44 HELIX-AMPELITA. 



Mr. Layard sent a smaller whitish variety from Swellendam, and 



another variety (white with chestnut bands) from Bredasdorp, to 

 the northeast of Cape Lagulhas. Mr. Layard reports that the eyes 

 of those varieties are situated at the upper and inner side of a length- 

 ened knob turning down from the summits of the upper tentacles. 

 The foot, when the animal is withdrawn into the shell, looks like 

 raw meat ; and the animal greedily devours other living mollusks 

 confined with it, but in the bush is attracted in numbers by pieces 

 of water-melons placed as a bait. 



The species is placed in both Macrocyclis and Ampelita by Pfeiffer, 

 in Ampelita by Dohrn. It may prove to belong to the Agnatha, 

 near Rhytida or Aerope. 



H. GALACTOSTOMA Pfeiffer. PI. 10, figs. 30, 31. 



Shell umbilicate, convex-orbicular, solid, striate, granulate under 

 a lens, brown ; spire short, apex obtuse ; whorls 4*, slightly convex, 

 slowly widening, the penultimate angulated, the last somewhat 

 depressed, deflexed in front ; base angular, descending into the 

 moderate, open umbilicus (not exceeding 1 the diameter). Aperture 

 very oblique, lunar-oval, milk-white within ; peristome simple, brown- 

 edged, margins converging, joined by a callus; right margin very 

 narrowly expanded, basal margin subreflexed, columellar margin 

 white, dilated-reflexed above the umbilicus. (Pfr.) 



Alt. 18, greater diam. 36, lesser 31 mill. 



Madagascar. 



H. galactostoma PFR. Proc. Zool. Soc. London, 1849, 130 ; Mono- 

 graphia iii, p. 238 ; Conchylien Cabinet, p. 550, t. 166, f. 8, 9. 

 REEVE, Conch. Icon., f. 192. 



H. COVANI Smith. PI. 7, figs. 89, 90, 91. 



Shell broadly and openly umbilicated, moderately thick, orbic- 

 ularly depressed, lightish brown, becoming more olivaceous upon 

 the spire, decussately sculptured with fine spiral strias and oblique 

 lines of growth producing a subgranulated surface. Spire depressed 

 with slightly convex outlines, and a somewhat raised apex. Whorls 

 5-5J, rather convex, enlarging moderately slowly and separated by 

 an impressed suture; last volution large, rounded at the periphery, 

 a little descending and compressed anteriorly, more feebly sculptured 

 beneath, except within the umbilicus, than above, and exhibiting no 

 trace of an angulation around the umbilicus. The latter is open 

 and perspective to the apex. Aperture oblique, white. Peristome 



