MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 103 



body-whorl itself, below the periphery, there is a pale fulvous-brown spiral zone. We 

 are indebted to Mr EDGAR SMITH for having examined this and other species, and 

 have much pleasure in connecting his name with it. 



Rissoa fraudulenta, Smith. 

 Rissoa fraudulenta, E. A. Smith, Nat. Ant. Exped., Nat. Hist., ii., p. 9, pi. ii., fig. 3 (1907). 



Hob. Scotia Bay, South Orkneys. Dredged, 6 fathoms. 



Fine examples of this newly described, spirally striate Rissoa, differing from the 

 types in being straw-coloured, otherwise identical. 



Rissoa parva (Da Costa). 



Turbo parvus, Da Costa, Brit. Conch., p. 104. 



Rissoa parva, Forbes and Hanley, iii., p. 98, pi. Ixxvi., figs. 2, 6 ; pi. Ixxvii., figs. 6, 7 ; and 



pi. Ixxxii., figs. 1-4. 

 ,, Jeffreys, Brit. Conch., iv., p. 23 ; v., pi. Ixvii., fig. 3. 



Hab. Shore, Port William, Falkland Islands, January 31, 1904. 

 These specimens cannot be dissociated from the typical European and British 

 shell, and have probably been accidentally imported into the Falkland Islands. 



Rissoa (Onoba) Scotiana, sp. n. (Plate, fig. 5). 



R. (Onoba) testa albida, imperforata, solidiuscula, fusiformi, anfraotibus 6, quorum apicales duo pervitrei, 

 globulares, ceeteris apud suturas impressis, ventricosis, undique arctissime" spiraliter striatis, ultimo anfractu 

 zonula straminea obscura ad medium prsedito, superficie interdum obscure longitudinaliter costellata, apertura 

 semicirculari, intus albo-lactea, peristomate incrassato, continue, paullum effuso, columella obliqua. 



Long. 3, lat. 1 mm. 



Hab. Station 325, Scotia Bay, South Orkneys, 9-15 fathoms, April 1903. 



With a superficial resemblance to Rissoa (Onoba) slriata, Mont, a well-known 

 European species, this little shell seems, likewise, akin to R. (Ceratia) turqueti, 

 E. Lamy,* recently described from Wandel Island, from which it differs in possessing 

 one whorl more, in being not in the least degree rimate, in the thickened continuous 

 peristome, and the obscure spiral straw-coloured zone encircling the body-whorl. 

 Perhaps, in time to come, additional links to bind these two species together may 

 be found. 



Rissoa (Manzonia) zetlandica (Mont.). 



Turbo zettandicus, Montagu, Trans. Linn. Soc., xi., p. 194, t. xiii., fig. 3. 

 Rissoa zetlandica, Forbes and Hauley, iii., p. 78, pi. Ixxx., figs. 1, 2. 



Jeffreys, Brit. Conch., iv., p. 20 ; v., pi. Ixvii., fig. 1. 



Hab. Shore, Port William, Falkland Islands, January 31, 1904. 



Obtained at the same time as R. parva (Da Costa), it is equally probable that this, 



* Bull. Mus. Hint. Nat. Paris (1905), p. 479, fig. ; Exped. Charcot, p. 6, pi. i., fig. 8. 

 (ROY. soc. EDIN. TRANS., VOL. XLVI., 133.) 



