xii A MONOGRAPH OF THE 



which are occasionally found on the Elgin coast. Mr. Murray states that the papilla? are 

 generally " coloured externally with an indistinct purple, partaking largely of an umber tint, 

 through which, in some cases, the narrow straw-coloured central vessel is faintly visible. In 

 some the papillae are very dark, the umber predominating over the purple, and in this case, a 

 very marked and striking contrast of colour is caused by the apex being generally whitish, 

 with only a very slight tinge of orange. In others the purple colouring of the body is so faint 

 as to be scarcely perceptible." One or two individuals kindly sent to us in a living state, 

 were of a very delicate violet colour. The orange markings represented in our plate appear 

 to be pretty constant. The Scottish specimens were half an inch in length. 



(33) EOLIS EXIGUA. 



Additional Habitats. Garth Ferry, Bangor, North Wales, J. A. Cullercoats, Northum- 

 berland, A. H. Burghead, Elgin, G. Murray, Esq. 



(34) EOLIS DESPECTA. 



Additional Habitats. Falmouth, W. P. Cocks, Esq. Fowey Harbour ; and Garth Ferry, 

 Bangor, /. A. Burghead^ G. Murray, Esq. In all these instances it was in company with 

 E. exigua. 



(35) Embletonia minuta. 



Eolidia minuta, For. and Goods., in Rep. Brit. Assoc, 1839. Athensemrj, No. 618, p. 647. 

 Embletonia minuta, For. and Hani., Brit. Moll., v. 3, p. 607, pi. bbb, fig. 5. 



Dredged in seven fathoms among Laminaria at Lerwick, Shetland, Professor E. Forbes. 

 The species comes very near to E. pulchra, but judging from the figure it appears to be 

 more slender in all its proportions. 



(36) Embletonia pallida. 



A specimen of this minute species, discovered by Mr. Price, among sea-weeds, on the 

 shore at Birkenhead, was obligingly sent us by that gentleman in the spring of this year 

 (1854). It differs from the other British species in having a double series of papillae on each 

 side ; the tentacles, too, are placed much nearer together, and the oral lobes are small and 

 indistinct, being united over the head in front into a semicircular veil, which, Mr. Price informs 

 us, was in constant motion when the animal was in a lively state. 



(37) Herm^ea, from Ep[xaiov= Lucrum insperatum, Loven, in lit. 



(38) Antiopa hyalina. 



Mr. Byerley has sent us a second specimen of this species, more mature and in better 

 condition than the first, which arrived dead. This differs from the former in the greater 

 length and more pointed character of the dorsal tentacles. The papillae are much attenuated 

 and elongated above, with the point enlarged and obtuse ; the gland is darker and a little 

 branched. The tail, also, is more produced. Length § inch. 



