Reference List of South African Non-marine Mollusca. 155 
Hab. Lirrne Namauanp. Springbok (Lightfoot; Day). Henkries 
(Lightfoot). 
; 291. TRIGONEPHRUS NAMAQUENSIS (Melv. & Pons.). [S.A.M.] 
1891 Helix (Dorcasia) namaquensis, M. & P., A.M.N.H. viii. p. 237. D. 
1892 ee + a ix. p.94. pl. 4, 
i ny 
1893 ne »  Pilsb., Man. of Conch.viii. 
p. 262. pl. 28,f.1. DF. 
1910 Helix (Trigonephrus) namaquensis, M. & P., Bttg., Abh. 
Senckenb. Naturf. Ges. Frankfurt, xxxii. p. 440. N. 
Type in British Museum. 
Hab. Lirttn Namauanp (Péringuey). Muishond; Meskiep ; 
Kamaggas (Schultze). 
292. TRIGONEPHRUS PORPHYROSTOMA (Melv. & Pons.). [S.A.M.] 
1891 Helix (Dorcasia) porphyrostoma, M.&P.,A.M.N.H. viii. p.238. D. 
1892 3 Y 2 ix. p. 94. pl. 4, 
ee ea ci 
1893 - »  Pilsb.,Man.ofConch.viii. 
p. 262. pl.28,f.3. DF. 
1910 Helix (Trigonephrus) rosacea, Mill., var. porphyrostoma, M. & P., 
Bttg., Abh. Senckenb. Naturf. Ges. Frankfurt, xxxii. p. 441. 
pl. 20, 0, 7. NE, 
Type in British Museum. 
Hab. Urrttr Namauanp (Miss Morris). Port Nolloth (Day). 
Great Namatanp. Lower Orange River ; Gous (Schenck). Angra 
Pequena (Schneider), 
This coarse form of Trigonephrus is that most frequently found 
subfossil in old middens. Bdttger is probably right in considering it 
to be a variety of rosaceus, but as the latter is so nearly allied to 
globulus, it appears advisable to await fuller knowledge of the animal 
before bringing either into synonymy. 
293. TRIGONEPHRUS ROSACEUS (Miiller). (S.A.M.] 
1774 Helix rosacea, Mill., Verm. ii. p. 76. D. 
1788 4 »  Gmel., Syst. Nat., Hd. 13. i, 6. p. 3636. D. 
1817 Se 7  Dillw., Deser. Cat: p. 921, dD. 
1838 * » Desh., Hist. nat. An. s. Vert. viii. p.94. N. 
1839 MA , donas, Archiv. f. Naturg. v, 1. p. 339. 
ply Ok, By 4 ee 
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