WOIIMS FUO.M MAMMALS AND HIltDS. 493 



doubt that we have botli dealt with the saine foi'iii. F. martis 

 is very imperfectly known, and until new niateri;i.l is described 

 the relationship between the two species must remain doubtful ; 

 there are certain characters, e.g., the position of the vulva., Avhich 

 in our present state of knowledge it is impossible to reconcile. 



Hall has pointed out that v. Linstow's specific name is a 

 homonym of F. stihcittanea Parona, 1894. I have followed his 

 example and refrained from renaming the species until its proper 

 rela,tionship with Filaria martis is ascertained. 



My material was obtained from the same animal as the mici'o- 

 lilaria recorded by Plimmer (1915) in his annual repoi't on the 

 blood-parasites ; Hall is therefore right in assuming that this 

 larval stage is to be referred to F. subcutanea v. Linst. 



Text-figure 2. 



Filaria subcutanea v. Linst. 



Posterior extremity of male, lateral view. X 225. 



po., postanal i)apilla; pr., preanal jjapilla; sp., short spicule; sjji., long si)icule. 



b'pecific diagnosis. — Filaria : Body filiform, moie attenuated 

 posteriorly than anteriorly, both extremities rounded. 



Cuticle appears smooth except under very high magnifications, 

 when a fine transverse striatioii is apparent. 



Head-papilla? very small, four submedian papillte present, 

 lateral papillae not noted. 



Gj]sopha,gus simple, i. e. not divided into anterior and postei'ior 

 regions, and short. 



Male 48-56 mm. long, with a maximum thickness of about 

 0'45 mm. Qilsophagus l'2-l-4 mm. in length. 



The posterior end of the body is coiled in a loose spiral and 

 provided with cuticular alpe at its extremity. Cloaca O'OT mm. 

 from the posterior extremity. There seem to be nine pairs of 

 papillse, of which four are preanal and five postanal. The papillte 



