388 AUSTRALIAN FREE-LIVING MARINE NEMATODES, 



the same time transversely annulatecl, the annules being easily 

 seen with moderate powers. The body bears short hairs; on the 

 neck, not far behind the lateral organs, I observed two opposite 

 rows of pectoral hairs, consisting each of four equidistant hairs so 

 arranged that the whole row was two-thirds as long as the 

 diameter of the adjacent part of the neck. These hairs remind 

 one of the similar hairs occuiTing on the neck of Anticoma, and 

 when taken in conjunction with other points of resemblance, 

 suggest a not distant relationship between Cvmesoma and Anti- 

 coma; it should be observed that the pectoral hairs are here not 

 of so pronounced a character as in Anticoma. The conoid neck 

 becomes convex-conoid anteriorly and ends in a truncate head, 

 bearing, opposite the base of the pharynx, a circle of ten spread- 

 ing cephalic setse arranged in the usual mannpr; these setse on 

 the whole are as long as the head is wide, but one of each of the 

 four submedian pairs has only half that length. The lips are con- 

 fluent and obscure, and bear no prominent papilla?; the pharynx 

 is simple, cyathiform, two-fifths as wide as the head, as deep as 

 wide, and contains at its base a small and weak dorsal tooth 

 pointing inward and forwai'd after the manner of the similar 

 tooth found in the throat of Chroinadora, Cyatholaimiifi and 

 related genera. Of the two spiral lateral organs Avhich occur just 

 behind the pharynx and are two-thirds as wide as the neck, the 

 right is a left-handed spiral of about two winds, while the left is 

 a similar right-handed spiral. In its anterior part the oesophagus 

 is one-half as wide as the neck; in the posterior part, however, it 

 becomes two-thirds as wide as the neck, this part being 

 almost entitled to be called a bulb. The lining of the cesophagus 

 is distinctly to be seen when the organ is viewed in optical 

 section. The intestine, which is four fifths as wide as the body 

 and is separated from the oesophagus by a shallow but distinct 

 cardiac constriction, is composed of cells whose granules are so 

 arranged as to give rise to an obscure tessellation. The rectum is 

 as long as the anal body-diameter. The ventral gland is con- 

 spicuous, being situated behind the cardiac collum, and emptying, 

 by means of a wide duct and large ellipsoidal ampulla one-third 



