NOTES AND QUERIES. 369 



me, excepting unhealthy individuals or those which had been injured 

 during capture, have learned to come to be fed from my fingers within 

 a few days — certainly within ten days — but I have unfortunately 

 omitted to keep a record of dates. It may be stated generally that, 

 when once a Blenny has been induced to take food from the forceps, 

 it thereafter begins to look for food whenever its tank is tended ; and 

 that, if tame individuals are already present, a new Blenny learns to 

 come for food more quickly than it would do if it were alone in the 

 tank. It is my custom to knock at the glass front of the aquarium 

 before feeding the Blennies, and they soon learn to look for food 

 whenever the glass is tapped. One consequence of this is that, if 

 the fishes have not recently been fed, a touch of the hand of a visitor 

 upon the glass often suffices to bring the Blennies crowding to the 

 front, where they will swim eagerly about, or sit and stare at him in 

 a very amusing and characteristic manner. I know of no other 

 British fish which becomes tame so quickly as does the Blenny. — 

 H. N. Milligan. 



Tameness in a Sea-Bullhead. — A female Bullhead (Cottus bubalis) 

 was placed in an aquarium on January 23rd. For the first three days 

 it was shy and refused to feed, but on the fourth day it quickly seized 

 and swallowed a piece of raw beef dropped close to its head. A 

 second piece of beef presented to it in wooden feeding-forceps 

 immediately afterwards was also swallowed. From the fourth day 

 until within a few days of its death on May 9th it always took its 

 food (beef, Shrimps, Prawns, small Crabs) very readily from the 

 forceps, and even so soon as by the end of the first week of captivity 

 it had begun to look eagerly upwards when the top of the aquarium 

 was removed and the forceps introduced into the tank. — H. N. 

 Milligan. 



MOLLUSCA. 



Wandle Freshwater Shells. — With regard to the list of freshwater 

 shells found at Beddington Corner, on the Wandle, which list is in 

 the Grange Wood Museum, South Norwood, I have found lately 

 these additional species, Limncea stagnalis, Planorbis vortex, carinatus, 

 Bithynia tentaculata, Valvata piscinalis, Sphcerium comeum, Pisidium 

 amnicum, not mentioned in the list. — G. F. Brown (Anerley). 



CRUSTACEA. 



Hardiness in the Common Prawn, ^sop Prawn, and Shrimp. — 

 I have frequently had occasion during the last three years to notice 



