210 PROCEEDINGS OF TH K MALACOLOGICAL SOCIETY. 



DESCEIPTIONS OF COLOUR VARIETIES OF CONUS QUERCINUS, 

 HWASS, AND CYPRjEA LAMABCKII, GRAY. 



By H. 0. N. SuAw, B.Sc, F.Z.S. 



Read 13th November, 1914. 



CoNDS QUEKCiNDs, Tar. ALBUs, D.var. 



I HAVE thought it worth while to note this variety of Conns 

 quercinus, Hwass, for which I propose the varietal name alhts, on 

 account of the following peculiarities. In the first place, the colour 

 is snow-white. The apex of the spire is a warm rose-brown, and the 

 shell is entirely devoid of the usual fine thread-like, transverse brown 

 markings. With regard to form, the shell, for its length, is wider 

 across the shoulder of the last whorl than is usually the case, while 

 the shoulder is more angular, and the spire very much flatter. The 

 spiral striations of the latter, and on the bodj^-whorl, particularly on 

 the upper half, are coarser and more deeply engraved than on typical 

 examples of the species. The shell, which is in excellent condition, 

 was collected at Aden. Length 58 mm., max. breadth 34 mm. 



Cype^a lamakckii, var. phyllidis, n.var. 



I have recently received from Aden four specimens of what 

 appears to be a new variety of the above species. They are in 

 diiferent stages of growth and size, the largest being a perfect 

 example, 40 mm. long. Tliis variety is more elongate, less ventricose, 

 and the dorsum less humped than in the typical C. lamarclcii, Gray, 

 while the base and teeth are fairly normal, though the two anterior 

 labial teeth are slightly less accentuated. The colour and markings 

 are entirely different. The sides are slightly thickened and pure 

 white. The whole of the dorsal surface is a pale translucent yellow- 

 brown extending down to the white sides. This colouring is 

 punctuated on each side by numerous fine red-brown spots, which 

 extend upwards on each side to the dorsal surface, where they are 

 less distinct. It may indeed be said that the whole of the sides and 

 dorsal surface are covered with these fine brown spots. The apex of 

 the dorsum is suffused with a faint patch of pink. From the fore- 

 going, the features not occurring in the typical shell will be seen, and 

 they may be further accentuated by saying that the large deep-brown 

 spots on each side, the brown colouring of the dorsal surface, the pale 

 dorsal space, the innumerable white spots (sometimes ocellated), and 

 the brown markings of each extremity, all characteristic of a typical 

 specimen, are in tliis variety entirely absent. There is not a single 

 white spot on any of the four shells before me. For this beautiful 

 and striking variety I propose the namQ pJujllidis. 



