302 Dr. L. Orlcy on Nematodes. 



to be distinct are young forms of other species ; and the syste- 

 matic arrangement has much altered with the increase of our 

 knowledge. To take one example: — Ascaris rncisa, E.ud,, 

 has been recognized as the young form of Ascans depressa, 

 Rud. ; a large number of the species of Ascaris have been 

 removed to other genera 5 and all the forms assigned to the 

 genus Af/amonenia, Dies., have been discovered to be imma- 

 ture Ascarids. For this reason, indeed, 1 have put asexual 

 forms aside, and have described, without giving specitic names, 

 those which seemed of special interest. 



Although the collection of Nematodes cannot be set down 

 as a very rich one; yet it derives value from the circumstance 

 that a tolerably large number of genera are represented, and 

 that it contains the original specimens of the species described 

 by Baird and Siebold. The specimens are unfortunately, as 

 in most other collections, not in the best state of preservation ; 

 so that a renewal of many species is very desirable. The 

 greatest attention has, indeed, been devoted to the collection 

 recently ; but it is impossible to restore those specimens in 

 which decomposition has already set in. 8ome little ex])eri- 

 ence in the matter has taught me that if the worms are waslied 

 in 10-per-cent. nitric-acid solution and killed in weak alcohol, 

 they will keep remarkably well, if they are gradually trans- 

 ferred to stronger spirit, and if strong spirit be added to the 

 old alcohol every six months. 



I must content myself on this occasion with simply enume- 

 rating the species in the collection, without going into the 

 literature after the manner and with the same fulness as in 

 Baird's Catalogue ; for Linstow's Compendium * contains 

 almost the entire bibliography, and I could at best only copy 

 this. However, I shall take the liberty of enumerating cer^ 

 tain species which are accidentally omitted from Linstow's 

 Catalogue and of correcting certain errors, in order to supple- 

 ment this useful book where possible f. 



By the kindness of Dr. A. Giinther, the Keeper of the . 



* A very coaiplete account of the literature of Entozou is to be found 

 iu Dr. Cobbold's excellent worii ' Entozoa,' &c., 187!). 



t 1. Ascaris Icevissima, Baird, ' Catalogue of the Species of Entozoa/ 

 London, 18o;j, p. 25. JIab. India. 



2. Ascaris hifaria, Baird, ibidem, p. "JO. From the Korea. 



3. Ascaris uiululost>-sfriata, JJaird, is introduced as iiudidoso-sfriafa, 



and the liost iSarcorhainp]u(s\s set down iu the alpliabetical list as 

 Sacorrliamplnis. 



4. Fduria (jrucilis, Rud. Synops. Eutoz. p. 20<S ; Dujardin, Hist. 



uat. d. Helm. p. 46 ; Schneider, Monogr. d. Nemat. p. 87. llab. 

 In the peritoneum oi Lai/ofhri.v Jlm/ibuhlfii and Cvhiis cirpiicinns. 



5. Filar ia sanyuinea, Bud. Synops. pp. ;j&21ij Bujardiu, Hist. 



d. Helm. p. 01. 



