144 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



Pharyngeal cavity indistinct. (Esophagus ^th and ^th of total length, embraced by 

 a ring ; border of posterior half crenated. Intestine well covered with fat-particles, 

 arranged in a tessellate manner. Anus xi^" from posterior extremity. Vulva some- 

 what posterior to middle of body. Ocelli lateral, bright red, situated about ^" from 

 anterior extremity. Parietal glands well developed. Excretory ventral duct 



Male, not seen. 



Sab. Small green sea-weed from tide-pools, Falmouth. 



3. P. TTJBERCULATiTM, Eberth. 



Enoplus iuherculatus, Eberth, Untersuch. uber Nemat. p. 38, tab. iv. figs. 1-5. 



" Korper fast gerade, nach hinten anschwellend, nach vorn sich allmahlich verschma- 

 lernd, mit quer abgestutztem Kopf. Schwanz kurz, wenig spitz, in eine durchbohrte Papille 

 endigend. Das Miinnchen vor Begiun des Schwanzes starker anschwellend 



" Lange des Weibchens 5 Mm., Breite 0'2 Mm. 



" Lange des Miiunchens 4J Mm., Breite 0-125 Mm. 



" Oesophaguslange verhalt sich zur Korperlange wie 1 : 3." 



19. LEPTOSOMATUM ', Bastian. 

 Phanoglene, Eberth ; Enoplus, Eberth. 

 Gbn. 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 ; setae 

 absent, or very few in number ; cephalic papillae wanting. Pharyngeal cavity 

 wanting. Oesophagus not distinctly muscular, almost uniform in size, and sur- 

 rounded anteriorly by an oesophageal ring. Intestine very scantily covered with 

 small light-coloured fat-particles, sometimes almost altogether wanting. Vulva 

 considcraljly posterior to middle of body. Uterus bifid ; segments symmetrical (?). 

 Spicules two, rather broad, but tapering at extremities. Accessory jneces 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. Escretory glands two, lateral, opening on either side close to 

 anterior extremity, and reaching nearly to posterior part of oesophagus. Lateral 



canals 



Movements mostly slow and tardy. 



I feel by no means certain that the animals here placed in this genus aU really belong 

 to the same type, and may not later require a rearrangement. The three species found 

 by me undoul)tedly present certain common characters, the most notable of which are 

 the similarity in tlie 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 L. figuratum have the same double excretory glands as I have un- 



' XeTrros, slender, and irwfia, a body. 



