430 bullidjE. 



Ac era bulla'ta"^ Miiller. 



Akera bullata, Mull. Prodr. Zool. Dan. p. 242, no. 2921 ; F. & H. iii. 

 p. 527, pi. exiv. d. f. 4-6, and (animal) pi. V Y. f. 6. 



Body varying in colour from greyish or nearly clear white 

 to pale yellowish-white or orange, covered with minute and 

 numerous flake- white or dark specks, and usually streaked in 

 front with interrupted lines of purplish-brown : mantle spread 

 over the underside of the shell, and partly over the spire or 

 crown : head, when the animal is crawling, attenuated, and 

 sheathed underneath by the side lobes of the foot ; it is wedge- 

 shaped and bilobed in front (so that occasionally the corners 

 assume the shape of ears or tentacles), and margined by a 

 narrow purplish -brown line : eyes small and black, but always 

 perceptible : foot oblong, swollen at its base ; side lobes or flaps 

 slightly tuberculated ; front rounded and narrower than the 

 posterior portion, where the foot dilates and is truncated at 

 the extremity, with angular corners : [odontophpre, rhachis 

 minute, erect, broader at the base, which is produced on each 

 side, having the top expanded and compressed on the upper 

 part, the cutting-edge bent downwards and one-cusped, with a 

 notched crest on each side; uncini about 21, forming: Ions: 

 hooks which are longer in the middle row, the first furnished 

 on the inner side with short wings and jagged, the rest always 

 more slender (Loven) :] gizzard composed of a dozen triangular 

 plates. 



Shell forming a short oval, dilated in the middle, and almost 

 equally broad at each end, semitransparent and glossy : sculp- 

 ture, extremely fine, close-set, and wavy microscopic spiral 

 striae, which pervade the whole surface : epidermis filmy but 

 distinct, brownish-yellow of different shades : colour, under 

 the epidermis, whitish with sometimes a faint tinge of green : 

 spire truncated, sometimes slightly prominent : whorls 6, ridged 

 or keeled at the top ; the first is globosely oval and intorted : 

 suture deep and channelled, with sloping sides ; it is slit or 

 narrowly open in front for a considerable distance, so as to 

 disconnect the outer part of the body-whorl from the preceding 

 whorl, and to make the shell elastic when held between the 

 thumb and fingers: mouth somewhat contracted above, and 

 very wide below, with a rounded base ; it extends nearly the 

 whole length of the shell : outer lip flexuous. folding inwards 



* Inflated. 



