BY WILLIAM A. HASWELL, M.A., B.SC. 747 



extends as far V)ack as the twelfth segment. The gizzarxl extends 

 to the thirty-first segment : in structure it agrees with the gizzard 

 of Stjllis, but transverse striations were not observed in the 

 radiating muscular fibres. 



This species seems referable to Sohmarda's genus Gnathosyllis 

 ("Neue Wirbellose Thiere," I., ii., 69), but differs from the type 

 species (G. diplodonta) in the form of the jaws, the much sm tiler 

 size of the palpi, and many other points. 



sp. 



II. STAUROCEPHALUS. 



Statjrocephalus australis. N. 

 (Plate LIII, figs. 1-5.) 



The colour is light red. The body is nearly cylindrical, but a 

 little compressed from above downwards There are nearly ninety 

 segments, which are, on an average, eight to ten times as broad as 

 long. The parapodia with their setse are nearly equal in length to 

 half the breadth of the body. The head is prominent, rounded in 

 front ; there are two pair of eyes of which the first pair are much 

 the larger, reniform in outline, and placed far apart from one 

 another towards the lateral borders of the head, while the hinder 

 pair are circular in outline and situated internally to as well as 

 behind the front pair. The superior pair of antennte are attached 

 just inside the larger pair of eyes, they consist of 11-13 joints and 

 are twice the length of the head. The lower pair are slightly 

 shorter, and have a long basal joint and a short oval distal one. 



The parapodia are bilobate; the notopodium is armed with a 

 number of fine, simple, tapering setae, which are finely serrated 

 along one side, and with one or two stouter setse with a peculiar 

 beak-like extremity ; the neuropodium has about twenty compound 

 set£e, with a slender, veiy slightly curved, terminal joint, obscurely 

 notched at the apex and serrated internally. The dorsal cirri 

 extend rather beyond the extremity of the parapodia ; they are 

 two-jointed, the terminal joint being small and pointed. The 

 ventral cirri ai'e very short, not extending beyond the extremity 

 of the parapodia. There are two long anal appendages with a few 

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