Cossp—Nematodes, mostly Australian and Fijian. 281 
bulb-like structure—pseudo-bulb. .. The. rectum.is short, seldom exceeding in length 
the anal body-diameter. Little is known concerning the ventral excretory gland ; 
traces of it have been observed in but one species. In this respect, as well as in 
many others, this genus resembles J/onhystera. The nerve-ring encircles the 
cesophagus squarely some distance in front of the middle of the neck. The tail has 
the same shape in both sexes, namely,..conoid. from the inconspicuous. anus; the 
terminus, which is invariably a trifle-swollen and--often mucronate, gives exit to the 
secretions of the caudal glands,—always present. The female sexual organs are 
commonly double and symmetrically reflexed. What little evidence there is points 
toward the number of testicles being two (—M—). A ventral row of equidistant 
accessory sexual organs occurs on the male and extends forward from the anus 
sometimes to near the head. The two equal cuneiform spicula are straight or 
slightly curved and seldom.exceed the anal body-diameter in length ; they are 
accompanied by small.accessory. pieces. There is no bursa. Probably only a 
discovery of the males of the species sonkystera (and possibly also of avenzcola) can 
determine whether that species is really a member of this genus. 
Key to Tripy3a. 
Cephalic setze none, 7.e., reduced to papille. 
Length about 3: mm., head rounded. 
SIME Copa® LTGCl Cards fORCWOS > oarccn ac aonodosodbescas25005 coon Suds noc HsnsobonoubaSsodusaed 1. salsa. 
SeLiaMine ade COUNPICHOUS meseedaensscesceese sens eee aeeicedens ce Ga taeoearcs se 3600550 2. papillata. 
Length 1:4 mm. to 2°5 mm., head truncate. 
When 1:4 mm. long read 3. affinis. 
Wihent2; Orman son Caren creceret sarees saci as pemeceleseeebe cise eeaseats selciep nce snisis\s 4. glomerans. 
Cephalic setze present, not reduced to papille. 

Female sexual organs asymmetrical. 
Vulva 64%, tail 5 %peccssecececscseeee Copter RestMae afte) SU) sth AW al U8 { 2 earl: 
6. minor. 
WorlivaniOiye taili Oy fo cnactece sc secs es SSAC ACO E CE ESO COTE Marea cnE mrCOS CBAC asleeatechette 7. monhystera. 
Female sexual organs symmetrical. ey, 
abitat: MAINE. /csccerescess sec cecenseeseceses FE ESE Oa ACAD C ercrantormnarnasace ccs 8. marina. 
Habitat not marine. 
Cisophagusi2b) /ore.ccccceseseacs sre 30 sngdsbododedocepensdesda coadoouonbostenasvacsnas 9. intermedia. 
Csophagus little, if any, exceeding 20 %. 
Tail occupying about 20 Y of the length, conoid........................... 10, filicaudata. 
Tail occupying about 15 Y/ of the length, conoid........ ......... 2.2.0. 11. setifera. 
Tail occupying about 10 7% of the length, anterior half only conoid... 12. tenuzeauda, 
Key to tHe Mates. 
Spicula shorter than the anal body-diameter. 
Hab itaibimarine semen sr aasicn-ceakes cts aeee Set yseieaaec- sce Fs too 00% sahil este de scpistiniaaanamnss 8. marina. 
Habitatmotimarin@ ares cos: see cessteetecercesocecseveoreseo> = PREC ER ORRIBORE EC CRUE SECAOD 11. ‘setifera. — 
MM wa 
