130 Mr. E. A. Smith on the Marine 



Museum by Mr. Gaskoin are almost 8. This, however, is of 

 little importance, as many of the Trivice exhibit great varia- 

 tion in the size of the specimens. It has been doubted 

 whether the species described originally from Mexico is really 

 the same as that found in the North Atlantic and which is 

 usually considered to be so. Of the identity of the latter with 

 this species there need be no further doubt, for the shells 

 received from Gaskoin, already referred to, are identical with 

 others in the Museum collected by Mr. MacAudrew at 

 Corunna. 



I may add that, although Gaskoin quoted " Mexico " as 

 the locality of his species, the specimens received from him 

 were marked " S. America? " 



Jf'ffreysia atlantlca. (PL XII. fig. 7.) 



Testa minuta, ovato-pyramidalis, auguste perforata, albida, tenuis, 

 diaphana, nitida ; aufractus 4|, perconvexi, sutura profunda, 

 leviter obliqua sejuncti ; apertura ovato-circularis ; peristoma 

 tenue, continuum, margiue columellari vix reflexo. 



Longit. 1| millim., diam. | ; apertura | longa. 



This species is less elongate than J. diaphana of Alder, 

 has a more conical spire, and a shorter and more globose 

 body-whorl ; the aperture also is more circular. 



TelUmya producta. (PI. XII. fig. 2.) 



Testa transversa, insequilateralis, convexa, irregulariter ovato-trian- 

 gularis, postice producta, tenuis, diaphana, nitida, lineis incre- 

 ment] tenuissimis, striisque obsoletis radiantibus sculpta ; marge 

 dorsi utrinque declivis, ventrahs rectus ; latus anticum medio- 

 criter latum, rotundatum, posticum paulo acuminatum ; umbones 

 antemediani, prominentes ; denies duo valvse sinistrse divergentes, 

 subvalidi, v, dextrse inconspicui, marginales. 



Longit. 6| millim., alt. 5, diam. 4. 



This species is peculiar on account of its form, the poste- 

 rior end being produced or subrostrate and the ventral 

 margin straight or even faintly incurved. The hinge-teeth 

 in the left valve are rather distinctly developed and divergent, 

 one on each side beneath the umbo j the right valve is prac- 

 tically edentulous. Below the apex the hinge-line is inter- 

 rupted by a triangular space, the anterior border of which is 

 somewhat thickened, and the dorsal line behind it is narrowly 

 reflexed upward. The pallial line and the adductor scar are 

 very indistinct. 



