130 
MOLLUSCA. 
6. Atlantic shores of North America. 
A second edition of Gould^s Report on the Invertebrata of 
Massachusetts, under the care of W. G. Binney, as far as the 
marine mollusks are concerned, is compiled chiefly from the 
MSS. of the late author; almost every description is accom- 
panied by a woodcut ; the plates of the first edition arc not re- 
published, but twelve new ones, beautifully coloured, repre- 
senting principally naked mollusks, from drawings by Agassiz, 
Stimpson, &c., are added. Also the species found hitherto only 
on the shores of Canada, Labrador, &c. are included, so that 
tins very valuable work comprises the whole northern fauna 
between Davis Straits and Cape Cod. 
The marine Mollusca of Massachusetts are also reviewed by W. II. Dali, 
P. Dost. Soc. xiii. pp. 240-257 ; those of Lower Canada by Whiteaves, Canad. 
Nat. V. 1870; the Bivalves of New Haven by Perkins, P. Dost. Soc. xii. 
p. 138, 
Contemporaneous changes of the Fauna. 
Hyalina draparnaldi (Beck), at Hamburg observed for some time and 
perhaps introduced, seems now to be destroyed ; II, asjyersa (Miill.) has also 
been introduced sometimes by accident, but has never bred there. Wessel, 
Nachr. mal. Ges. ii. pp. 70, 77. The former has been found also in the palm- 
house of the Botanical Garden at Berlin with II. aUiaria. Friedel, ibid. 
p. 176. 
Some attempts at acclimatizing land-shells in several localities with nega- 
tive results are mentioned by Friedel, ibid. p. 79. 
Helix acuta (Miill.) arrived alive in gardens at Frankfort on palm- trunks. 
Kobelt, ibid. p. ICO. 
The only locality of H. vcrmiculata (Miill.) within the province of Venice 
is the Botanical Garden of Padua. Titius, in do Botla’s JNhilacol. Veneta, 
p. 63. [It was observed there in 1850 by the Recorder, and several years 
before by his father.] 
Helix foctens [var. duffti, Kobelt, see Zool. Rec. vi. p. 631] has been found 
in chinks and clefts of an old wall at Rudolstadt, but is now extinct, though 
it appears to have lived there probably less than a century ago. Also the 
variety of Limncea palustris^ described by Schroter in 1779 from Rudolstadt, 
and called Helix corvus, cannot be again found at present. Dufi't, Nachr. 
mal. Ges. ii. pp. 108, 109. 
Jiulimus detritus (Miill.) seems to be nearly extinct at Weilburg in Nassau. 
Sandberger, Nachr. mal. Ges. ii. p. 183. 
Planorbis dilatatuSj Gould, introduced at Manchester. Jeffreys, Ann. N. II. 
(4) iv. p. 341. 
Bithynia tentaculata (L.), found living in Lachine Canal, North America, 
is probably introduced from Europe. Am. J. Conch, vi. p. 284. 
The destructive influence of Elodea canadensis, when it becomes very luxu- 
riant, upon the Limnwee ani Bivalves, is observed by E. Friedel, Zool. Gart. 
1870, p. 362. 
The changes in the molluscan fauna caused by the disappearance of the 
