386 Rev. R. T. Lowe on the Respiratory Orgayis 



difference of function or power in the animal, it seemed most natural 

 and simple, at that time, to infer the probability of some corresponding 



tamen in aqu4, quod pluribus terrestrium commune, non exseruerunt; hoc 

 situ immobiles, mortuos quidem simulant ; at intra paucas horas partim 

 aqu^ exeunt, et observatori minus cauto perduntur ; omnes vero, si ex 

 aqu^, immo post elapsum duodecim horarum spatium, toUantur, mox ten- 



" tacula porrigunt, incedunt, ac brevi sese testa condunt." Mull. Verm. Hist. 



p. 17. 



0{ his Hel. obscura ('Bulimtis obscurus, Dtay).) he remarks, " Aquae immer- 

 " sus non perit, sed ripam petit." Id.,Ibid, p. 103. Speaking of Hel. lubrica 

 (Bulimus, Drap.), he again professes to contravene GeofFroy's correct state- 

 ment: " Aquis immersus non perit, licet Clariss. Geoffroi contrarium affirmat. 

 " Prime quidem experimento limacem periisse suspieabar ; corpus enim extra 

 " testam quasi exanimatum tentaculis in ipso corpore conditis hcerebat, dum mihi 

 " simul in mentem venit efFatum nominati autoris de CochleS, sua VII f, earn 

 " nempein aqu&, perire, atque hoc modo necari et e testS. elici; brevi tamen 

 " sese vivum circumnavigando probavit. Cogebam enim in interiora testae se 

 " recipere, ac testam aquae reddidi ; confestim egrediebatur, et fato tranquillus 

 " post intervallum trium horarum ripae tandem appulit, ac sicco gavisus, ten- 

 " tacula promsit, et pro more incessit." Id., Ibid. pp. 104, 105. 



At p. 99, he remarks of his Hel. succinea (Succineaputris, Auct.) " Auctores 

 " hunc cognomine amphibium dixere, minCis vero accurate : maximam enim 

 " vitae partem in sicco vivit, et in aqu&. non perire pluribus commune est, 

 " varietatemque Hel. nemoralis in rivo plures dies degere vidi." Id. Ibid. p. 99. 

 Here he rightly considers the animal of which he speaks as terrestrial; but I 

 make the quotation for the sake of the general remark, and the particular fact of 

 the Hel. nemoralis ; both again alluded to in the following passage of his Pre- 

 face or Introduction. 



" Helicem succineam auctores amphibium dixere, quum ei soli proprium in 

 " aqu&, aeque ac in terr^ vivere crederetur : at hoc pluribus terrestrium com- 

 " mune est ; multos enim aquae immissos non sufFocari, quosdam sese, ut au- 

 " fugiant, aquae sponte tradere ; ideoque locum aquis clausum, quem cochle- 

 " ariis instituendis Varro indicat, non satis tutum; varietatemque H. nemora- 

 " lis, quod singularissimum puto, fundo riri tota aestate vivere, observationi- 

 " bus didici." Id., Praef. " Testacea," p. xi. 



The words are printed in Italicks which show the insufficiency of these obser- 

 A'ations themselves to warrant the general conclusion he has drawn, " in aqu^ 

 " non perire pluribus commune est," at p. 99, and again in the last quotation 



