Fam. 3, Plate 45 (supplementary). 



Figs. 4 and 5. 

 EOLIS PUSTULATA, Alder and Hancock. 



E. alba, pellucida ; branchiis elongatis, linearibus, obtusis, aurantiacis, albo pustulatis, in seriebus 

 9-10 digestis; tentaculis breviuscusis ; angulis anterioribus pedis rotundatis. 

 Hab. From deep-water, Cullercoats, J. A. 



Body a quarter of an inch long, rather slender, white, very transparent. Dorsal tentacles 

 rather .short, linear, smooth, somewhat obtuse, and blotched with opaque white at the apex. 

 Oral tentacles scarcely so long as the dorsal pair, tipped with opaque white. From the 

 transparency of the skin, the large corneous jaws appear between the oral and dorsal 

 tentacles in the shape of two oblong brown patches united in front. Branchice rather long, 

 linear, obtusely rounded at the apex • the central gland is of a yellowish-orange colour, and 

 the surface is covered with minute opaque white pustules or granules, which appear to be 

 imbedded in the skin : these are only visible with a lens. The front of the papillae is also 

 marked with irregular linear blotches of opaque white. They are disposed in nine or ten 

 close-set rows of five or six each, not diminishing posteriorly in the usual manner: the 

 papillae of the last row extend considerably beyond the tail. Foot nearly linear, with the 

 anterior angles rounded and the tail very little produced. 



We obtained two individuals of this curious Folis on some small corallines brought in by 

 the fishing boats at Cullercoats, in the autumn of 1853. The granular character of the 

 papillae distinguishes it from any other British species. These organs are capable of great 

 extension, and the animal has the power of bending them at right angles. They are usuallv 

 held in a curved direction, inclining backwards and upwards. They exude a great quantity of 

 mucus, and are covered with very long vibratile cilia. Probably the pustules giving the 

 peculiar granular appearance to the papillae may be mucus-cells. 



Fig. 4. Eolis pustulata, side view. 



5. Two of the branchial papillae, much enlarged. 



Plate 45 also contains the following figures of Parasites. 



Fig. 6. Back view of a parasite from Doris pilosa, supposed female. 



7. Under side of the same. 



8. Back view of a parasite from D. pilosa, supposed male. 



9. Under side of the head of the same. 



10. Dorsal view of a parasite from D. tuber culata. 



