38 eolididjE. 



rally diffused in the seas of northern Europe. On account of 

 its variation in colour and markings, several species have been 

 made out of it. E. Zetlandica of Forbes, E. Lesliana and E. 

 Murray ana of Macgillivray, E. rosea and E. obtusalis of Alder 

 and Hancock, are all now considered to be varieties of E. pa- 

 pulosa. Its spawn may be seen on the underside of stones in 

 the spring and summer months, consisting of a gelatinous 

 pinkish-white cord, much convoluted, and having a beautiful 

 festooned appearance when viewed under water. [Mr. Peach 

 found at Wick a unicorn monstrosity ; it had only a single 

 dorsal tentacle and sheath placed in the middle.] 



2. E. glauca, Alder and Hancock. 



E. glauca, A. & H. in Ann. N. H. 1st ser. xvi. p. 314; Brit. Nud. Moll, 

 fain. 3, pi. 11. 



Body elongated, rather depressed, brick-red : dorsal tentacles 

 moderately long, red, tipped with white : oral tentacles slightly 

 longer than the dorsal, white, with a line of red : branchial 

 processes conical, vermicular, subdepressed, and tapering a 

 good deal towards the tip, glaucous or olivaceous, freckled 

 with brown and white, set in about 14 rows : foot with the 

 anterior angles a little produced. L. 1*75. 



Habitat: Dredged in deepish water in Torbay, and in 

 Menai Straits near Beaumaris (Alder); Falmouth (Cocks). 



E. glauca is readily distinguished from E. papillosa by its 

 more slender form and the vermicular character of the bran- 

 chial processes. The plates of the tongue of this species form 

 a double arch, those of E. papillosa only a single arch. 



3. E. Alde'ri, Cocks. 



E. Alderi, Cocks in the ' Naturalist,' ii. p. 1, pi. 1. f. 1. ; A. & H. Brit. Nud. 

 Moll. fani. 3, pi. 10. f. 5, 6. 



Body elongated, white or greyish : dorsal tentacles mode- 

 rately long, bright yellow : oral tentacles slightly longer than 

 the dorsal pair, white, tipped with yellow : branchial processes 

 slightly conical, set in 12 to 14 dense rows nearly covering 

 the back ; the first two or three rows opaque white, the re- 

 mainder greyish with a pale brownish freckling, and yellow 



