Coss—Vematodes, mostly Austrahan and Fijian. 291 
what behind the anterior end of the pre-rectal portion of the intestine. Oblique 
copulatory lateral muscles occur, co-extensive with the pre-rectum. The elongated 
acute spicula are bent at the middle ; their length is one and one-third times that of 
the anal body-diameter. Figured on PI. x1. 
Hab.—Somewhat rare about the roots of banana plants in Fiji, July, 1891. 
4° 6 24 49° 98-4 . . 
2. D. obtusus, n.sp. ¢-3-—a7-g5 79 12mm. The transparent cuticle of this rather 
striking species is finely striated. The slightly convex-conoid neck terminates in a 
somewhat truncate head with six inconspicuous lips each bearing two papille in the 
usual position. The anterior part of the cesophagus is one-third as wide as the 
corresponding part of the neck and ends in a well developed spear; the posterior part, 
beginning suddenly somewhat in front of the middle, is fully twice as wide as the 
anterior part. The cardiac collum is distinct but not deep. The intestine is about 
two-thirds as wide as the body and the contents of its component cells are sometimes 
so arranged as to give it an irregularly segmented appearance. The rectum is about 
three-fourths as long as the anal body-diameter, while the pre-rectal portion of the 
intestine is from three to four times as long as the rectum. The tail is short and 
rounded, the cuticula being slightly thicker in the terminal part. Figured on PI. xt. 
Hab.—Common about the roots of banana plants, in Fiji, July, 1891. Notwith- 
standing careful search, no males were found. The females did not seem very active. 
> 7 248 
. : 4 62 37° ‘48° 99° o 
3. D. longicollis, n.sp. ¢s2-3¢- se 29mm. No markings were observed on 
the smooth and rather thick transparent cuticula. The neck is conoid and ends in a 
rounded head composed of two parts of about equal length, of which the anterior 
is much the narrower, and bears six quite rudimentary lips. Cephalic papille if 
present must be so inconspicuous as to have escaped careful search. The well 
developed spear is about as long as the head is wide and about one-ninth as wide as 
the head. The sinuous anterior third of the unusually long cesophagus is one-fourth 
as wide as the corresponding part of the neck; at the end of the anterior third the 
cesophagus becomes suddenly muscular and larger, that is to say, one-half as wide as 
the neck, and continues thus to the end where it is separated from the intestine by a 
distinct collum. In young specimens the cesophagus occupies more than half of the 
length of the body. The thin-walled intestine is two-thirds as wide as the body, its 
component cells being of such a size that about twelve side by side make up the 
circumference, and having their granular contents so disposed as to give rise to a 
rather distinct tessellation. The rectum equals the anal body-diameter in length. 
In young worms the pre-rectal portion of the intestine was about twice as long as 
the rectum ; presumably the ratio is no greater in the adults. The lateral fields are 
