PULMONATA. 147 



not proposed as possessing any value, except in so far as it may contribute towards 

 the attainment of that end. 



Section A. Pullus small, conical. 



a. Shell turbinate or pyriform ; costated or coronated j 

 inner lip effuse; columellar plaits few. 



a. Transversely furrowed. 



No. 87. Voluta luctatrix. Solander. Tab. XVIII, fig. 3. Tab. XIX, fig. 3 a— e. 



Limington Thorney-ribs, Petiver, 1/64. Gazophylacium, t. 78, fig. 11. 

 Strombus luctator, Solander, 1766. Brand. Foss. Hant., p. 30, figs. 64 and 67. 

 — dubius — — — fig. 68. 



Voluta mdsicalis, Webster, 1814. Geol. Trauc, 1st ser., vol. ii, p. 204. 



— luctator Sowerby, 1816. Min. Con., vol. ii, p. '29, t. 115, fig. I. 



— — — 1823. — vol. iv, p. 134, t. 397. 



V. testa elongato-turbinatd, costatd, transversim sulcata, antice late emarginatd ; apice 

 acuto : anfractibus superne concavis, anyulatis, undserie spinarum, costas coronantium, dona- 

 tis ; spinis brevibus, cuspidatis : aperturd in medio effusd, antice angustatd ; columella duas 

 plicas obhipias proeminentes gerenti ; labro ad marginem crenulato, intus Icevi, in juventd 

 sape plicifero, incrassato. 



Shell elongately top-shaped, contracted in front, longitudinally ribbed, transversely 

 furrowed; whorls angular at the shoulder, concave between the angle and the suture, 

 and widely, but not deeply, notched in front ; ribs sharp, curved, extending over nearly 

 two thirds of the whorls, and crowned by a single row of erect, laterally compressed 

 spines. In young shells the ribs are numerous, and a second row of small, irregular 

 spines runs round the sutural margin ; but the ribs become more distant, and the 

 second row of spines disappears as the shell approaches maturity. The furrows are 

 numerous, regular, rather broad and flat, and roughened by the prominent lines of 

 growth. Spire elevated and pointed, the embryonic shell consisting of two or three 

 very small, roundish, whorls ; aperture angular behind, effuse at the middle ; columella 

 round, nearly straight, furnished with two unequal, oblique, prominent folds towards the 

 front, the anterior one of which is the larger, and generally with two or three smaller 

 ones behind. The outer lip in the young shell thickened and frequently plicated within ; 

 the plaits, however, when they do occur, disappear as the shell is enlarged, and in adult 

 specimens the inner surface of the lip is smooth ; in all stages of growth the outer lip 

 is crenulated on the margin. Not infrequently, specimens occur in which the pearly 

 matter, deposited by the margin of the mantle, remains ; it is spread over the front of 

 the body whorl, extending backwards almost to the suture. 



Lamarck has cited Strombus luctator (Brand., fig. 64) as identical with his V. musicalis; 



