ON THE ANGUILLULIDÆ. 173 
« Og cirrhis quatuor instructum. Ocelli duo discreti. Longit...." 
« Hab. In aqua stagnante prope Berolinum (Nordmann).” 
9, P. mıcans, Nordmann. 
Phanoylene micans, Nordmann, in Lamarck's Anim. sans Vert. 2% édit. iii. 664.—Dujardin, Hist. Nat. 
des Helminthes, p. 238. 
“Qs cirrhis duobus instructum.  Ocelli coaliti. Longit..." 
« Hab. In larva Neuropteri ( Nordmann)” 1. 
In all probability, this was a mere accidental tenant of the intestine of the Neuro- 
pterous larva in which it was found by Nordmann—having been swallowed with its food. 
The presence of ocelli renders it almost certain that it could not be an habitual parasite ; 
and the experiments of Davaine (Recherches sur l'Anguillule du Blé niellé, p. 64) have 
demonstrated that these Nematodes pass uninjured through the intestinal canal of many 
of the invertebrate and cold-blooded vertebrate animals. 
The only freshwater genus in which I have yet met with species possessing ocelli has 
been Monhystera. 
The three following marine species I am very uncertain about, and have therefore 
merely followed Eberth in'allowing them to remain in this genus. 
3. P. ROSEA, Eberth. 
Lineola rosea, Kölliker, Verhandl. d. Naturforsch. Gesell. in Zürich, 1845.—Eberth, Untersuch. über 
Nematod. p. 18. 
* Rosenrothe Farbe, Kopf dreilappig, stumpf, Mundhóhle unbewaffnet, Fühler gleich 
lang, an der basis der Kopflappen; seitlich an der Speiseröhre zwei braune viereckige 
Flecken."— Eberth. 
4. P. OBTUSICAUDATA, Eberth. 
Lineola obtusicaudata, Kölliker, Verhandl. d. Naturf. Gesell. in Zürich, 1845.—Eberth, Untersuch. über 
Nematod. p. 18. i 
* Kopf noch stumpfer, und die braune Flecken noch einmal so gross, von 0:066", 
Fühler sehr kurz, 0-001-0-0013/” lang, vier fast ganz vorn, zwei etwas weiter hinten, alle 
mit dicker in der haut steckender Basis, Schwanz stumpf, kurz, 0:0033" lang. Penis 
sehr kurz, von 0:015’”.— Zberth. 
5. P. Frusrra, Eberth. 
Eberth, Untersuch. über Nematod. p. 18. 
Ascaris Flustre, Dalyell, * The Powers of the Creator displayed in the Creation," vol. ii. 1853, p. 92, pl. x. 
fig. 27.—Leuckart, Archiv für Naturges. 1859, Jahrg. 25, Bd. ii. S. 101 u. 146. 
“Length half a line; body slender, nearly eylindrical ; extremities acute. Colour 
dark grey or brownish, with a darker line in the centre of the anterior extremity, denoting 
“Internal organ. Two very conspicuous black specks, resembling eyes, are seated just 
at the origin of the anterior pellucid part. 
' The account of this genus, so far, has been taken from Diesing's ' Syst. Helminth.’ p. 128. 
