132 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



I'cBSophage etroit, long de 0°"""15, parmi les oscillaires ; 4" un ver long de 0""°-53, 

 large de O'°'°02, ayant les baguettes du pharynx longues de 0°™-023, et I'oesopliage long 

 de O^^'OS, dans I'intestin du Triton varicgatus, etc." 



I have thought it best to give Dujardiu's description and remarks concerning this 

 species entire. From the great difference between the measurements given of this 

 Hhabditis 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. MUCEONATA. 



AngmUula 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, foemina rotundata, mucronata, maris in paleam maxime 

 excavatam (costulis sustentam) desinente ; asophago postice bulboso, vulva in medio 

 corpore sita. Vivipara. Longit. vix \"' ; crassit. vix -^" " 



" Hub. 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 ; setae none (?). 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. Excretory 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 Enop)lus 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. 



' avfiirXoKos, complex, and tnofia, a mouth. 



