432 Transactions. 



First, omit from the synonymy " P. sturnus, H. & J., t.c, 191 " (a syno- 

 nym of N. pileopsis Q. & G.); and add, " Patella antipodum E. A. Smith, 

 Voy. Ereb. & Terr., Moll., p. 4, pi. 1, f. 25, 1874." The forms of this 

 species recognized by Suter I cannot consider well defined. 



Patella argentea Quoy and Gaimard, 1834, is untenable, through Patella 

 argentea Gmelin, Syst. Nat., p. 3704, 1791 ; also Patella affinis Eeeve, 1855, 

 by P. affinis Gmelin, loc. cit., p. 3726, and Patella olivacea Hutton, 1882, 

 by the use of P. olivacea Gmelin, loc. cit., p. 3702. 



For Hutton's P. olivacea I propose the new name Gellana radians perana, 

 and would unite with it the so-called wC argentea.'" 



Suter has reduced to subspecific rank under this species the shell he 

 described as Helcioniscus mestayerae. This is not a New Zealand shell. It 

 was supposed to have come from Stewart Island, but when Miss Mestayer 

 showed me the type in 1908 I at once remarked upon its alien features. Miss 

 Mestayer concurred, and suggested that the locality was incorrect. A few 

 days iater, at Sydney, Mr. Hedley gave me a specimen agreeing entirely, 

 naming it as Patella testudinaria Linne. Into the synonymy of this exotic 

 species, then, must pass Helcioniscus mestayerae Suter : Stewart Island 

 (error) ; and it must be expunged from the Neozelanic list. 



Cellana strigilis (Hombron and Jacquinot, 1841). [P. 87.] 

 I cannot separate, even as a variety, Patella redimicuhim Reeve, which 

 Suter admits as a distinct species, writing, " The two are very nearly allied." 

 At Shag Point, Otago, I collected a long series showing gradation from the 

 one to the other. Only one species is admitted in the British Museum. 

 The variation in the species is really slight, and when the two forms are 

 studied in life it is easily seen that the elevation or depression is due to 

 environmental stress. At a point in Dunedin Harbour, Otago, I procured 

 many specimens of typical " strigilis, " leaving no doubt as to their develop- 

 ment by stress, as the juveniles were quite typical " redimiculum." 



Suter records both species from Preservation Inlet, and his measurements 

 of the " redimicuhim " shell agree almost with a " strigilis " from Tauranga 

 to a millimetre — viz., 58 x 47 x 23 mm. and 60 x 48 x 24 mm. 



My arrangement of the species of Cellana would be, — 



Genus Cellana H. Adams, 1869. Synonym : Helcioniscus Dall, 1871. 

 Cellana sp. ? ? Synonym : Helcioniscus antipodum Suter, not Smith. 



denticulata (Martyn, 1784). 



ornata (Dillwyn, 1817). 



radians (Gmelin, 1791). 



var. decoi'a (Philippi, 1848). 



var. earlii (Reeve, 1855). 



var. ? chathamensis (Pilsbry, 1891). Synonym: affinis 



Reeve, 1855, not Gmelin, 1791. 



v&v.flava (Hutton, 1873). 



var. perana nov. Synonyms : olivacea Hutton, 1882, and 



argentea Quoy and Gaimard, 1834, not Gmelin, 1791. 



— strigilis (Hombron and Jacquinot, 1841). Synonym: P. redi- 

 micuhim Reeve, 1854. 



— stellifera (Gmelin, 1791). 

 var. phymatia (Suter, 1905). 



A most delightful field of study here reveals itself, as the species and 

 varieties are repeated throughout the Dominion, and there must be a 



