APORRHAIS. 253 



V- 



2. A. MACAN'DREJS*, Jeffreys. * 



^. pes-carbonis, F. & H. iii. p. 186, pi. kxxix. f. 5, 6. 



BODY whitish, with a triangular patch of light pink on the 

 neck : snout not extending as far as the foot, tinged on the 

 upper side with pink, and divided down the front by a flake- 

 white line or streak : tentacles sometimes curved like the horns 

 of an ox, one on each side of the snout, speckled towards the 

 tips with flake-white, and marked on the upper side by a white 

 line down the middle ; tips blunt, and yellow : eyes prominent, 

 on short tubercles or stalks : foot narrow, in front obtusely 

 rounded or nearly truncated, with a short angular corner at 

 each side, behind pointed. 



SHELL much smaller and of a more delicate shape and finer 

 texture than the last species ; when young it is thin, transpa- 

 rent, and glossy : sculpture nearly similar ; but the ribs on the 

 last two whorls are less knotty ; the riblets on the upper whorls 

 are more numerous ; the spiral striae are stronger and fewer 

 on the lower part of the body-whorl and on the back of the 

 outer lip, and are sometimes alternately large and small: colour 

 whitish, sometimes having a pale fawn tinge : spire rather 

 short ; it does not taper as in the other species, nor is the apex 

 so liable to be broken off : whorls 7-8, convex, but not angu- 

 lated : suture less distinct between the lower whorls, owing to 

 the above want of angularity : mouth proportionally shorter 

 and wider: outer lip relatively larger, more palmated and 

 flatter, divided into 4 processes, besides the basal point; all 

 these form spikes, and far exceed in length the digitated pro- 

 cesses of A. pes-pelecani ; in the present species the upper- 

 most spike frequently extends beyond the spire in a parallel 

 direction, and is bent backwards ; the lowermost spike has 

 about the same length, and is also finely pointed, being 

 slightly curved outwards ; the three spikes which belong to 

 the pterygoid flap or expansion project considerably, and are 

 separate ; the smaller two resemble the fork made by divided 

 fingers ; all the spikes are similarly grooved ; the inside of 

 the outer lip is microscopically pustulated: inner lip thin, 

 spread over the lower side of the last three whorls; basal 



* Named in honour of the discoverer, Mr. Robert M'Andrew, who has 

 done so much to increase our knowledge of the Mollusca of the European 



