The Non-Marine Mollusca of Portuguese East Africa. 149 



and deeper umbilicus, and slightly more rapidly increasing whorls ; while it 

 appears to be higher in the spire, with weaker sculpture and considerably 

 less rapidly increasing whorls than smithi. 



TracTiycystis pinguis (Krs.), 1848. 



1848. Helix pinguis Krs., Sudafr. Moll., p. 75, pi. 4, fig. 19. D.F. 



'1879. Hyalina pinguis Krs., Mts., Monatsb. Ak. Wiss. Berlin, p. 736. L. 



Hab. L. Marques. Tette (Peters). 



It is most improbable that the shells cited by von Martens can be the 

 true pinguis of Krauss. Dr. Thiele kindly informs me that the set in the 

 Berlin Museum, which probably represents them, consists of rather im- 

 mature examples, of which the largest measures 4-7 X 2-9 mm. Thev are 

 in any case congeneric with Gndeella mixta Smith, which seems, however, 

 to be proportionately rather greater in diameter and less in altitude. 



Subfamily PUNCTINAE. 



Genus Punctum Morse, 1864. 



Punctum kottentotum (M. and P.), 1891. 



1891. Helix hottentota M. and P., A.M.N.H. viii, p. 239. D. 



1892. „ „ „ „ ix, p. 94, pi. 4, fig. 6. F. 

 Hab. L. Marques. Bandula Siding (Mcdowell). 



The shells from this locality agree fully with those of the same species 

 from Jesmond and many other southern districts. It is interesting to set 

 ou record that I have recently been shown by Mr. J. Hewitt, Director of 

 the Albany Museum, a living example of P. Jiottentotum which was found 

 among the feathers of a loerie, Turacus corythaix, shot by Dr. G. Rattrav 

 at Hogsback, Amatola Mts., C.P. From its position, the snail appeared to 

 have adhered there during the bird's lifetime, a fact which may afford some 

 explanation of its comparatively wide distribution. 



Some notes on the anatomy of this species are given below.* 

 The foot has well-marked peripodial grooves. The tentacles are dark, 

 and the top of the head is also more or less pigmented. The posterior 

 aorta and its principal branches, and to some extent the efferent pulmonary 

 vein, are coated with a conspicuous white deposit ; and this is also true of 

 the afferent pulmonary vein that runs down the hinder margin of the 

 mantle-edge. The posterior part of the roof of the mantle-cavity shows 

 some streaks of dark pigment. 



* These notes are taken from specimens found at Belle Vue, Upper Mooi River, Natal, 

 for which the writer is indebted to Mr. H. C. Bumup of Pietermaritzburg. 



