52 Cobb — Nematodes, mostly Australian and Fijian. 



wide as the head, and the three bulbs at its base form a triple knot three times as 

 wide as the shaft. Anteriorly the oesophagus is one-fourth as wide as the neck ; 

 somewhat behind the middle of the neck it expands to form a muscular prolate bulb 

 one-half as wide as the neck. Thence it passes through the oblique nerve-ring 

 situated just behind the bulb, and from being there one-fifth as wide as the neck it 

 becomes rather suddenly one-half as wide as the neck, and joins the intestine in a 

 rather indefinite manner at 16°/^, as stated in the formula. The ventral excretory 

 pore is situated at a distance behind the median bulb equal to thrice the length of that 

 organ. The intestine is composed of cells containing coarse granules. The distance 

 between the wings of the cuticle equals one-third the width of the body. The tail is 

 conoid to near the terminus, where it diminishes suddenly to a blunt point. I saw 

 only immature females, and cannot give details concerning the sexual organs. The 

 above formula is the average of four specimens. Male unknown. 



Hab. — Observed in numbers in brown rotten cavities three-fourths of an inch 

 deep in the root-stock of banana plants, and also occasionally among the outer 

 sheaths of the plants as well as in the adjacent soil, Fiji, 1891. 



4. T. similis, n.sp. Nearly all the information I have with 



regard to this species is set forth in the sketches on PI. vii. 



Hab. — Found about diseased banana plants, Fiji, July, 1891. 



5. T. multicinctus, n.sp. -^ — 3.5 ; 4.3 2-6 ■*™"- Cuticula traversed by numerous 

 plain transverse striae, which are displayed in the outer as well as the inner layers ; 

 neck conoid; head somewhat rounded and presenting six transparent lips ; spear well 

 developed, stout, and with three prominent bulbs, in action guided by well-developed 

 chitinous processes behind the lips ; anterior part of the oesophagus a chitinous tube ; 

 median sucking-bulb considerably behind the middle of the oesophagus, ellipsoidal and 

 presenting a well developed internal valve ; nerve-ring obHque, close behind the 

 median bulb ; posterior part of the oesophagus at first tubular, but finally expanding 

 into a swelling nearly half as wide as the base of the neck ; intestine granular, two- 

 thirds as wide as the body ; tail convex-conoid, blunt ; nature of the female sexual 

 organs unknown. 2-9 3-4 3-5 ~4- 2-3 ■5°™- Spicula two, equal, elongate, tapering, acute, 

 arcuate, proximal ends not cephalated, one and one-half times as long as the anal 

 body-diameter ; tail completely enveloped in the striated bursa which springs from 

 opposite the proximal ends of the spicula and reaches its greatest development 

 opposite the anus ; accessory pieces half as long as the spicula and placed parallel to 

 them. The worm is weU figured on PL vii. 



Hab.—¥o\nA about the roots of banana plants, Fiji, July, 1891. 



