288 Macteay Memoria Vo.ume. 
near the truncate head. Half-way between the anterior extremity and the lateral 
organs occur six cephalic sete, each one-third as long as the head is wide. The 
obscure lips are probably three in number. The lateral organs are unclosed circum- 
ferences, one-fourth as wide as the head, and are situated opposite the middle of the 
pharynx; regarded as spirals, the right is a left-handed spiral, and the left a right- 
handed spiral. The long two-chambered pharynx reaches half-way to the nerve-ring, 
only the anterior part being referred to in the above formula: the anterior half is a 
strongly-lined tube, wider at the mouth, namely, one-third as wide as the head; 
the posterior half somewhat resembles the remainder of the cesophageal tube. This 
latter is anteriorly one-third as wide as the neck, but posteriorly narrows to one-fourth 
as wide as the neck, and finally expands to form an elongated bulb three-fourths as 
wide as the base of the neck and containing a distinct valve. The transparent 
intestine, which is two-thirds as wide as the body and rather thin-walled, is separated 
from the cesophagus by a distinct constriction. The ventral excretory pore is 
situated opposite the oblique nerve-ring. The two wings of the cuticle found on 
each side of the body are separated from each other by a distance equal to one- 
seventh the diameter of the body. The tail is conoid and ends in an apiculate 
terminus one-third as wide as the anal body-diameter is long. Caudal glands as in 
other Plectz. The vulva is inconspicuous. The eggs are three-fourths as wide as 
the body and five times as long as wide; only one seen and that behind the vulva, 
unsegmented. The female sexual apparatus is possibly single and reflexed, extending 
first forward and then back past the vulva. 
FTab.—About the roots of plants, Moss Vale, New South Wales, Australia. 
Genus CEPHALOBUS, Bastian. 
1. C. similis, n.sp. Very likely a new genus may have to be created to 
receive this interesting little worm, which I found on lettuce from a Chinaman’s 
garden. The only specimen seen, a young female, gave the following dimensions : 
ao eg mm. Neck conoid; head truncate, bearing six large bluntly conical 
lips; pharynx deep and complicated, composed of three parts as follows: 1, the part 
alluded to in the formula as 1°6 °/, deep, one-third as wide as the head, fully twice 
as deep as wide, tapering behind into 2, which is closed and surrounded with a 

separate muscular layer, but which however has not so great a diameter as 3, which 
is nearly twice as long as the two anterior parts taken together, more than half as 
wide as the corresponding part of the neck and contains a narrow elongated cavity 
in its anterior half; cesophagus of three parts, with the pharynx forming a structure 
of the same form as the esophagus of Ahaddt/zs, 7.e., the anterior three-fifths about 
half as wide as the neck and connected with the rather weak ellipsoidal cardiac bulb 
