ON THE ANGUILLULIDiE. 171 



GENERA IMPERFECTLY DESCRIBED. 



31. AMBLYTJRA, Hemprich and Ehrenberg. 

 Enchelis, Hill; Vibrio, Muller ; Enoplus}, Bujardin; Anffuillula, Leidy. 

 Gen. Chab. " Corpus capillare, extremitate caudali subulata, papilla suctoria sub- 

 clavatum. Caput corpore continuum, truncatum. 0* terminale, orbiculare, cir- 

 rhatum. Ocelli nuUi. Fenis simplex, nee vaginatus ; apertura genitalis feminea 

 Aquarum dulcium et maris incola ; natatoria." 



1. A. SEUPENTULUS, Hsmprich and Ehrenberg. 



Spalanzani, Microsc. 189, figs. 2 et 12. — Frankische Samml. iv. 227, figs. b-f. 

 Enchelis, Hill, Hist. Anim. tab. i. (ic. mediocris). 

 Vibrio serpentulus, Miiller, Verm. Terr, et Fluv. 24. — Ejus Zool. Dan. Prodr. 2449, et ejus Anim. Infus. 61, 



tab. viii. 15.— Bory, in Encyl. Meth. 1824, 777, tab. iv. 10.— Blainville, in Diet, des Sc. Nat. Ivii. 



537, et Iviii. 69. 

 Amblyura Serpentulus, Hemprich et Ehrenberg, Symb. Phys. Phytoz. Entoz. tab. ii. 14 (omissis cirrhis). 



— Ehrenberg, Infusionsth. 82.— Lamarck, Anim. sans Vert. 2"'' edit. iii. 663. — Dujardin, Hist. Nat. 



des Helminthes, 237. 

 Anffuillula hngicauda, Leidy, in Proc. Acad. Philad. v. (1851) 225. 

 Amblyura serpentulus"?, Leidy, ibid. viii. (1854) 49. 



" Cauda elongata, clavata. Longit. ■§■'"." 



" Sab. In infusione vegetabili plurium septimanarum et in palustribus, in Dania raro 

 {Iliiller). In montibus Sinaiticis cum Confervis e rivulo vaUis Wadi Esle prope Tor, et 

 Berolini {Ehrenberg), Inter fila Lyngbym muralis aliarumque Confervarum in aquge- 

 ductu, Pbiladelpliia? (Jjeidt/^)." 



Nota. " De Amblyura Serpentulo Berolinensi prseterea sequentia valent : — Corpus sub- 

 tilissime, transverse striolatum, subannulatum. Tubus cibarius hinc ore, LUinc ano 

 terminatus simplex, strictura cardiaca insignis. Os terminale, anus ad caudse basin 

 lateralis. Eeminarum apertura genitalis in medio corpore. Uterus bicornis. Eeminse 

 maribus majores." — Hemprich et Ehrenberg. 



2. A. GoRDius, Hemprich et Ehrenberg. 



Vibrio Gordius, Miiller, Anim. Infus. 60, tab. viii. 13, 14. 



Amblyura Gordius, Hemprich et Ehrenberg, Symb. Phys. Phytoz. Entoz. — Ehrenberg, Insfusionsth. 82. — 



Lamarck, Anim. sans Vert. 2"'"' edit. iii. 663. — Dujardin, Hist. Nat. des Helminthes, 238. 

 Enoplus elongatus, Dujardin ?, Hist. Nat. des Helminthes, 238. 



' Dr. Leidy's description, collected from the two notices, is as follows : — 



" Amblyura serpentulus. — Body cylindrical, colourless, hyaline ; anteriorly obtusely rounded ; posteriorly at- 

 tenuated, with a long, delicate, flexible, subulate tail ; suctorial disk exceedingly minute, clavate. Mouth with cirri ; 

 oesophagus cylindrical, often with the appearance of a globular bulb at its lower end ; intestines cylindrical. Anus 

 indistinct. Generative apparatus ? 



" Length of largest -^J' ; breadth yjj'jnr" ; length of tail ^ttoo"- Smallest, length -j-Lj" ; breadth auVu" ; length of 

 tail ^tr"- ^" ^^ individual pL" long, the ceosophagus measured sxinr" l°ng- 



" Hab. Found under Lynghya muralis and other Confervee about gutters and water-spouts in the City of Phila- 

 delphia. This species is very active in its movements, and appears to have the power of fixing itself by the end of 

 the tail to surrounding objects." 



z 2 



