386 Rev. R. T. Lowe on the Respiratory Organs 
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 aqua, quod pluribus terrestrium commune, non exseruerunt; hoc 
“ situ immobiles, mortuos quidem simulant; at intra paucas horas partim 
aqua exeunt, et observatori minus cauto perduntur; omnes vero, si ex 
aqua, immo post elapsum duodecim horarum spatium, tollantur, mox ten- 
“* tacula porrigunt, incedunt, ac brevi sese testa condunt.” Mull. Verm. Hist. 
p.17. 
Of his Hel. obscura (Bulimus obscurus, Drap.) he remarks, “ Aque 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. 
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Primo quidem experimento limacem periisse suspicabar ; corpus enim ewtra 
“ testam quasi exanimatum tentaculis in ipso corpore conditis herebat, dum mihi 
“ simul in mentem venit effatum nominati autoris de Cochlea sua VIII, eam 
nempe in aqua perire, atque hoc modo necari et e testa elici; brevi tamen 
sese vivum circumnavigando probavit. Cogebam enim in interiora test se 
“ recipere, ac testam aque reddidi; confestim egrediebatur, et fato tranquillus 
“ post intervallum trivm horarum ripe tandem appulit, ac sicco gavisus, ten- 
tacula promsit, et pro more incessit.” Id., Ibid. pp. 104, 105. 
At p. 99, heremarks of his Hel. succinea (Succinea putris, Auct.) ‘ Auctores 
hunc cognomine amphibium dixere, minus vero accuraté: maximam enim 
vite partem in sicco vivit, et in aqua 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 
“ aqua zqué ac in terra vivere crederetur: at hoc pluribus terrestrium com- 
“ mune est ; multos enim aque immissos non suffocari, quosdam sese, ut au- 
“ fugiant, aque sponte tradere ; ideoque locum aquis clausum, quem cochle- 
“ ariis instituendis Varro indicat, non satis tutum; varietatemque H. nemora- 
“ lis, quod singularissimum puto, fundo rivi tota estate vivere, observationi- 
“ bus didici.” Id., Pref. “‘ Testacea,’’ p. xi. 
The words are printed in Italicks which show the insufficiency of these obser- 
vations themselves to warrant the general conclusion he has drawn, “ in aqua 
“ non perire pluribus commune est,” at p. 99, andagain in the last quotation 
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