154) MR. H. CHARLTON BASTIAN'S MONOGRAPH 



"Am unteren Ende des Pharyax liegen auf diessm zwei schonblaue nierenformige 

 Augen. 



" Lange des Weibchens 6 Mm., Breite 0'2 Mm. 



"Ljinge des Miinncliens 4 Mm., Breite 2 Mm. 



" Oesophagusliinge verhalt sicli zur Korpcrlange wie 1 : 5." 



This also cannot belong to the genus JBnoplus. The first glance at Eberth's figures 

 reveals a large pharyngeal cavity with no teeth or jaws, a distinct ccsoi^hageal ring, and 

 an absence of the characteristic supplementary male organ, which at once negative its 

 really belonging to this genus. It seems to be a most remarkable and interesting type, 

 but one with which I am quite unfamiliar. 



18. E. QUADIDENTATTJS, Berlin. 



Miiller's Archiv, 1853, p. 431. — Eberth, Unteisuch. iiber Nemat. p. 31. 



Under this name Berlin appears to have included tAvo or three forms which are per- 

 fectly distinct from one another. From his drawings, one of these animals is un- 

 doubtedly an Mioplus, whilst another appears to be a Leptosomatum. 



19. E. , n. sp., M. Schultze. 



V. Carus, Icones Zootomicfe, pi. vii. fig. 3. 



No description. 



This animal is evidently not an JEnoplus. 



21. LINHOMCEUS ', Bastian. 



Gen. Char. Body linear, cylindrical, scarcely tapering at all at the extremities, which 

 are blunt and rounded. Caudal sucker small, very sliglitly prominent ; sucker- 

 tubes two, short and broad. Integument plain or with longitudinal markings; 

 lateral cervical mark circular, small, with a dot in the centre ; setse more or less 

 abundant in anterior part of body; no cephalic papillae. Pharyngeal cavity of 

 moderate size, cup-shaped, naked. (Esophagus distinctly muscular, swollen slightly 

 behind pharynx and again at termination. Intestinal cells containing rather light- 

 coloured particles more or less tessellate. Vulva about the middle of body, Adth 

 minute eminences (suckers ?) in median line in front and behind it. Uterus bifid, 

 segments symmetrical. Spicules curved, pointed. Accessory x)ieces two, thin 

 and reflexed. Ocelli none. Glandular system parietal, not much developed ; 

 floating cells in general cavity of body large ; anal glands well developed. Excre- 

 tory ventral gland consisting of a broad duct opening near middle of oesophagus, 

 and a terminal dilated portion pressing upon first part of intestine. Lateral canals 

 indistinct. 

 Movements rather slow. 



1. L. HiBSTJTTJS, n. sp. (Plate XII. figs. 178, 179.) 

 Female, length ^", breadth 3^". 

 External Characters. — Body tapering scarcely at all at extremities, but rather more 



' \ivov, a line, and u^oios, like, in allusion to the thread-like nature of the body. 



