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GASTEROPODA OF THE INFERIOR OOLITE. 



222. Amberleya (Turbo) Milleri, Wright, MS. Plate XXIII, fig. 5. 



Description : 



Length ..... 15 — 25 mm. 

 Length of body-whorl to total height . . 60 : 100. 



Spiral angle .... 62°. 



Shell conical, turbinate, rather thin. Number of whorls about eight ; apicals 

 rather convex and smooth, remaining whorls but slightly tumid ; suture well 

 impressed. In the whorls of the spire the ornaments consist of finely tuber- 

 culated spirals increasing in number up to about five ; these are nearly equal in 

 degree of salience, but in the penult the lower one slightly projects ; fine axial 

 costee and stria? decussate the spirals. 



The body-whorl has about seven spirals, the upper ones being usually the 

 most spinulose ; the two lower ones are more closely tuberculate, and constitute a 

 slight double keel (sub-eucycloid). In the base are nearly a dozen spirals, slightly 

 tuberculate and with fine intermediate axial stria?. Aperture subcircular, with a 

 short and rather straight pillar lip. 



Relations and Distribution. — Through Amberleya densinodosa this turbinate 

 species is connected with the eucycloid Amberleyas, whilst, on the other hand, it 

 has obvious relations with the species next described. Although there are forms 

 figured by Goldfuss, d'Orbigny, and others which approach Amberleya {Turbo) 

 Milleri, it seems to stand out with sufficient distinctness to be accepted as a 

 species of Amberleya which still retains some trace of the eucycloid character. 



It is fairly plentiful in the concavus-hed at Bradford Abbas. 



223. Amberleya (Turbo) turbinoides, sp. nov. Plate XXIII, fig. 7 and ? fig. 6. 



Description : 



Length . . . . .25 mm. 



Length of body-whorl to total height . . 48 : 100. 



Spiral angle .... 44°. 



Shell conical, subelongate, turbinate. Number of whorls about eight ; those 

 in the upper part of the spire are rather flat, but become angular towards the 

 penult ; suture wide and finally gaping. 



The ornaments exhibit considerable variety ; in the middle stage the whorls 

 possess four or five finely tuberculated spirals, the lowest being the longest and 

 most prominent, forming a kind of keel. In the penult the spirals become more 



