NOTKS ON THE VICTORIAN SPECIES OK liDIJJNllS — HEULRV. 7 



rotund forin. To the diagnosis of Prof. Tate, I would now add that Isld- 

 ineUx has the tii'st wlioi'l wound in tlie same plane, whereas the initial 

 whorls of lUiJUiius, including Aiiierl((, are upthrust or muoronate. 



Prof. Tate instituted lxi(J()rt'!l(( "on the assumption tliat tlie lingual 

 ribbon will afford differential characters," from Tgodorci ; but it lias not 

 done so. For Cooke showed that the radula of hidorelld />lnjsopsix is of 

 the same pattern as that of Aiii('ii(( (il'icin' or of Ifodaru coiitorta. Tliough 

 geogi'a[)hical discontinuity might have encouraged Prof. Tate to liold these 

 forms apait, tliis argument was subsequently weakened by the appearance 

 of litodura in the iMoluccas, Celebes and Asia Minoi'. ]n Kuster's figure 

 of /. Jinirchli,^^ tlie columella is shown to be without a. fold. The weight 

 of evidence is thus towards uniting ratlier than towards dividing Isidnrelln 

 from hodorx. 



ISODOKA UAINESII, TnjOII . 



(Plate ii., fig. 19-20-21.) 



Fhi/.'^a (Tsidora) halytesil, Tryon, Am. Journ. Conch., ii., 1866, p. 9, PI. ii., 

 fig. 9 ; Id., Tate & Bi'azier, Proc. Linn. Soc. N.S.Wales, vi., 1881, p. 

 556; yj., Smith, Journ. Linn. Soc, Zool., xvi., 1882, p. 281 ; Id., 

 Clessin, Conch. Cab., i., Abth. 17, 1886, p. 866, PI. xlix., fig. 1 ; 

 Id., Cooke, Journ. of Conch., v., 1887, p. 241. 



rinj.^.t hitih, hiatal, Sowerby, Conch. Icon., xix., 1873, PI. v., fig. 33. 



J'liijsd riliium, Clessin, mss.. Op. cit., 1886, p. 351. 



]*}njs(t ^i-Jivdijeri, Clessin, mss., 0/)., cit., 1886, p. 366. 



Var. PILOSA — Fhi/xu pilosu. Ten. Woods, Trans. Roy. Soc. Vict., xiv., 

 1878, p. 63 ; Id., Tate & Brazier; Smith and Clessin, Oj). cit. 



Var. CREBRECililATA — Phi/sa erehreciliatd. Ten. Woods, Trans. Roy. Soc. 

 Vict., xiv., 1878, p. 63 ; Id., Tate, Brazier and Smith, Op. cit. ; Id., 

 Clessin, Conch. Cab., i., Abth. 17, 1886, p. 351, PI. xlix., fig. 10; Id., 

 Chapman, Mem. Nat. ]\[us. Melb., v., 1914, p. 58, PI., i., fig. 2. 



Fhys<( Jiirsutii, Ten. Woods, mss. 



Var. liRAZlRKi — Fliiff^K hrazieri. Smith, Journ. Linn. Soc, Zool., xvi., 

 1882, p. 286, PI. vi., fig". 22; Id., Clessin, Conch. Cab., i., Abth. 17, 1885, 

 p. 237, PI. xxxvi., fig. 3 ; Id., Tate, Rep. Horn Exped., Zool., ii. 1896, p. 215. 



Some of the names listed above were subordinated by Prof. Tate to 

 7. veifcoiiitii. Though impressed by his views, I prefer, for the present, 

 to hold that apart. I. Imiiiesii^ as understood liere, is a smaller and more 

 elongate form, which extends to the Pacific coast, while the larger 

 /. veiranuhl seems not to do so. 



As pointed out by Smith in the case of /. hrar.ieri, the species varies 

 in colour from dark liorn brown to pale straw ; the spire is moi'e or less 

 elevated and the epidermis is at times more dense and profusely ciliated 

 than at otheis. The pattern wliich the epidermis impresses on the sliell 

 varies relatively. 



n Kuster— ('(inch. Cab., i.. 1862, PI. xii., fi^^ 17-19. ' 



