Notes on South African Mollusca. 163 



min. 18"5 ; alt. max. 172; apert. 13-2 x 11 mm. ; ends of peristome 

 5-6 mm. apart. 



Animal of specimens from Fielding's Chabeesies and Stinkfontein. — 

 Colour (in alcohol) : whitish, tinged with grey towards the hind end 

 of the foot and on the head ; mantle-edge pale, but roof of mantle- 

 cavity greyish near the edge, and along the rectum and one or two 

 of the chief veins. Left body-lobe consisting of two portions con- 

 nected by a fold, both divisions being prominent, though the left 

 one is narrow (see PL IV., fig. 5, which also shows the arrangement 

 of the pulmonary veins and the form of the kidney, in which features 

 the present species does not differ much from the other members of 

 the genus). Pedal gland partially embedded in the muscles of the 

 foot. 



Jaw 1'6 to 1"7 mm. long, rather narrow, thin, yellow-brown (PI. IV., 

 fig. 22). Eadula of a Fielding's Chabeesies specimen, the shell 

 of which measured 24 mm. in diameter, 4'6 x 1'8 mm. ; transverse 

 rows of teeth trending slightly forwards on each side of the middle 

 line, where they form a very obtuse angle ; cusps of inner marginals 

 longer than in the other species (see PI. IV., fig. 14, which shows the 

 shapes and sizes of individual teeth) ; ectocones can be distinguished 

 on about 70 per cent, of the teeth, though they are sometimes 

 very small ; formula (45 + 1 + 45) x 137. A specimen from Stink- 

 fontein had a very similar radula measuring 4-6 x 1'9 mm., the 

 teeth being almost identical in appearance with those figured, and 

 the formula being (48 + 1 + 48) x 135. Crop and salivary glands 

 surrounded with darkly pigmented connective tissue (PI. IV., fig. 26). 



Eeproductive system (PL IV., fig. 30 ; PL V., fig. 6) : hermaphro- 

 dite duct very slender and closely convoluted; vesicula seminalis 

 rather small ; free oviduct somewhat swollen ; receptaculum seminis 

 small, with a slender duct; vagina rather long ; vas deferens rather 

 closely bound to the penis for the greater part of its length ; penis 

 long, curved posteriorly. 



Hab. Great Namadand. Between Aos and the Orange River. 

 Little Namaland. Stinkfontein ; Fielding's Chabeesies. 



The Type set is in the Berlin Museum. 



It consists of two shells, one so bleached that its ornamentation 

 is unrecognizable ; the other smaller and apparently some time 

 deceased, but showing clearly the beautiful mottling, which is 

 such a prominent characteristic of the species. With the Types 

 is another bleached example, agreeing with them in form, from 

 the Lower Orange River. 



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