ON THE ANGUILLULID^. 165 



6. C. GRACILIS. 



Enophis gracilis, Eberth, Unters. iiber Nemat. p. 34, tab. ii. figs. 13-19. 



" Korperva. der Mitte leicht angeschwollen, Vorderende verschmiilert, Kopf abgerundet, 

 leiclit vom iibrigen Korper abgesclmurt. Hinterende beider Geschlechter zugespitzt 

 uud gegen den Bauch eiugebogen. Der Schwanz in eiuen kleinen dui-chbohrten zier- 

 lichen Eortsatz ausgezogen 



" Lange des Weibcbens 3^ Mm., Breite 0'15 Mm. 



" Lfinge des Mannchens 2 Mm., Breite 0"1 Mm. 



" Oesophaguslange verhiilj; sich zur Korperlange wie 1:6." 



I have placed this animal in the genus Cyatholaimus, because it seems more nearly 

 allied to the representatives of this type than to any others that I have met with. It is 

 most certainly not an Mioplus, and will hereafter, I suspect, be found to belong to a 

 genus distinct from, though closely allied to, the one in which I have now temporarily 

 located it. 



29. SPILIPHERA \ Bastian. 



Gen. Chak. Sodi/ tapering at extremities, conical posteriorly. Caudal sucker elongated, 

 cylindrical ; sucker-tubes undeveloped. Integument having transverse rows of dots 

 or striae, and two longitudinal rows of dots close together in each lateral region, as 

 well as a spiral cervical marking on each side, close to the head ; cephalic setae mostly 

 present ; no papillae. Pharyngeal cavity cup-shaped, having longitudinal rays or 

 rib-like markings and tliree horny apophyses spreading from its base. (Esophagus fre- 

 quently enlarged behind pharynx, and generally terminating in an ovoid swelling. 

 Intestine mostly pretty well covered with large, coloured hepatic particles. Vulva 

 about middle of body. Uterus bifid; segments symmetrical. Spicules curved, 

 narrow. Accessory pieces two, somewhat ovate, indistinct. Ocelli absent. Anal 

 glands three, sometimes absent. Excretory ventral gland opening near middle of 



oesophagus. Lateral canals 



Movements moderately active. 



1. S. ELEGANS, n. sp. (Plate XIII. figs. 221, 222.) 



Male, length t^", breadth -^hs"- 



External Characters. — Body tapering most at posterior extremity. Head bluntly 

 rounded, provided with 2-4 minute setae, directed forwards. Integument having trans- 

 verse rows (two" apart) of minute rectangular dots, and two longitudinal rows of larger 

 ones, Tooo" apart, on each side of body. 



Pharyngeal cavity somewhat infundibuliform, Wo o" deep ; three curved equal-sized 

 apophyses extending backwards into substance of oesophagus, jiVs" iii length. (Eso- 

 phagus ^th of total length ; swollen opposite apophyses, and again very distinctly at 

 termination. Intestine covered irregularly with large-sized, greenish-yellow hepatic 

 particles. Anus -^' from posterior extremity. Spicules narrow, slightly curved, ^" 



' (TTTiXos, a spot, and ^epw, to bear, in reference to the integumental markings. 



