BY WILLIAM A. HASWELL, M.A., B.SC, 741 



hacilUpara it differs, among other points, in the form of the 

 uniceUular glands (bacilliparous glands) of the hypoderm. 

 Another near relative is 8. hyalina, Grube {S. macrocola, Maren- 

 zeller) which, however, wants the very characteristic colouration 

 and markings. 



There is also some resemblance to 8. hexagonifera of Claparede 

 ("Glanures," p. 73, pi. V., fig. 2), but, besides the differences in the 

 markings, the present species has the palpi much shorter and 

 stouter as well as more divergent, the cirri relatively thicker, the 

 eyes larger and closer together, and the head broader in proportion 

 to its length. 



SyLLIS TiENLEFORMIS. N. Sp. 



Plate L., figs. 4 and 5. 



The body of this species is long and flattened into the form of a 

 ribbon ; there are extremely long filiform cirri. The colour is 

 light red, with numerous narrow transverse brown bands, and 

 there are narrow bands of the same colour between the joints of 

 the cirri and tentacles. The head is as long as broad, bilobed 

 behind, with a nearly straight anteiior border, and with the antero- 

 lateral angles rather prominent. There are four large eyes ; the 

 anterior pair are circular, and placed close to the antero-lateral 

 angles of the head ; the posterior pair are reniform in outline, 

 slightly larger than the anterior pair, and placed quite close to them 

 and almost directly behind them, but very slightly on their inner 

 side. The palpi are thick, as long as the head, strongly bent out- 

 wards in their ordinary position. The praestomial tentacles are 

 long and very distinctly jointed ; the middle one is four times the 

 length of the head, the lateral one nearly equal to it. The peris- 

 tomial tentacles and the dorsal cirri are similar, much longer than 

 the breadth of the body, strongly ringed. There are two rather 

 shoi't, jointed anal cirri. The -feet are uniramous, with three 

 acicula, and about a dozen compound setse ; the latter have a short 

 blade bifid at the apex. There is a short conical ventral cirrus 

 about equal in length to the parapodia. 



