I 1 I Annuls of tlie South African Museum. 



ened and somewhat reflexed, ends joined by a thin callus ; outer lip 

 making with the body whorl an angle of about 125, and imparting 

 a drooping appearance to the aperture. Columella erect, slightly 

 concave, margin reflexed, partially concealing the narrow umbilicus. 



Dimensions of a typical specimen from Hout Bay : Alt. max. 32 - ; 

 diam. 3O3 ; apert. 19'0x 15 - 7 mm. ; ends of peristome 15 mm. apart. 



Animal of a single full-grown specimen from Milnerton, the shell 

 of which measured about 32 mm. in altitude. 



Colour drab, probably due to long immersion in alcohol ; roof of 

 mantle-cavity unpigmented. Body-lobes indistinguishable, owing 

 to the bad preservation of the specimen. Principal pulmonary 

 vein giving off more numerous transverse branches than usual 

 (see PI. IV., fig. 1, which also shows the form of the kidney, etc.). 



Cerebral ganglia covered with grey connective tissue. Jaw 

 2-9 mm. long, more curved than usual, reddish brown and of 

 moderate thickness, with scarcely a trace of a median projection 

 (PI. IV., fig. 17). Eadula 6^x3J mm.; transverse rows of teeth 

 almost straight ; teeth relatively larger than in the allied species ; 

 centrals very similar to the laterals ; outer marginals longer and 

 narrower than usual, with single well-developed cusps (see PI. IV., 

 fig. 9) ; formula (45 + 1 + 48) x 115. Eadula-sac projecting beyond 

 the buccal mass (PI. IV., fig. 7). 



Eeproductive system (PL V., fig. 1) : hermaphrodite duct slender, 

 with broader convolutions than in the other species; vesicula 

 seminalis club-shaped, rather thick ; receptaculum seminis oval ; 

 anterior third of receptacular duct swollen ; vagina short, somewhat 

 swollen ; vas deferens curving a little further round the free oviduct 

 than usual ; epiphallus longer than in the other species, being 

 nearly one-third of the length of the penis ; posterior part of penis 

 curved ; rugae on the longitudinal folds inside the penis diamond- 

 shaped, being much narrower than in the remaining species 

 (PI. IV., fig. 27). 



Hab. CAPE PROVINCE. Generally distributed along the coast 

 from Algoa Bay (fide Layard) to St. Helena Bay ; Eobben and 

 Dassen Islands. 



Type in Copenhagen Museum. 



A large sinistral specimen, collected by Craven on Eobben Island, 

 is in the British Museum. 



The late E. L. Layard, through whose hands passed most of the 



* In order to avoid unnecessary repetition in describing the animals of the 

 species, only those parts will be mentioned which have been found to differ in the 

 various forms. 



