338 PROCKKBINGS OF THK MALACOLOGICAL SOCIKTY. 



whieli Fischer considered Bnrina merely a section. If, however, we 

 consider it generically distinct, the alteration becomes unnecessary. 



14, Mytilus FiscHERiANtrs, Canefri, var. (?). 



Mob. — San Sebastian Beach. 



A few small specimens which differ from the form figured by 

 Canefri in having the ventral outline rather straighter, and the 

 posterior adductor scar is somewhat smaller. 



15. Mytilus (Adlacomya) Magellanicus, Chemnitz. 

 Hah. — San Sebastian Beach. 



16. Brachydontes sp. 

 Sab. — San Sebastian Beach. 



A single valve only, which I cannot identify at present. In shape 

 and size very like B. Darwinianus^ d'Orbigny, but more strongly 

 radiately sculptured. 



17. MoDioLARCA TEAPEZiNA (Lamarck). 

 JTrtS.— Rio McClelland. 



The specimens from this locality are of a deep purple-brown, which 

 externally is somewhat obscured by a thin olivaceous periostracum. 

 This species was figured by Kiister in 1841 (Con. Cab., pi. vi, 

 figs. 16, 17) as Modiola trape%ina. The same figures have since been 

 quoted by Clessin in the same work, Mytilida3, p. 155, as representing 

 Bacrydium vitreum, a minute northern mollusc, from which, of course, 

 it is quite distinct. 



Attention may also be directed to seven species (?), all from the 

 same locality, Orange Bay, described and figured by Mabille & Roche- 

 brune (Miss. Cap Horn, Moll., pp. 121-124, pi. vii, figs, la-lb). 

 Personally I must confess to being unable to appreciate the specific 

 value of these so-called species. Orange Bay is the same as Orange 

 Harbour, where so many shells were collected by the United States 

 Exploring Expedition under Commander C. Wilkes in 1838-1842. 

 It is situated on the eastern side of Hoste Island, one of the smaller 

 islands to the south of Tierra del Fuego. 



II. Land and Fresh-water Species. 



Only four land species and one from fresh water were obtained, 

 namely, two forms of Succinea, two Helicoids, and a new species of 

 Chilina. 



18. Succinea Patagonica, Smith, var. 

 Hah.— Rio McClelland. 



A little smaller and narrower than the types collected by 

 Dr. Coppinger. Perhaps the same as S. Lebruni, Mabille. 

 19. Succinea oedinaria, n.sp. Fig. iv. 



Testa imperforata, oblonga, tenuis, subpellucida, flavescenti-cornea, 

 versus apicem pallide rufescens ; anfractus 3-3J perconvexi, celeriter 

 accrescentes, sutura obliqua profunda sejuncta, lineis increment! sub- 

 rugosa striati ; apertura ovata ; peristoma tenue, margine columellari 

 callo tenui labro juncta. 



