184 Mr. J. G. Jeffreys on the Marine Testacea 



ulvse, B. M.).— R. cingiUus, B. M. -R. rubra, B. M. (R. fulva. Ph.) ; 

 var. unifasciata. — R. ? littorea, B.M. (Truncatella littorina, Ph.). 



Rissoina Bruguieri, D'Orb. (Rissoa Bruguieri, Ph.), R. decussata. 

 Nice. — R. Chesnelii, Mich. Nice. — R. maryinata, Mich. Nice. 



Jeffrey sia diaphana, B.M. 



Jeffrey sia cyUndrica, n. s. Pi. II. f. 8, 9. 



Testa longo-cyhndrica, ad apicem obtusa, hyahna ; anfractibus 4, 

 brevissimis, nitidis, ultimo reliquos superante ; sutura distincta ; 

 apertura ovata, subeffusa, f spirse partem sequante, margine sub- 

 connexo ; umbiUco angusto ; long. -^, lat. -^ uncise. 



Of this very minute but peculiar species I took only one speci- 

 men, by dredging in about 12 fathoms at Spezia. It approaches 

 somewhat in form the Chemnitzia Gulsonse of Clark, which I think 

 ought to be referred to the same genus. 



Skenea planorbis, B. M. The Mediterranean specimens, like those 

 from Guernsey, are girdled with a single row of circular reddish- 

 brown spots. — S. nitidissima, B. M. (Truncatella atomus. Ph.). — S. 

 rota, B. M. Mediterranean specimens are girdled with three bands 

 of reddish-brown, one on the outer edge or periphery, and the others 

 on the upper and under side of each whorl ; which, with the striae, 

 render them exquisitely beautiful objects. — S. exilissima (Delphinula 

 exilissima. Ph.). 



Turritella communis. Ph. ^ B. M. — T. triplicata. Ph. 



Turritella? pusilla, n. s. PI. II. f. 10, 11. 



Testa turrita, lutea vel fusca, solidula ; anft-actibus 12, convexiuscu- 

 lis, iriterdura varicosis, plicis 8 longitudinalibus (quarum 3 mediae 

 prominentiores) costellisque transversis (in ultimo anfractu 8, in 

 penultimo 5) decussatis, in superioribus anfractibus nodulis effor- 

 matis ; sutura profunda ; apertura ovato-rhomboidea, subeffusa, 

 sextam spirse partem sequante ; long, i, lat. ^^g^ unciae. 



In about twelve fathoms. Gulf of Spezia ; not common. It has 

 somewhat the habit of a Cerithium, but differs in its shorter spire, 

 and, above all, in the form of its aperture. 



Caecum trachea, B.M. (Odontidium rugulosum. Ph.). — C.glabrum, 

 B.M. 



Aporrhais pes-pelicani, B. M. (Chenopus pes-pelicani. Ph.). — A. 

 desciscens (Chen, desciscens. Ph.). 



Cerithium vulgatum. Ph. — C.fuscatum,PA. ; var. minor. — C. mam- 

 millatum. Ph. — C. reticulatum, B. M. (C. lima. Ph.) ; var. major ; 

 var. /5. Ph. — C. angustissimum, Forbes (Report on ^gean Inverte- 

 brata, 1843). — C. adversum, B. M. (C. perversum, Ph.). 



Scalaria communis, Ph. ^B. M. — S. Turtonis (S. tenuicosta, Ph.). 

 — S. pseudosfalai'iSy Ph. — S. pulchella. Ph. 



Vermetus semisurrectus, Ph. — V. subcancellatus. Ph. — V. gigas, 

 Ph.— V. glomeratus. Ph. 



Siliquaria anguina, Ph. Nice. 



