ON THE ANGUILLULID^. 115 



prominent circular lip ; buccal apparatus none ; pharynx short ; cesopliagus long, clavate 

 or fusiform, slightly tortuous ; intestine cylindrical, brown in colour ; rectum distinct, 

 cylindrical, colourless. Tail acute. Ovary double. Generative aperture anterior to the 

 middle." 



" Length 2 to 2^ lines, breadth a^iV'j tail ^" long from anus. CEsophagus 2^" long ; 

 T33s" broad at commencement, 4^" at termination. Intestine 4-7V0 " broad. Rectum. 



tV" long." 



"Hab. Stagnant ponds and rain- puddles in the suburbs of Philadelphia." 



s 



12. A. ECAUDis, Ehrenberg. 



Monatsber. d. Berlin. Akad. 1853 (solum nomen), et ibid. 1855, p. 226. — Diesing, Sitzungsb. der Kais. 

 Akad. Bd. xlii. (1861) 629. 



" Hab. In terra muscorum Montis Eosse {Schlagintweit et Ehrenberg).^' 



13. A. LONGiCAUDA, Ehrenberg. 



Monatsber. d. Berlin. Akad. 1853 (solum nomen), et ibid. 1855, p. 226; ejus Mikrogeologie, 1854, tab. 

 XXXV. B. A. iii. F. (sine descript.). — Diesing, Sitzungsb. der Kais. Akad. Bd. xlii. (1861) 629. 



" Hab. In terra muscorum, Weissthorpass ad montem Rosse, in altitudine 11,138' 

 {Schlaginhoeit et Ehrenberg)." 



14. A. Uan^b tempobarl^, Perty. 



Kleinste Lebensformen, 156. 



" JSab. Rana temporaria, in tractu intestinali cum Opalinis, Bernee {Perty)." 

 " Sine dubio Anguillulse cum aqua haustse vel cum cibo in intestinum translatse." 



7. TRIPYLA 1, Bastian. 



Gen. Char. Body tapering at extremities. Caudal sucker large, well developed. Inte- 

 gument thick, having well-marked transverse striae, with lateral and ventral pores ; 

 setae none (?) ; cephalic papillae present or absent. Pharyngeal cavity none. (Eso- 

 phagus cylindrical, distinctly muscular ; posterior part separated by a constriction, 

 but not containing any valvular apparatus. Intestine rather sparsely covered with 

 coarse granules, their arrangement in cells not being visible. Vulva at about the 

 middle of body. Uterus bifid, segments symmetrical. Spictiles of an elongated 

 cuneiform shape. Accessory piece posterior, very small. Lateral canals indistinct, 

 having a faintly granular appearance. No regular ventral duct, but three large 

 integumental canals in same region, close to anterior extremity. 

 Movements active, often forminsj into a coil when touched. 



"a 



1. T. GLOMERANS, n. Sp. (PI. IX. figS. 16, 17.) 



Male, length ^", breadth ■^". 



External Characters. — Body white, cylindrical, tapering slightly forward, but more 

 backwards, where it gradually narrows to the weU-developed sucker. Head bluntly 



' Tpeis, three, and vvXr], an orifice, in allusion to the three well-marked integumental openings. 



Q2 



