636 MR. E. A. SMITH ON LAND AND FRESHWATER [NoV. 7, 



Mr. Dall observes, " If it were not for Martini's name it is very 

 likely that the name Bulimus, Scopoli, would have to be adopted 

 for this genus." This appears to me an entirely wrong conclusion, 

 for Scopoli at the reference cited (Introd. Hist. Nat. p. 392) 

 neither described ner referred to any species of the genus in ques- 

 tion, and the figure in Swammerdam's Mork (Bib. Nat. tab. ix. 

 fig. 4) does not represent Vivipara fasciata as stated by Dall (he 

 cannot have seen the work), but is a fairly characteristic I'epresen- 

 tation of a Limniea, apparently L. stagnalis. 



I do not for a moment believe that Scopoli intended that 

 Bulimus was to be regarded either as distinct from or an emen- 

 dation of Adanson's BuUnus. I regard it as merely an oversight in 

 the spelling, or a printer's error. If he considered it distinct, surely 

 he would not have put Adanson's name after it ; moreover he 

 clearly tells us (Delic. Flor. et faun. Insub. 1786, p. 67) that, 

 following Adanson, he calls certain shells " BuUmos." I think the 

 preceding remarks fairly answer Mr. Ball's question as to " how 

 we can avoid retaining Scopoli's name Bulimus for the species Helix 

 tentaeulata, Linne," now classified under Gray's genus Bythima, 

 for, if we take the figure of Swammerdam as his type, Bulimus 

 would then replace Limnaa, and if we select the first species he 

 quotes {Helix putris) it \\ould take the place of Succinea. 



The objection raised by Mr. Dall against using Viviparus on 

 the grounds that there is an impropriety in making the " bearer of 

 living young " a male, is of little importance. Perhaps it would 

 have been fortunate had INIoutfort used the feminine termination ; 

 but as he did not, I, for one, prefer to let the genus remain 

 Viviparus as originally published. 



14. ViTiPARUs MWEEUENSis. (Plate LIX. figs. 5, 6.) 



Testa umlilicata, conica, in medio carinata, tenuis, suhpelhicida, 

 pcdlida, epidermide fwjaci tenui olivacea induta ; anfr actus Q, 

 suhceleriter accrescentes, ohlicpie tahdati, superne obtuse angtdati, 

 striis spiraJihus plus minus pun ctatis tenuissimis confertis, lineis 

 incrementi ohliquis decussatis sculpti, idtimus ad peripheriam 

 conspicue et subacute carinahis, inferne concentrice punctafo- 

 striatus ; spira conica, turrita, ad apicem acuta ; apertura 

 anf/idatim rotundata, lonQit. totius ^ ^K'^d cequans, antice 

 subacuminata, paido effusa ; peristoma tenue, margine dexiro 

 obliquo, ad carinam angidaio, late sinuato, columellari arcuato, 

 anguste expanso et refiexo. 



Longit. 37 millim., cliam. 30 ; apertura 1 7 longa, 16 lata. 



Yav. PAGODiFORMis. (Plate LIX. fig. 7.) Testa sub epidermide 

 tenui phis minus rosacea, anfractihus planiuscidis, inferne ad 

 suturam forte carinatis, pagodiformihus, et apertura in medio 

 labri acute angulata. 



Hab. Lake IMweru (i?. Craiusliay). 



This is one of the most interesting shells in the collection, and 

 belongs to that group of the genus Viviparus which I at one time 

 considered distinct, and described under the name Neotliauma. 



