132 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
l’@sophage étroit, long de 0""-15, parmi les oscillaires; 4° un ver long de (mma. 
large de 0™"-02, ayant les baguettes du pharynx longues de 0"*-023, et l'oesophage long 
de 077-08, dans l’intestin du Triton variegatus, etc." 
I have thought it best to give Dujardin's description and remarks concerning this 
species entire. From the great difference between the measurements given of this 
Rhabditis terricola, I think it very probable that Dujardin may not clearly have dis. 
tinguished between two or more different species of this genus; whilst the animals 
referred to in his subsequent remarks, I have little doubt, belong to several totally dis: 
tinct genera. 
6. R. MUCRONATA. | 
Anguillula mucronata, Grube, in Wiegmann's Archiv, 1849, i. 361-365, tab. vii. 11-14 (cum anatom.).— 
Diesing, Syst. Helminth. ii. p. 557. 
“ Extremitate corporis antica lentius attenuata, truncata, bifariam e longitudine 
crenata, postica vix attenuata, fcemina rotundata, mucronata, maris in paleam maxime 
excavatam (costulis sustentam) desinente; cesophago postice bulboso, vulva in medio 
corpore sita. Vivipara. Longit. vix 4”; crassit. vix 4, ." 
“ Hab. In terra humida cum lumbricis servata (Grube). 
MARINE. 
14. SYMPLOCOSTOMA |, Bastian. 
Enoplus, Eberth ; Urolabes, Carter. 
GEN. CHAR. Body tapering at extremities. Caudal sucker well developed. Integument 
plain, or with longitudinal markings ; setæ none (P). Pharyngeal cavity elongated, 
somewhat fiddle-shaped, having a peculiar funnel-shaped body lying along its in- 
ferior aspect, and an appearance of three or more circular lines around the parietes. 
(Esophagus gradually widening posteriorly, not distinctly muscular, embraced in 
some part of middle third by glandular ring. Intestinal cells large, well filled 
with dark-coloured granules; often very irregularly disposed in adult specimens. 
Vulva about middle of body. Uterus bifid; segments symmetrical. Spicules long, 
narrow. Accessory piece wanting. Ocelli present or absent. Glandular system 
well developed, especially at anterior and posterior extremities. Zxeretory ventral 
gland opening near anterior extremity; duct containing a granular fluid, and much 
contracted just before termination. Lateral canals 
Movements active. 
I have temporarily placed in this genus three species, which will, in all probability, 
have to be removed hereafter: the first is S. vivipara, about the exact structure of 
whose pharynx I have not had sufficient opportunity of satisfying myself; and the other 
two, evidently very closely allied, are Enoplus ornatus of Eberth and Urolabes barbata 
of Carter. These would appear not exactly to belong to this genus, but to a type very 
similar. Future observation must decide this point. 
! guumAoxos, complez, and erópa, a mouth. 
e 
