90 



enough to procure species previously undiscovered, and 

 have no doubt that much is still left to reward future in- 

 vestigations. 



The first object to which I will call your attention is a 

 shell of the genus Emarginula, which I supposed to be quite 

 new ; but the particulars with reference to it have been 

 already given by Professor E. Forbes, to whose inspection 

 I submitted it, together with my other acquisitions. I 

 procured three living specimens, but only one of them per- 

 fect ; as the circumstance of its adhering to rocks and large 

 stones in deep water, renders it difficult to procure it in 

 good condition. 



The next is a Pleurotoma, of which I only met with one 

 dead specimen in about forty fathoms water. It is new, as 

 a British species, but differs only in size (being consider- 

 ably larger) from a species discovered by Professor Forbes 

 on the coast of Lycia. He procured two specimens in fifty 

 fathoms, and they have been figured and described by Reeve 

 in his " Conchologia Iconica." Eulima Macandrei I dis- 

 covered in Loch Fyne, in twenty fathoms. Professor 

 Forbes says, withreference to it : — 



" This beautiful little shell differs from all its allies in 

 the narrowness of the number of its whorls. In shape it 

 is elongated, straight and turrited ; the whorls, which are ten 

 or eleven in number, being very narrow in proportion to 

 their length, flat, smooth, polished, and of a subpellucid 

 white ; the aperture is half the length of the body-whorl, 

 broad and somewhat square ; the pillar-lip is quite straight, 

 and forms a marked angle to the mouth. The last whorls 

 is subcarinated. Its nearest ally is the Eulima Scillce 

 of Scacchi, a species found fossil in the pliocene tertiaries 

 of Sicily ; but the living shell has much narrower whorls, 

 judging from the figure of the fossil given in the second 

 volume of Philippi's Enumeratio, t. 24. f. 6. It was 

 dredged in twelve fathoms water in Loch Fyne." 



I shall now offer to your inspection some remarkable 

 specimens of the Terebratula caput-serpentis, a well- 

 known species, though not hitherto described as British. 



