400 Dr. J. Gwyn Jeffreys on Mediterranean Mollusca. 



Aporrhais Serresianus, Michaud. 



Gerithium tuberculatum, L., var. G. reticulatum, Da C. 



Tr if oris perversa , L. 



Murex brandaris, L. M. aciculatus, Lamarck. 



Lachesis minima, Mont. 



Trophon syracusanus, L. T. breviatus, Jeffr. 



Nassa reticulata, L. N. pygmcea, Lam. 



Golumbella scripta, L. C. minor, Sc. 



Defrancia teres, Forb. D. gracilis, Mont. D. Leufroyi, 

 Mich. D. purpurea, Mont., var. 



Pleurotoma Loprestiana, Calc. P. nuperrima, Tiberi. P. 

 nebula, Mont. P. br achy stoma, Ph. P. Stossichiana, 

 Brus. P. clathrata, de Serres. P. rugulosa, Ph. P. es- 

 tate, Don. P. Maravignce, Biv. Besides young and un- 



Pleurotoma. 



Defrancia and 



Mitra ebenusj Lam. 



Marginella secalina, Ph. J/, clandestine,, Brocchi. 



Cyprcea europcea, Mont. 



Hingicula auriculata, Menard. 



Cylichna Jeffreysi, Weink. 



Cylichna parvula*, Jeffreys. (PL XVI. fig. 9.) 



Shell forming a short cylinder, rather solid for its 

 minute size, semitransparent, and glossy : sculpture, nume- 

 rous and very fine wavy lines of growth ; the crown or 

 apex is encircled by a thickened riblet or ridge ; half- 

 grown, and especially young, specimens exhibit a sunken 

 spire of one or two whorls with a globular nucleus : colour 

 clear white : mouth contracted above and in the middle, 



a 



at each end, 



slightly projecting beyond the crown : apex perforated : 

 pillar short, flexuous, notched at the base. L. 0*06, B. 

 003. 



About 100 specimens. 



This is perhaps the type of a distinct genus between 

 Cylichna and Utriculus, which may be called Cryptaxis, 

 because the spire is partly concealed. A little Madeiran 

 shell, discovered by the Eev. Robert Boog Watson, and 

 named by him Utriculus tornatus or U. spretus, somewhat 

 resembles the present species, but is much larger and oval ; 

 and the spire is more visible, although sunken and partly 

 concealed. 



Utriculus globosus, Lov. 

 Bulla striata, Brug. 



* VerysmaU. 



