BY WILLIAM A. HASWELL, M.A., B.SC. 735 



extent of the ciri-us exliibits no joints. The parapodia are well 

 developed, bilobed, the ventral lobe the broader, with about fifteen 

 compound seta), the dorsal lobe with six to eight stout, simple acicula. 

 The ventral cirri are leaf-like and short, scarcely I'eaching as far as 

 the exti-emity of the parapodia. The compound setas are not dis- 

 tinguishable from those of aS'. Schviardiana described below. The 

 anal cirri are rather stouter than the dorsal cirri immediately 

 preceding them, as long as the last seven or eight segments, 

 tipped with a small brown mark. 



There is a single triangular tooth. The oesophagus in the 

 retracted condition extends to the twelfth segment, the gizzard to 

 the sixteentli. 



This beautiful annelid is not uncommon in the littoral zone in 

 Port Jackson, and is brought up very frequently in the dredge 

 from various depths (up to 15 fathoms). 



There are a good many points of resemblance between this 

 species and Syllis solida, Grube, from the Phillipines : but in the 

 latter species the palpi are relatively short, while the dorsal 

 cirri are relatively long, and the transverse lines on the dorsal 

 su.rface are apparently absent. 



Characteristic of the hypoderm in this species (Plate LV., fig. 5) 

 is the presence of innumerable multitudes of unicellular glands 

 of flask-like form, with more or less prolonged necks, which 

 pierce the cuticle to open by a minute pore on the exterior. 

 Most of these glands are full of granular matter, which becomes' 

 intensely stained with hsematoxylin ; some of them, however, 

 are occupied by an open reticulum. The ordinary hypoderm 

 cells are arranged in an outer layer of vertically-elongated cells, 

 the outer ends of which are broad, while the inner ends are 

 drawn out into fine threads, and an inner layer of fibre-like 

 cells which form a network of fine threads with nuclei and 

 pigment granules. 



The longitudinal muscular fibres of the body-wall form an 

 almost continuous layer, interrupted only along the bases of the 

 parapodia and along the line of the ventral nerve cord. 



