ON THE ANGUILLULIDA. 165 
6. C. GRACILIS. 
Enoplus gracilis, Eberth, Unters. über Nemat. p. 34, tab. ii. figs. 13-19. 
« Körper in der Mitte leicht angeschwollen, Vorderende verschmälert, Kopf abgerundet, 
leicht vom übrigen Körper abgeschnürt. Hinterende beider Geschlechter zugespitzt 
und gegen den Bauch eingebogen. Der Schwanz in einen kleinen durchbohrten zier- 
lichen Fortsatz ausgezogen . . . . .. 
“Länge des Weibchens 3; Mm., Breite 0:15 Mm. 
“Länge des Männchens 2 Mm., Breite 0-1 Mm. 
“Oesophaguslänge verhält sich zur Körperlänge wie 1 : 6.” 
I have placed this animal in the genus Cyatholaimus, because it seems more nearly 
allied to the representatives of this type than to any others that I have met with. It is 
most certainly not an Ænoplus, and will hereafter, I suspect, be found to belong to a 
genus distinct from, though closely allied to, the one in which I have now temporarily 
located it. 
29. SPILIPHERA , Bastian. 
Gex. CHAR. Body tapering at extremities, conical posteriorly. Caudal sucker elongated, 
cylindrical; sucker-tubes undeveloped. Integument having transverse rows of dots 
or striæ, and two longitudinal rows of dots close together in each lateral region, as 
well as a spiral cervical marking on each side, close to the head ; cephalic setæ mostly 
present; no papillæ. Pharyngeal cavity cup-shaped, having longitudinal rays or 
rib-like markings and three horny apophyses spreading from its base. Gsophagus fre- 
quently enlarged behind pharynx, and generally terminating in an ovoid swelling. 
Intestine mostly pretty well covered with large, coloured hepatic particles. Vulva 
about middle of body. Uterus bifid; segments symmetrical. Spicules curved, 
narrow. Accessory pieces two, somewhat ovate, indistinct. Ocelli absent. Anal 
glands three, sometimes absent. Evcretory ventral gland opening near middle of 
esophagus. Lateral canals . . . . . . 
Movements moderately active. | 
1.8. ELEGANS, n.sp. (Plate XIII. figs. 221, 222.) 
Male, length 75”, breadth 15”. 
External Characters.—Body tapering most at posterior extremity. Head bluntly 
rounded, provided with 2-4 minute setæ, directed forwards. Integument having trans- 
Verse rows (73155 apart) of minute rectangular dots, and two longitudinal rows of larger 
ones, 5550 apart, on each side of body. 
Pharyngeal cavity somewhat infundibuliform, sogo deep; three curved equal-sized 
apophyses extending backwards into substance of @sophagus, sass” in length. (so- 
phagus bth of total length ;: swollen opposite apophyses, and again very distinetly at 
termination. Intestine covered irregularly with large-sized, greenish-yellow eus 
Particles, Anus zly” from posterior extremity. Spicules narrow, slightly curved, 424 
* exidos, a spot, and gépw, to bear, in reference to the integumental markings. 
