TURRITELLA, 205 



T. DECIPIENS, Monts. PI. G4, fig. 3. 



Whorls about 10, convexly flattened, the suture slightly 

 marked, with crowded revolving lines, the earlier whorls carinate 

 in the middle, afterwards becoming indistinct, the middle line a 

 little more prominent than the others, base concave, defined by 

 a sharp angle ; light yellowish brown to chestnut-brown, with 

 fine flexuous chestnut stripes and spots. Length, 1 inch. 



Gabes, Tunis. 

 It is T, subangulata, Auct., not Brocchi. 



T. ALBA, H. Adams. PI. 64, fig. 4. 



Turreted, thin, white; whorls 12, carinated in the middle, the 

 last whorl bicarinate, with a broad intervening flattened space, 

 a little concave, everywhere spirally striate. Length, 14 mill. 



Bed Sea. 

 Apparent!}' a young shell. 



Section TORCULA, Gray, 1847. 

 T. EXOLETA, Linn. PL 64, figs. 98-1. 



Whorls 16 or It, rudely ridged above and below, the broad 

 intermediate space concavely excavated, and sometimes crossed 

 by thin lamellae, lower rib of body-whorl double ; margin of the 

 aperture sinuated in the middle ; yellowish white, obscurely 

 longitudinally flamed with light chestnut, more conspicuous on 

 the ridges. Length, 2-2*5 inches. 



West Indies. 



The longitudinal septae are frequently wanting. It is T. tor- 

 cularis, Born, and T. obsoleta, Gmel. I regard T. cochlea, Reeve 

 (fig. 100), as a specimen accidentally less closely coiled than 

 usual, so that the paired lower ribs are exhibited on several of the 

 whorls. T. excavata, Sowb. (fig. 1), said to come from Agulhas 

 Bank, So. Africa, is also a synonym. 



T. MONILTFERA, Adams and Reeve. PI. 64, fig. 5. 



Whorls 15, stout, with upper and lower moderate ridges and 

 a slightty concave wide middle space, lower carina doubled in 

 the body-whorl; pinkish white, upper ridge with chestnut spots. 



Length, 1-25 inches. e 



China Sea. 



