428 GASTEROPODA OF THE INFERIOR OOLITE. 
teristic of the Ornate, being related on one side to the turrited, and on the other 
to the depressed forms. 
The best specimens are from the Parkinsoni-zone of Burton Bradstock, where 
also the var. dentata occurs. From the Humphriesianus-zone at Bradford Abbas I 
have a specimen something between Pl. armata var. precatoria, and Pl. Sauzeana, 
d’Orb. Smaller and less characteristic specimens of P/. armata are found in the 
' Sauzei-bed of the Sherborne district and at Louse Hill, both in the Humphriesianus- 
zone. 
369. Prevroromarta, cf. Sauzpana, d’Orbigny, 1850. Not figured. 
1850. Prevroromarta Savzeana, d’Orbigny. Prod., i, p. 267. 
1854. — — — Terr. Jur., vol. ii, p. 457, pl. 
eee] xxili. 
1873. — ae -- Tawney, Dundry Gasteropoda, 
p. 51 (48). 
Specimens referred to this species do not quite fit in with the description and 
figure in the ‘Terrains Jurassiques.’ Yet there are specimens from Dundry 
reaching up to 90 mm. in height, which approach more nearly to Pl. Sauzeana 
than to the most elongate varieties of Pl. avmata. The fineness of the nodulations 
in Pl. Sauzeana is one characteristic feature. I have already alluded to the 
specimens from the Irony Bed of Bradford Abbas (Humphriesianus-zone). These, 
together with the Dundry specimens, are distinguished in my Collection as Pl. 
* sub-Sauzeana.” 
370. PLevRotomaria TUBERCULOSA, Defrance, 1826. Plate XXXVII, figs. 4a, 4b. 
1826. PiruroromMarra TUBERCULOSA, Defrance. Dict. Sci. Nat., vol. xli, p. 382, 
pl. lxxxvi, fig. 3. 
1854. -- — — Morris, Cat., p. 272 (I. O., 
Bridport). 
Syn. — ornata, Deslongchamps (especially var. suLCIFERA). Vol. 
cit., p. 37, pl. iv, fig. 3. 
— — — — D’Orbigny, Terr. Jur., vol. ii, 
p. 449, pls. ecelxvi, ecelxvii. 
Non. — TUBERCULOSA, Zieten (1830). Verstein. Wiirt., p. 47, 
pl. xxxvy, fig. 3. 
Bibliography, §c.—Deslongchamps, and after him d’Orbigny, regarded this 
species as identical with Tvochus ornatus, Sow. Tawney (op. cit., p. 49) did not 
