Coss—Vematodes, mostly Australian and Fijian. 257 
Anus at 96 ¥ to 87 7. 
Worm about 1: mm. long. 

Pharynx thrice as long as wide.................0.0+ 7. parvus. 
Pharynx twice as long as wide................0+.8 8. cristatus. 
Pharynx about as long as wide.................. 06+ 9. minor. 
Worm about 1:8 mm. long. 
Pharynx narrow, twice as long as wide........ ..» 10. papillatus. 
Pharynx about as wide as long........ ....s.eeeee 11. muscorum. 
NYormipaboubra mis] on cwnsssasneremsteersceee ties ceesees) LQ mnagor 
Tail in the posterior part cylindroid. 
Anus at 827%; pharynx less than three times as wide aslong 13. longicaudatus. 
Anus at 867% ; pharynx four times as wide as long.......... 14. truncatus. 
: 15. macrostoma. 
Anus situated at length at not less than 90 7%... ........405 { 
16. fovearum. 
2.0 9 R  iupl2 
At 3°3 8°22 25°6 ‘70 92° s 
1. M. digiturus, n.sp.  33-3-—ya— gag 4mm. The truncate head is only very 
slightly expanded. Each lateral field appears to end in a curve opposite the anterior 
part of the pharynx, and I surmise that these curves are the lateral organs. The 

pharynx, which is as long as the head is wide and two-thirds as wide as long, is entered 
through a vestibule one-fifth as long as the pharynx proper ; three longitudinal 
chitinous ribs occur at the angles of the internal surface of the pharynx and near their 
bases are seen three subequal rather rudimentary basal teeth, of nearly equal size, only 
one-third as long as the cavity. The cesophagus is about three-fifths as wide as the 
neck, being in the middle somewhat narrower than elsewhere ; it is separated from the 
intestine by a distinct constriction. The gut is three-fourths as wide as the body and 
ends in a rectum a trifle longer than the anal body-diameter. A ventral pore occurs 
just behind the nerve-ring. The tail is areuate-conoid to the somewhat blunt terminus. 
This and the next are the only known species in which the female sexual organs are 
not double and symmetrical, and as usual it is the posterior branch which has 
disappeared ; the remaining anterior branch is short and reflexed. ,The vulva is not 
prominent. Drawings are given on Pl. xxxvi. 
This worm was found in small numbers about the roots of banana plants, Fiji, 
July, 1891. No males were seen. 

2. M. gymnolaimus, n.sp. 33-33-97 es “7 20mm. The neck of this species is 
eylindroid. The diameter of the inner circle of cephalic papillze is half that of the 
outer circle. The vestibule is one-fourth as long as the pharynx proper. Opposite 
the anterior part of the pharynx, near what appears to be the termination of the 
lateral fields, occur small transverse elliptical markings, probably representing the 
lateral organs. The strongly three-ribbed triquetrous pharynx is as long as the head 
is wide, and one-half as wide as long, and presents a single rudimentary dorsal tooth 
at the base. The transverse striz on the wall of the pharynx near the middle are 
eat 
