Fam. 3, Plate 11. 



EOLIS GLAUCA, Alder and Hancock. 



E. sub-depressa, elongata, rufescens : branchiis vermicularibus sub-conicis, sub-compressis, glaucis, 

 fusco et albo punctatis ; in seriebus 14 dense digestis : tentaculis sub-linearibus, lsevibus : angulis 

 anterioribus pedis paululum expansis. 



Eolis glauca, Aid. and Hanc., in Ann. Nat. Hist. v. 16, p. 314. 



Hab. Dredged off Berry Head, in Torbay. 



Bodij upwards of an inch and three quarters long, rather depressed and elongated, 

 tapering to a fine point behind ; pale red, more intense towards the head. Dorsal tentacles 

 approximating at the base, and spreading above, moderately long, rather slender and tapering, 

 smooth, of a full red, the tips whitish and obtuse. The eyes are small, and placed close behind 

 them. Oral tentacles set rather wide apart, and about the same length as the dorsal pair, 

 their bases forming the sides of the head ; white with a reddish tinge on the upper part 

 especially towards the base, and minutely speckled with opake red. Branchice very 

 numerous, rather stout, slightly depressed, vermicular, and tapering a good deal towards the 

 top ; of a pale sage-green colour, speckled with brown and opake hoary white, and 

 frequently with a reddish tinge near the apex ; the extreme tips pale. They extend forwards 

 round the base of the dorsal tentacles, and are arranged in about fourteen transverse rows 

 down the sides of the back, leaving a bare space in the middle for about half way down. The 

 anterior rows contain ten or twelve papillae each, and as they approach the foot, each of these 

 rows is subdivided into two or three, forming a close series of papillae on the lower part of the 

 body : above there is a short space intervening between each row. The posterior rows are 

 set in close single series to near the tail, which extends a short way behind them, and is 

 generally produced into a fine linear point. Foot pale, slightly tinted with yellow, the spawn 

 appearing of a flesh colour through the centre : it is broadish, arched in front, slit transversely, 

 and extended at the sides into tentacular points. 



A single specimen of this fine species was procured by the dredge off Berry 

 Head, in Torbay, in the summer of 1845. It lived with us some time, and showed but little 

 activity. 



Eolis glauca is perfectly distinct from any other species we are acquainted with, and, 

 with the exception of E. papillosa, is the largest of the British Eolides. It is at once dis- 

 tinguished from E. papillosa by its more slender form, and the clustering of the anterior 

 branchiae, but more especially by the curious vermicular form of these appendages," which are 

 capable of a considerable degree of motion in an undulating manner. 



