296 PARASITES OF MAN. 



longer speak of the genera Distoma, Tristoma, Polystoma, Sclerostoma, and 

 so forth ; hut, following Diesiug, they prefer to convert the final Greek 

 component into a true Latin syllable. Thus we have Uistoininn, Pohj- 

 stomum, Sderostomum, and the like. Long habit has so fully famUiarised 

 us with the old plan of retaining the Greek termination unaltered, that 

 I confess to some reluctance in parting with the final component (stovui) 

 although the form is not strictly classical. On the other hand, the 

 introduction of new and more striking departures from the legitimate 

 method -of employing the binomial nomeuclatuz'e is much to be 

 deprecated. Such a barbarism as Hijpewodon hutzkopf, for example — 

 intolerable as it must sound to the scholar's ear — is, nevertheless, freely 

 accepted by well-known Naturalists both at home and abroad. In 

 helminthology there are probably fewer glaring errors of nomenclature 

 than occur in other departments of Natural History science. Never- 

 theless, I think Mr. Grove's criticism in the matter of the family term 

 Distomidce perfectly just.* Following the practice of the late Edward 

 Forbes and others, I have frequently, and as I think fittingly, employed 

 the names of savans for the purpose of forming new genera and species. 

 Thus, by almost universal consent (on the Continent, at least,) my genus 

 Bilharzia has been adopted ; its general acceptance being in part due, no 

 doubt, to the fact that, as a genex-ic term, it had priority over the various 

 other titles severally proposed by Diesing, Weinland, and Moquin-Tandon. 



Nematoda continued. 

 28. — Filaria lentis, Diesing. 



Synonymy. — Filaria octili, Owen ; F. oculi-huniani, Von Nordmann. 

 Kemarks. — This small worm was originally discovered in a case of 

 lenticular cataract, under the professional care of the distin- 

 guished oculist Von Griife. Similar cases have also been 

 recorded by Jiiugken and Sichel, by Gescheidt and Von Amnion, 

 and by M. Fauo. There is no certain evidence as to the sexual 

 maturity of the worms obtained in these cases, although in one 

 instance the parasite measured three-quarters of an inch in 

 length. 

 Literature. — The standard works of Leuckart (1. c. Bd. II., s. G'22,) 

 and Davaine, (1. c. deuxieme edit., p. 831,) and in my Entozoa, 

 (p. 332.) 

 29. — Filaria labialis, Pane. 

 Syn. — None. 



Remarks. — The original description of this species was based upon 

 the "find" of a medical student at Naples. The worm (of 

 wliich tlie female only is known) was an inch and a quarter in 

 lengtli, and occupied a pustular cavity in the upper lip. 

 Lit. — Quoted by Leuckart (s. GIO) and Davaine, (Synops, c. VTI..) 

 from Pane's Nota di un elmiute nematoide, in Anuali dell. 

 Accad. degli aspirante Naturahste, Napoh, 180-1, (Ser. 3, Vol. IV.) 

 30. — Filaria hominis oris, Lcidy. 

 Syn. — None. 



Remarks. — This apparently sexually immatui-o worm was 

 described by Prof. Leidy, from a specimen preserved in alcohol, 

 and labelled as having been obtained from the mouth of a child. 

 It measured live and a half inches in length. 



* See tlie " Midland Naturalist " for May, p. 123. 



