76 AUSTRALASIAN ANTARCTIC EXPEDITION. 



At the hinder end, too, I was unsuccessful in detecting anal cirri it is merely 

 covered with the papillae (fig. 84). 



On the body generally, so far as it is possible to make out in the flattened 

 condition, the papillae have the following arrangement : On the ventral surface there 

 are about five longitudinal rows of papillae, somewhat smaller than those that cover 

 the dorsal surface. Many of them are tinged with black, as if a secretion had been 

 affected by the osmic acid. 



Between the successive parapods are two papillae in a longitudinal row. Above 

 them the papillae seem to be arranged roughly in 12-15 rows, judging from the number 

 on the exposed portion of the body I admit there is room for error here. I have figured 

 a short portion of the body wall at about the middle of the animal (fig. 85). Along the 

 dorso-lateral edge the papillae are seen lying close together in a row ; there are no definite 

 " small " and " large " papillae, though they are not all quite of the same size (fig. 86). 

 At any rate the definite alternation, such as occurs in S. parvum (Ehlers (1913), p. 504) 

 and S. minutum (Webster and Benedict) does not exist here. 



From the edge I can trace transverse rows to the parapods, some three or four 

 papillae in each row ; these rows are alternately in line with and between the parapods, 

 and are at about equal distance apart ; those in the parapodial or mid-segmental row 

 are perhaps a little larger than the others, but the difference is not at all well marked 

 Also, those in any row that lie nearer to the parapods are slightly smaller than those 

 more dorsally placed. The successive rows tend to alternate with one another in 

 position, though this does not seem absolutely constant, while here and there amongst 

 the others, are a few distinctly smaller papillae. 



The parapods are rather narrow, truncated cones, carrying one, or occasionally 

 two, of the smaller papillae on the dorsal surface near the base (fig. 86). One of th e 

 lips, the anterior I think, is produced into a rounded process, not unlike a papilla, 

 but its contents are not cut off by cuticle from the underlying material. 



I cannot see any cirri. Each parapod is supported by a single colourless aciculum, 

 the apex of which just reaches the surface, and carries about six long colourless jointed 

 chsetae, the appendix of which is very thin, scarcely hooked terminally, with a thin blade 

 in which I can detect no striations (in Canada balsam). The appendix is not unlike 

 that figured for S. parvum, but is rather shorter (fig. 89). 



In the unstained specimen the pharynx is visible, its chitinous lining being 

 outlined by black. It is wrapped round by a coat of muscle, increasing from each end 

 to a considerable thickness in the middle. It occupies the second and third chaetigerous 

 segments, i.e., its entrance is behind the first bundle, its hinder end a little in front of 

 the fourth bundle of chaetae (fig. 83). 



Around its entrance are some glands, deeply tinted black. The apparatus 

 resembles a " pharynx," such as occurs in various families, rather than a " proventriculus" 

 or " stomach " of the Syllidae. 



