256 DR. A. WILLEY ON LITTOEAL POLTCH/ETA 



I am greatly indebted to Prof. F. Jeffrey Bell for his kindness in looking over the 

 proofs of this paper. 



1. EuPHROSTNE CAPENSis, Kinberg. (Plate 13. figs. 1-3.) 



Euphrosyne capensis, Kinberg, 1857, 6fv. Ak. Forh. Stockholm, 1858, p. 14; Grube, 1867, 'Novara' 

 Exped , Anneljden, ]). 6 ; Mcintosh, 1885, ' Challenger ' Polychaeta, Rejiorts, vol. xii. part 3 1, 

 p. 1 ; Marenzeller, 1888, Polychiiteu der Angra Pequena-Bucht, p. 1. 



Euphrosyne polybranchia, Schmarda, 1861, Neue wirbellose Thiere, ii. p. 136. 



Tlie identity of Sehmarda's species with Kinberg's E. capensis was first established by 

 Prof. Mcintosh. 



The collection contains seven examples taken "between tide-marks among rocks, 

 St. James, False Bay," and " among roots of sea-bamboo off Woodstock and Salt Biver 

 beaches." The colour of the living worms is stated to have been brick-red. 



The largest specimen has 64 segments, a length of 64 mm., and width of 15 mm. 

 Others with 54 segments measured 20-22 mm. in length, and one with 52 segments 

 measured 465 mm. in length, showing that there is no fixed correlation between the 

 total length and the number of segments. 



The anterior pair of eyes is placed upon the ventral side of the head (fig. 1), and on 

 either side of them there is a minute parophthalmic tentacle which has not hitherto 

 been described. With strong reflected light they are easily seen under a low power, 

 more clearly in some specimens than in others (fig. 2). 



The cephalic caruncle occujoies the median dorsal area of the first seven segments 

 (fig. 3). 



2. Lepidonotus clava semitectus, Stimpson. (Plate 13. fig. 4.) 



Lepidonolus semitectus, Stimpson, " New Marine Invertebrates," Proc. Acad. Philad. vii. 1855, p. 393 ; 

 Marenzeller, 1888, Polychliten der Angra Pequena-Bucht, p. 3. 



The very numerous examples of this species contained in the collection present a 

 varying aspect, differing in colour from mottled dark brown or black to mottled scarlet 

 on the elvtra. They represent the Cape community of the Mediterranean and British 

 species, Lepidonotus clava (Montagu). Tlie remaining synonymy is given by Maren- 

 zeller. The above trinomial designation of the species requires some explanation. It 

 seems there is no real specific distinction between the Cape and the northern forms. 

 The worms in this collection are topotypes of Stimpson's L. semitectus, and the word 

 semitectus is merely employed here to denote this fact. Their colour-mean, average 

 dimensions, and periodicity probably diverge more or less from those of the nortliern 

 members of the species. If Stimpson had employed a geographical epithet for the 

 trivial name of his specimens, it would have better suited our purjiose, because the 

 typical L. clava is also " semitectus " in respect of the elytra ; but as he did not, I retain 

 liis term with the view of recognizing his rights and avoiding a controversy concerning 

 priority. 



The opposed scales sometimes touch in the middle line, leaving uncovered diamond- 



