AZECA. 295 



Moquin-Tandon's description and figures of A. tridens are 

 said to be from specimens of this variety. According to Saint- 

 Simon the appendix is long with club-like end, similar to that 

 figured for Chondrus quadridens on pi. 22, f. 3, of Moquin- 

 Tandon's Mollusques de France. The jaw is composed of about 

 20 wide plaits. Its ends are pointed, as in Zonites lucidus. 

 Radula with 80 rows of 14, 8, 1, 8, 14 teeth, the marginals with 

 4, laterals with 2 cusps. Central teeth very small. 



Var. GOODALLI (Ferussac). PI. 46, figs. 3, 4, 5. 



The obesely fusiform shell is comparatively shorter than in 

 menkeana, composed of 6J to 7 whorls, the last swollen and 

 whitish behind the outer and basal lip margins, the outer lip 

 being excised and rather thin in the upper third, blunt and 

 narrowly expanded below. Parietal lamella, supraparietal 

 denticle and cord along the edge of the parietal callus about as 

 in A. menkeana. Columella strongly dentate at base, and with 

 a broad white vertical lamella above, scarcely visible except in 

 oblique view. Outer lip having a stout marginal tooth opposite 

 the parietal lamella, but usually no lower palatal fold, and 

 there are no deep seated internal teeth within the outer wall. 



Length 5.5 to 6, diam. 2.5 mm. 



England, type loc. " by the river Stour." Southern France. 



Turbo tridens PULTENEY Catalogues of the birds, shells and 

 some of the more rare plants of Dorsetshire, p. 46, in Hutchin's 

 History of Dorset, (1799). Not Turbo tridens Gmelin 1791 

 (Helix tridens Miiller). DACOSTA, Testacea Brit. p. 338, pi. 

 11, fig. 2 (1803). MONTAGU, Testacea Brittanica, 1803, p. 

 338, pi. 11, fig. 2. Azeca tridens FORBES & HANLEY, Hist. Brit. 

 Moll, iv, p. 128, pi. 125, f. 9. Helix goodalli FERUSSAC, Tab- 

 leau Systematique la Famille des Limagons, p. 71, no. 492ter. 

 (1821), no description; based upon Turbo tridens of Pulteney 

 and Montagu. Carychium politum Jeffreys, Trans. Linnean 

 Society of London xvi, p. 365 (18*29). Pupa brittanica 

 KENYON, The Magazine of Natural History etc., (Louden's), i, 

 p. 427 (1829). Azeca matoni "Leach, Mollusc, p. 122, t. 8, 

 f. 8," TITRTON, Manual of the land and fresh-water shells of the 

 British Islands, p. 68. fig. 52 (1831). Azeca nouletiana DUPUY, 



