192 ANIMAL PAEASTTES. 



thological anatomists, on account of its having been confounded 

 with alveolar colloid, will justify us in treating of this subject 

 more in detail hereafter. 



Although it will have been seen that two distinct models may 

 be distinguished in the mode of production of the Echinococci, 

 it is, nevertheless, difficult to find a suitable nomenclature for 

 the two species thus formed. The denominations 



a. Echinococcus scolicipariens, and 



b. Echinococcus altricipariens , 



may, perhaps, appear the most proper, and I shall employ them 

 in the following pages. 1 



a. ECHINOCOCCUS SCOLICIPARIENS = ECHINOCOCCUS VETERINORUAI 

 of the earlier authors. 



Synon. : T&nia visceralis socialis yranulosa (Goze) ; T. granu- 

 losa (Gmelin) ; Vesicaria granulosa (Schrank) ; Hydatigena granu- 

 losa (Batsch) ; Hydatis erratica (Blumenbach) ; Polycephalus 

 hominis (Goze) ; Polyc. granulosus (Zeder) ; Polyc. humanus 

 (Zeder) ; Polyc. Echinococcus (Zeder) ; Echinococcus veterinorum 

 (Rudolph! et plurimi autores) ; Echinoc. Giraffae (Gervais) ; 

 Echin. Simla (Rudolph! aliique) ; Echin. granulosus (Rudolph!) ; 

 Echinoc. Infusorium (Leuckart) ; Echinoc. polymorphus (Diesing). 



[Tsenia matura : Ttenia minima, ad 3 mill. longo f corpore 3- aut 

 ^-articulato ; capite subgloboso, 0*3 mill, lato ; rostello parvulo, 

 rotundato, 0'125 mill, longo ; osculis suctoriis magnis (0'13 mill.} 

 animalis in duplice ordine positis 28 36, quorum majores ex 

 Leuckarlii mensura 0*045, minores 0*038, ex meis mensuris 0*034 et 

 0'028 habent ; collo longiusculo ; articulis 3 4, quorum ultimus 

 toto corpore longior (2 mill, long., 0*6 mill, lat.) est. Utero 

 mediand loculis et stolonibus nee ramis propriis instructd ; ovulis 

 ovalibus, 0*034 long, et 0*030 lat., testa 0*0019 mill, crassd, cavitate 

 internd 0*027 lat. et 0*030 long. 



Habitat : In Canis domestici, imprimis in Canis lanii fortasse 

 etiam in Canis Lupi tubo intestinali.'] 



Scolex quiescens=Echinococcus veterinorum sen scolicipariens : 

 Vesica minus pellucida, membranacea, in pariete ad 1 2 mill, 

 crassa, ex pluribus 0*005 0*01 mill, crassis lamellis concentricis 



1 See, on this subject, a paper by Professor Huxley " On the Anatomy and Develop- 

 ment of Echinococcus velerinorum" in ' Proceedings of Zoological Society of London/ 

 December 14th, 1852. ED. 



