1 72 Vroceedings. 



I may observe, in conclusion, that tlie plan adopted in exploring tlie river was 

 by traversing it backward and forwards, at equal distances of two yards, for a 

 distance of seventy yards from point of starting. I also beg to remark the work 

 was carried on during the night by means of flambeaux, or torch Ught : the traffic 

 on the river prevented operations being carried on during the day, which caused 

 delay and much greater risk than otherwise would have been in carrying out my 

 arrangements. 



Trusting the imperfect outline I have given of the system, construction, and 

 operations relating to the lost specie may be intelligible to you, 

 I am, &c. &c., 



John Gaenee Johnson. 



Lieutenant Smith read a short paper on the application of the several Codes of 

 Signals, of which he presented models and colorired designs lately to the Society. 



A paper by W. Swainson, Esq., F.E.S., on certain imdescribed amphibious 

 volutes on the shores of Tasmania, was read by the Secretary. Mr. Swainson found 

 three species in Mr. MiUigan's collection, and considering them as forming a group 

 intermediate between Melampus and Fedipes, he has placed them in a distinct 

 and separate faanily, which from then* habits he has named Crenohates : the species 

 are named — C. cornea, from Oyster Cove, where it aboirnds at certain seasons ; 

 C. parva, same locality, one specimen ; C. solida, from. Flinders' Island, where 

 it is occasionally found dead in great numbers on the beach, protected by the small 

 islands on its southern and western side. 



Mr. Swainson's paper contained also descriptions of three species of Wiodostoma 

 (Australian), found in Mr. Milligan's collection of exotic shells; and was illustrated 

 with accurate drawings of each of the shells described. 



After various discussions on the several objects and subjects brought under notice, 

 and a "particularly animated conversation on the comparative cost and economic 

 value of the Electric Telegraph, in which the Colonial Secretary, Dr. Butler, Capt. 

 Hawkins, the Secretary, and others took an active part, the thanks of the meeting 

 having been voted, on the motion of Mr, G. W. Walker, for the valuable contri- 

 butions and donations made, the Chairman rose, and the members soon after 

 separated. 



10th Mat, 1854. — Monthly meeting; His Excellency Sir W. T. Denison, 

 President, in the chair. 



The following members were present : — Drs. Agnew, Hall, M'Carthy, Smart, 

 Colonel Last, Major Cotton, Captain Hawkins, R. E., Messrs. James Burnett, 

 Francis Butler, W. T. N. Champ, Joseph Hone, Henry Hopkins, H. T. Kilburn, 

 Alexander MacNaughtan, Thomas Moore, George Eolwegan, Chester Eardley- 

 Wihnot. 



