148 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
others frequent about posterior extremity, especially in the male : cephalic papilla 
often present. Pharyngeal cavity none or indistinct, but in its situation three 
distinct horny jaws or teeth, more or less bilobed at their extremities. Esophagus 
not distinctly muscular, nearly uniform in size, often much stained with pigment, 
especially at the anterior part; no distinct œsophageal ring. Intestine well covered 
with dark pigment-granules often distinctly tessellate in arrangement, Vulta 
about middle of body. Uterus bifid; segments symmetrical. Spicules large, 
curved, and, together with two strong lateral accessory pieces, of a yellowish-brown 
colour. Supplemental organ of same colour, large, oblique, funnel-shaped. Oeelli 
(pseud.) occasional, owing to more distinct aggregation of the usual pigment-matter 
of esophagus; sometimes on or external to cesophageal sheath (?). Excretory 
ventral gland tubular, opening about the termination of anterior third of cesophagus, 
Lateral canals distinctly cellular. 
Movements moderately active. 
This is a very interesting genus, inasmuch as it appears to reveal to us the most rudi- 
mentary condition of the ocelli, which are found more specially developed in the species 
of other genera, such as Phanoderma and Leptosomatum. Here we find, in several 
species, a simple local increase in the aggregation of the pigment, in two or three patches, 
on the anterior part of the cesophagus, it being also more or less scattered over its whole 
extent, whilst in Ænoplus inermis it is wanting in all parts of the cesophagus, save in 
two rather distinetly defined ocelli-like masses, which seem, however, to be still situated 
beneath instead of on the sheath of the cesophagus, as is so evidently their situation in 
the genera above named. 
In this genus also are included many species of free Nematodes which have been dis- 
covered by other observers, but whose real position and nature are still very doubtful, 
either from the insufficient or unsatisfactory nature of the details concerning them. 
l. E. communis, n. sp. (Plate XII. figs. 164-166.) 
Female, length 1", breadth 130 : 
External Characters.—Body tapering slightly forwards, but considerably behind, 
where it terminates in a rather long pointed extremity, with a rounded sucker and three 
small divergent setze, Head rounded, narrowed, provided with four crucially arranged 
papillze, and behind them a circlet of 8-10 long patent setze; a few small setze scattered 
over anterior part of body also. Integument with almost imperceptible transverse stri®, 
about 35455 apart, and with an appearance of longitudinal markings also at a dis 
tance of 5”. 
Pharynz indistinct. Teeth three, equal-sized, of a light fawn-colour, rogo 1008: 
marked with minute longitudinal lines, and having their upper extremities somewhat 
bilobed. Esophagus about 1th of total length, having its canal indicated by a sinuous 
line, with irregular transverse markings of its walls at intervals, and a more or less 
abundant arrangement of minute olive-coloured pigment-granules, mostly collected in 
three longitudinal lines, with short irregular transverse offshoots or separate masse, 
most marked anteriorly just behind pharynx. Intestine thickly covered with dark- 
, Coloured fat-particles contained in rather large cells, the tessellated appearance bein? 
