14 Cobb — Nematodes, mostly Australian and Fijian. 



a trifle behind the bottom of the pharynx ; each is a spiral one-fourth as wide 

 as the neck, the right being a left-handed spiral of two turns, and the left being a 

 similar right-handed spiral. The pharynx differs somewhat from that of the typical 

 Chromadora as known to me, and this has led me to believe that it will soon be found 

 necessary to re-group the species of this genus, and possibly to create new genera for 

 the reception of some of them. Roughly speaking, the pharynx has the form of a 

 triquetrous pyramid. The dorsal tooth is situated somewhat behind the middle of 

 the pharynx, and when seen in profile appears to be arched over near its apex by a 

 process above it. Opposite the dorsal tooth occurs a ventral projection somewhat 

 resembling a rudimentary tooth inverted. The animal is so very small that these 

 particulars can only be made out with high powers. There are no eyes. The 

 oesophagus is one-half as wide as the neck and ends posteriorly in a spheroidal 

 swelling two-thirds as wide as the neck. The cardiac constriction is very deep and 

 conspicuous. The intestine is two-thirds as wide as the body, and its cells contain 

 granules of various sizes. The conoid rectum somewhat exceeds the anal body- 

 diameter in length. The anus is much depressed. The tail tapers very little, being 

 one-half as wide at the apiculate terminus as at the base. Caudal glands are present. 

 The vulva projects somewhat. Two sketches of this Chromadora are given on 

 PI. II. 



Hab. — Soil about the roots of banana plants, Fiji, July, 1891. 



0. MussB, n.sp. 2-6 3-8 "-6 ? ^2-8 The cuticle has much the same structure as in 

 C. minima. The cylindroid neck is surmounted by a rather truncate head bearing 

 no setae, or such that they escaped observation with very high powers. The 

 spiral lateral organs are placed opposite the middle of the pharynx, each being 

 one-fourth as wide as the head ; the right-hand organ is a left-handed spiral of two 

 turns and the left-hand organ is a similar right-handed spiral. The approach to the 

 pharynx is cyathiform and ribbed as is usual in this genus. The pharynx is somewhat 

 irregularly elongated and the dorsal tooth small and so situated that its blunt apex 

 is somewhat further back than the lateral organs. The oesophagus is slightly 

 expanded to receive the pharynx, but through the greater portion of its length it is 

 only one-third to one-half as wide as the neck ; posteriorly it expands to form a 

 prolate bulb three-fourths as wide as the base of the neck. The nerve-ring is narrow 

 and somewhat oblique. Nothing was seen of the ventral excretory organ or its pore. 

 The intestine is two-thirds as wide as the body. The tail is conoid to the apiculate 

 terminus. Three sketches of this worm, which is of about the same size as C. minima, 

 are given on PL ii. 



Hab. — Found in soil about the roots of banana plants, Fiji, July, 1891. 



