CHLAMYDEPHORUS PLECTROPHORUS. 1 7 



Section ISSELIA, Bourguignat. 

 D. SARDOA, Issel. PL 2, figs. 48, 49. 



Somewhat depressed, slightly convex above, narrowly umbili- 

 cated, transversely dilated, thin, shining, straw-colored; spire 

 very small, sublateral, whorls 2J, the last large, elongated, 

 depressed ; aperture widely ovate, very large, the outer margin 

 submembranaceous. Length 4 mill., alt. 1 mill. 



Island of Sardinia. 



The Marchioness Paulucci (Mater, pour servir, etc., 23) calls 

 attention to the resemblance of the figures of this shell to Z>. 

 Sicula, Benoit. She has not seen specimens. 



Genus CHLAMYDEPHORUS, Binney. 

 0. GIBBONSI, Binney. PL 2, fig. 95. 



Animal elongate, slender, cylindrical ; dark orange, thickly 

 marbled with dark olive-brown, except on the middle line of the 

 back and margin of the foot, where the maculations are not so 

 thick and the ground-color more apparent, sole of foot whitish ; 

 a round orifice on the dorsal posterior surface, from which 

 radiate furrows ; ocular tentacles short, retractile ; below the 

 inferior, shorter tentacles are two subpellucid prolongations of 

 the sole of the foot, somewhat resembling a third pair of tentacles ; 

 no jaw ; teeth 27'1'27, the central differing from the others only 

 in being smaller, resembling the dentition of Glandina, the 

 lingual ribbon long and broad, the denticles in about 52 chevron- 

 shaped rows. Length of animal, 3 inches. 



Internal thick shelty plate in fragments, supposed to be hexa- 

 gonal when perfect. Length, 3 mill. 



Natal. 



The type and only known specimen is in the Museum of the 

 Philadelphia Academy. Mr. Gibbons, who collected it, states 

 that when quiescent the head is withdrawn completely, the two 

 margins of the foot are brought together and the tail doubled 

 under. 



Genus PLECTROPHORUS, Ferussac. 



P. ORBIGNII, Ferussac. PL 2, tigs. 96-98. 



This appears to be an imaginary creature, as no specimens have 

 occurred to the malacologists who have so carefully explored the 

 2 



