ON THE ANGUILLULIDA. 171 
GENERA IMPERFECTLY DESCRIBED. 
31. AMBLYURA, Hemprich and Ehrenberg. 
Enchelis, Hill; Vibrio, Müller; Enoplus?, Dujardin ; Anguillula, Leidy. 
Gex. Cmar. * Corpus capillare, extremitate caudali subulata, papilla suctoria sub- 
clavatum. Caput corpore continuum, truncatum. Os terminale, orbiculare, cir- 
rhatum. Ocelli nulli. - Penis simplex, nec vaginatus; apertura genitalis feminea 
M aere Aquarum dulcium et maris incola; natatoria." 
1. À. SERPENTULUS, Hemprich and Ehrenberg. 
Spalanzani, Microsc. 189, figs. 2 et 12.—Fränkische Samml. iv. 227, figs. b-f. 
Enchelis, Hill, Hist. Anim. tab. i. (ic. mediocris). 
Vibrio serpentulus, Müller, Verm. Terr. et Fluv. 24.—Ejus Zool. Dan. Prodr. 2449, et ejus Anim. Infus. 61, 
tab. viii. 15.— Bory, in Encyl. Méth. 1824, 777, tab. iv. 10.—Blainville, in Dict. des Sc. Nat. lvii. 
537, et lviii. 69. : 
Amblyura Serpentulus, Hemprich et Ehrenberg, Symb. Phys. Phytoz. Entoz. tab. ii. 14 (omissis cirrhis). 
—Ehrenberg, Infusionsth. 82.— Lamarck, Anim. sans Vert, 2" édit. iii, 663.—Dujardin, Hist. Nat. 
des Helminthes, 237. 
Anguillula longicauda, Leidy, in Proc. Acad. Philad. v. (1851) 225. 
Amblyura serpentulus ?, Leidy, ibid. viii. (1854) 49. 
* Cauda elongata, clavata. Longit. 1”. 
“ Hab. In infusione vegetabili plurium septimanarum et in palustribus, in Dania raro 
(Müller). In montibus Sinaiticis cum Confervis e rivulo vallis Wadi Esle prope Tor, et 
Berolini (Ehrenberg). Inter fila Lyngbye muralis aliarumque Confervarum in aque- 
ductu, Philadelphiæ (Leidy)." 
Nota. “ De Amblyura Serpentulo Berolinensi præterea sequentia valent :—Corpus sub- 
tilissime, transverse striolatum, subannulatum. Tubus cibarius hine ore, illinc ano 
terminatus simplex, strietura cardiaca insignis. Os terminale, anus ad caudæ basin 
lateralis. Feminarum apertura genitalis in medio corpore. Uterus bicornis. Feminæ 
maribus majores."— Hemprich et Ehrenberg. 
2. A. Gorprus, Hemprich et Ehrenberg. 
Vibrio Gordius, Müller, Anim. Infus. 60, tab. viii. 13, 14. ! 
Amblyura Gordius, Hemprich et Ehrenberg, Symb. Phys. Phytoz. Entoz.—Ehrenberg, Insfusionsth. 82.— 
Lamarck, Anim. sans Vert. 2"% édit, 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 :— i | 
= Amblyura serpentulus.—Body cylindrical, colourless, hyaline ; anteriorly obtusely nunded ; Ears nen 
tenuated, with a long, delicate, flexible, subulate tail; suctorial disk exceedingly minute, clavate. Mouth with cirri ; 
esophagus cylindrical, often with the appearance of a globular bulb at its lower end; intestines cylindrical. Anus 
tinct. Generative apparatus ? 
“Length of largest 44"; breadth Toyo" ; length of tail 547". Smallest, length ré"; breadth 555" ; length of 
tal sis". In an individual 11." long, the ceosophagus measured „55 long. > . 
“ Hab, Found under Lyngbya muralis and other Conferv 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 
