'3B6 THE NAUTILUS. 
their hosts. By “domiciliares” are meant creatures which live 
upon or burrow in shells, “ not for the purpose of getting at the softer 
parts of the mollusk upon whose shell they have ‘ squatted,’ in order 
to use said soft parts for food, but solely for the purpose of a 
residence or domicile.” Such are the pholads (Penetella) which 
stake out their mining claims on the Haliotis rufescens. But most 
extraordinary of all is the case of certain little fishes of the genera 
Fierasfer and Oligocottus. These little fellows enter the gaping shell 
of Meleagrina, impelled I suppose by greed for a meal or perhaps 
by a Pandora-like curiosity to see what is within the rough valve-lid. 
Once inside they “ find no obstruction to their course as they push 
their way towards the interior between the mantle and the smooth 
inner surface of the valves until they approach the adductor muscle, 
and here they find a barrier which causes them to expend somewhat 
greater activity or energy, and in a corresponding degree disturb the 
serenity if not the structural economy of the oyster.” And here the 
explorer is “entombed in pearl.” Three plates accompany the paper, 
showing the struggling, tired, little minnows as neatly over laid with 
pearl as Chinese josses inside a Dipsas shell. Ol/gocottus has not 
previously been observed caught in this way.—H. A. P. 
An excellent list of Rhode Island Mollusks by Mr. H. F. Car- 
penter has been received, and will be commented upon in the August 
NAvTILUs. 
Mou.tusca oF Minnesota, by Uly 8. Grant. Another brief 
contribution to a knowledge of Minnesota Mollusks appears in the 
recently issued report of the Minn. Geol. and Nat. Hist. Survey. It 
includes notes on thirteen forms not before recognized in the State, 
besides additional remarks on species previously noted. It is under- 
stood that Mr. Grant will shortly have ready a revised annotated 
catalogue, bringing together the matter already published, and in- 
corporating also notes on the material acummulated during the 
progress of the Survey. His personal field work during several sea- 
sons in the northern and other unfrequented portions of the State has 
no doubt brought to light many important facts—C. Rk. KEYES. 
