata. 



the trivial name. Section of w1 ""' 



Distinction. — From D. gundershofensis, Haug, thinner, more finely striate, 



with a less tabulate periphery. 



Localities and Stratum. — Gloucestershire: Frocester Hill and BuckhoU Wood, 



in the Cephalopod Bed. 



Date of Existence. — Moorei hemera. 



