VON JHEKING : ON SOUTH AMERICAN MYTILID.E. 89 



My tilus canaliculus, Hanley : Dall, Nautilus, vol. v (1891), p. 43; 



vi (1893), p. 111. 

 ,, edulis, Linn. : Pilsbry, Nautilus, vol. xi (1897), p. 9. 

 ,, canaliculus, Hanley: Pilsbry, Nautilus, vol. xi (1897), p. 9. 

 ,, Fischer ianus, Tapparone-Canefri : E. A. Smith, Rep. Zool. Coll. 



Alert (1884), p. 44. 

 ,, edulis, Linn.: Jhering, Rev. Mus. Paulista, vol. ii(1897),p. 101. 



The examples from Montevideo are small and blue ; from the 

 " Patagonian coast we have much larger forms, which vary in colour. 

 The younger shells are yellowish, the older ones variable in colour, from 

 " yellowish to greenish and to blue. There is no reason for founding- 

 two species on these differences, as L'Orbigny and other authors have 

 3 done. I observe tbat If. Patagonicus, Clessin (Conch. -Cab., p. 82, 

 pi. i, figs. 5, 6), is not the species of D'Orbigny, as Clessin believes, 

 but a variety of If. angustanus, Lam., with which If. sinister, Dkr., 

 seems synonymous. 

 < M. canaliculus, Hanley, which seems to be only a variety of the 

 European If. edulis, has been considered by Crosse as a synonym 

 3 of If. chorus. The confounding of If. edulis with If. chorus is very 

 i noticeable in the literature, as 1 shall point out when treating of this 

 species. The Kerguelen species would be If. edulis according to 

 E. A. Smith, If. chorus according to Crosse ; the New Zealand If. edulis 

 is also doubtful in this sense. 



M. edulis occurs from the Magellan Straits to Montevideo, Rio 

 Grande do Sul, and also St. Catharina, but no farther northwards. 

 On the Chilian coast it is known as If. Chilensis, Hupe, If. Chiloensis 

 (Phil.), Peeve, If. obesus, Dkr. {nee Reeve?), and as M. trossulus, Old., 

 in California. 



If. -meridional is, Krauss, considered by Sowerby to be a variety of 

 If. edulis, is a synonym for If. chorus, and it would therefore seem 

 that If. edulis does not occur at South Africa. 



If. Hupeanus, Mabille & Rochebrune, is said by Dautzenberg (Act. 

 Soc. Sci. Chili, vi, 1896, p. lxv) to be II. Chilensis, Hupe. If. infumatus, 

 Mab. & Rochebr., is not recognizable in the absence of typical specimens. 

 Both are Magellanic species. 



2. Mttilus strigatus, Hanley (1844). 



Ifodiola strigata, Hanley: Proc. Zool. Soc, 1844, p. 15. 



,, ,, Hanley: Reeve, Conch. Icon., vol. x (1858), figs. 33 



and 83. 

 ,, fahata, Orb. : Jhering, Rev. Mus. Paulista, vol. ii (1897), 

 p. 106. 

 Mytilus sinuatus (Hunker MS.), Reeve: Conch. Icon., vol. x (1858), 

 fig. 16. 

 ,, falcatus, Orbigny : Voy. Arner. merid., torn v [1846], p. 645, 

 pi. lxxxiv, figs. 38, 39 v as If. Charruanusl). 

 Ifodiola arcuatula, Hanley : Clessin [nee Hanley), Conch. -Cab., 2nded., 

 p. 101 [1887], pi. xxx, figs. 8, 9. 



