238 VELUTINID^E. 



Mr. Peach's excellent observations were continued re- 

 gularly for ten years. Every season the Lamellaria, as 

 if impelled by the same instinct which takes the salmon 

 to the river, and the herring to shallower water, migrated 

 inshore and sought its proper spawning-ground. Mr. 

 Hennedy had previously to Mr. Peach, (' Zoologist ' for 

 1853, p. 4185) noticed this instinctive habit in Lamel- 

 laria. The only mistake Mr. Peach appears to have 

 made — a very pardonable one — was in supposing that 

 his specimens belonged to the species called tentaculata 

 by Forbes and Hanley. They are undoubtedly the 

 typical form, which I have ascertained to be the female. 

 That the other form is the male is manifest from the 

 descriptions of M. Bouchard and Dr. Johnston. The 

 epidermis of the shell becomes blistery if soaked in water, 

 like that of some exotic snails. 



The types of both Montagu's species are in the British 

 Museum, and represent the two sexual forms. The male 

 is the Marsenia complanata of Leach, the female his M. 

 producta. The latter is the Bulla haliotoidea of Mon- 

 tagu, and has half a dozen other less known-synonyms. 



Genus II. VELUTI'NA* Fleming. PI. III. f. 7. 



Body compressed : mantle thick or puffy : snout large and 

 gibbous. 



Shell external, yellowish-brown, not very thin : epidermis 

 thick, velvety. 



Indicated by Fabricius in 1780. It was founded on 

 the Bulla velutina of O. F. Muller by Dr. Fleming, in 

 his ' Philosophy of Zoology/ 1822; and M. de Blain- 

 ville, apparently without any knowledge of Fleming's 

 prior publication, proposed the same generic name for 



* Ye ety ; name (not classical) derived from the epidermis. 



