Cobb — Nematodes, mostly Aiistralian and Fijian. 47 



rectum nearly twice as long as the anal body-diameter; tail conical and hair-fine at 

 its terminus, without glands ; anus and vulva not conspicuous. Male unknowui 

 Figured on PI. ii. 



Had. — Soil about banana plants, Fiji, July, 1891, common. 



Genus TYLENCHOLAIMUS, de Man. 



T. ensiculiferus, n.sp. "-e ? ^2-9 ^3- ^tt i^^smm. The thick transparent and naked 

 cuticle seems not to be annulated. The neck is cylindroid in the posterior half and 

 convex-conoid in the anterior half. The diameter of the head in the lip-region is 

 equal to "8 per cent, of the body-length, i.e., is one-third as wide as the base of the 

 spear. The head, somewhat rounded in front, bears no setse and none but very 

 inconspicuous lips, of which the number is probably three. There are no eyes. No 

 lateral organs were seen. The pharynx, which is half as long and nearly one-third 

 as wide as the neck, contains a spear whose three-bulbed base is one-fourth as wide. as 

 the middle of the neck and whose posterior third is three times thicker than the 

 slender anterior two-thirds. From the base of the spear a narrow and, when the 

 spear is not exserted, tortuous canal leads to the muscular much elongated cardiac 

 bulb, which is twice as long as the neck is wide and fully four times as long as wide. 

 The thick-walled granular intestine is one-half as wide as the body and is separated 

 from the cardiac bulb by a deep and distinct constriction; the rectum is one-half as 

 long as the anal body-diameter. The nature of the ventral gland, longitudinal fields, 

 and nerve-ring remain unknown. The posterior end is rounded and thick-skinned, 

 but its internal muscular matter ends in a blunt point. The male was not seen. 

 Drawings of this interesting worm will be found on PI. vii. 



I/ad. — Found in soil about the roots of banana plants, Fiji, 1891. Not common. 



Genus TYLENCHUS, Bastian. 



Transparent striated round worms, in most cases devoid of bristles or setse, 

 varying in length from one-third of a millimetre to three and a-half milhmetres, 

 attacking the tissues of plants, or more rarely animals, by means of a pharyngeal 

 spear and sucking apparatus of the following construction : a three-bulbed spear, 

 capable of being thrust forth and withdrawn by appropriate muscles, is connected 

 with a powerful median oesophageal sucking-bulb by means of a. tube whose lining is 

 more chitinous than is usual in other Nematode genera ; the median bulb is connected 

 with a smaller posterior bulb of much weaker construction by means of a shorter and 



