144 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
Pharyngeal cavity indistinct. Œsophagus 4th and lth of total length, embraced by 
a ring; border of posterior half crenated. Intestine well covered with fat- articles 
arranged in a tessellate manner. Anus 11," from posterior extremity. Vulva some. 
what posterior to middle of body. Ocelli lateral, bright red, situated about vie" from 
anterior extremity. Parietal glands well developed. Excretory ventral duct... . 
Male, not seen. 
Hab. Small green sea-weed from tide-pools, Falmouth. 
9. P. TUBERCULATUM, Eberth. 
Enoplus tuberculatus, Eberth, Untersuch. uber Nemat. p. 38, tab. iv. figs. 1-5. 
* Körper fast gerade, nach hinten anschwellend, nach vorn sich allmählich verschmi- 
lernd, mit quer abgestutztem Kopf. Schwanz kurz, wenig spitz, in eine durchbohrte Papille 
endigend. Das Männchen vor Beginn des Schwanzes stärker anschwellend ....,, 
“ Länge des Weibchens 5 Mm., Breite 0:2 Mm. 
“ Länge des Männchens 44 Mm., Breite 0:195 Mm. 
“ Oesophaguslünge verhält sich zur Körperlänge wie 1 : 3." 
19. LEPTOSOMATUM !, Bastian. 
Phanoglene, Eberth ; Enoplus, Eberth. 
GEN. CHAR. Body elongated, filiform ; posterior extremity blunt and rounded. Caudal 
Sucker not prominent, provided with two or three long sucker-tubes. Integument 
plain or with longitudinal markings ; lateral integumental pores well marked; setæ 
absent, or very few in number; cephalie papillæ wanting. Pharyngeal cavity 
wanting. (Esophagus not distin 
ctly muscular, almost uniform in size, and sur- 
rounded anteriorly by an @sophageal ring. Intestine very scantily covered with 
small light-coloured fat-particles, sometimes almost altogether wanting. Vulva 
considerably posterior to middle of body. Uterus bifid; segments symmetrical (?). 
Spicules two, rather broad, but tapering at extremities. Accessory pieces two, pos 
terior, somewhat cuneiform, Supplemental organ occasionally present. Suckers 
also occasionally present in male, above anus. Ocelli two, conical, red, almost 
lateral, having occasionally a transparent lens-shaped body imbedded in their sub- 
stance anteriorly. Excretory glands two, lateral, opening on either side close to 
anterior extremity, and reaching nearly to posterior part of cesophagus. Lateral 
canals 
bia, OUR UNE ON 
Movements mostly slow and tardy. 
I feel by no means certain that the animals here placed in this genus all really belong 
to the same type, and ma 
y not later require a rearrangement. The three species found 
by = undoubtedly present certain common characters, the most notable of which are 
the similarity in the Shape of the male spicules and accessory pieces, as well ‘as in the 
nature of the ocelli; but I have unfortunately been unable to ascertain whether Zepto 
somatum gracile and r, Jiguratum have the same double excretory glands as I have ul 
* Xerrós, slender, and "uo, a body. 
