144 Anjiah of the South African Museum. 



enecl 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. 32'0 ; 

 diam. 30*3 ; apert. 19'0 x 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 show^s 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 6J-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). 



Hah. Cape Province. Generally distributed along the coast 

 from Algoa Bay {fide Layard) to St. Helena Bay ; Piobben 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. 



