20 SUPPLEMENT TO GREAT OOLITE MOLLUSCA. 



dwarfed testacea, collected by Mr. Moore from the upper portion of the Great Oolite in 

 the vicinity of Bath. 



ACTEON PHASIANOIDES, Lye. Tab. XLIY, fig. 28. 



Testa parva ovato-elongata, subletve, spira alta, turrieulata afractibus 5, superne con- 

 vexis, in/erne planatis, anfractu ultimo magno, ovato, bast temrrime striato, apertura 

 ettiptia, eolumclla recta, uniplicatd. 



Shell small, ovately elongated, nearly smooth ; spire elevated, turreted ; volutions 5, 

 convex above, the sides flattened, and the sutures strongly defined ; the last volution 

 slightly exceeds half the entire length of the shell ; it is ovate, its base having some delicate, 

 regular spiral striations ; the aperture is. elliptical, the columella straight, having a single 

 plication. 



Possibly the entire surface may have had striations still more delicate than those at the 

 base, but no traces of them remain ; the spire is larger, and the volutions are more inflated, 

 than is usually seen in this genus. 



Geological Position and Locality. The Great Oolite of Minchinhampton, collected by 

 E. Witchell, Esq. 



j 



AOTEONINA BREVIS. Tab. XLI, fig. 6. 



Under the title of Cylindrites brevis, an immature and imperfect example was figured 

 in the first part of the 'Great Oolite,' Monograph. Tab. VIII, figs. 13, 13, a; the fine 

 example now figured was collected by Mr. Whiteaves in the Great Oolite of Kirklington, 

 Oxon., and exhibits in the more advanced stage of growth a change in the last volution, 

 whose upper margin rises higher than those of the preceding volutions, thus rendering the 

 vertex slightly concave, a change with which recent conchology presents many analogous 

 instances. The figure of the columella leaves no doubt that it is an Acteonina. 



ACTEONINA KIRKLINGTONENSIS, Lye. Tab. XLI, fig. 5. 



Testa ovato-cylindriea, donyata, Itsviffata, spira obtusa, pcrspicua, anfractibus (4) 

 depressiz, columella ad basin cortorta, apertura inferne elongata, ovata. 



Shell ovately cylindrical, elongated, smooth ; spire obtuse, depressed, the upper margins 

 of the volutions exposed and rounded ; columella contorted at its base, forming with inner 

 lip an umbilical depression ; aperture narrow above, pyriform, lengthened, and rather 

 pointed at its base. 



A lengthened cylindrical Acteonina, with an exposed, obtuse spire, which does not rise 

 higher than the upper border of the last volution ; a small specimen is, in proportion, 



