332 EEV. E. BOOG WATS02T ON THE 



obliquely cut off, twisted and rounded in front into a prominent 

 thin point. H. 2'75. B. 1*25. Penultimate whorl, height 0-53. 

 Mouth, height 1-73, breadth 0-6. 



This species is suggestive of many others, and may be com- 

 pared with Voluta nopestris, Gm., V.pacijica, Sol., V. lyriformis, 

 Vigors, and V.fuhninata, Lam, ; but resembles most V. megaspira, 

 Sow., having the same long thickened lip and form of body-whorl, 

 but in that species the spire is higher and is fine. 



Wttillea, n. gen. 



Animal a typical Volute. 



Shell ovate, cymbiform, thin, rough ; spire high scalar ; apex mamillate 

 and irregular ; suture canaliculate ; nioutli large, ovate ; inner lip with a 

 widespread thinnish callus ; pillar perpendicular, with a very slight turn ; 

 it has no teeth, but an abrupt break of the edge about the middle of its 

 length. 



This genus differs from Cymhiola of Swainson (the description 

 of which by Adams I have nearly followed) notably in the tex- 

 ture of the shell, which is extremely delicate but rough on the 

 surface, in the suture, which is canaliculate, and in the straight 

 pillar, which is without teeth, but has an abrupt break on the 

 edge. In all the Volutes the last tooth consists of a lamina 

 attached to, or consisting of, the edge of the pillar, the twist on which 

 throws this lamina out as an oblique fold whose abrupt slope 

 looks up the pillar. In Wyvillea, on the other hand, the lamina 

 has scarcely a turn at all, and only presents a tooth in consequence 

 of being suddenly arrested and diminished in size ; from this 

 results a tooth whose abrupt slope looks down the pillar. 



In connexion with this genus it may be well to recall the 

 Ilalia of Eisso, which has some vague features of superficial 

 resemblance ; but in that genus the columellar tooth, which is 

 almost terminal, results from the extreme and sudden twisting of 

 the pillar. 



I have not given a detailed description of the animal, as Prof. 

 Huxley has undertaken the dissection and full representation of 

 it in all its parts. 



"Wttillea aiabastkina, n. sp. 



St. 147. Dec. 30, 1873. Lat. 46° 16' S., long. 48° 27' E. 

 Off Marion Island and the Crozets. Bottom temperature 34°-2. 

 Ghhigerina-oozQ. 1600 fms. 



Animal has an enormous bifid foot, square in front, pointed 



