252 Miscellaneous Intelligence. 
seen through the pes greenish or yellowish-white test. It is 
—— attached by the “base and lower part of one side. The 
apertures are ferroundud by a circle of bright lemon-yellow, and 
the ocelli are bright red. There are also two bright red spots 
connected with the nervous ganglia. The Ciona tenella (Stimp.), 
which is common in the Bay of Fundy, has the circles around the 
apertures bright re 
. Note by C. A. Wurre.—In the August race of this Jour- 
nal, p- 158, Mr. R. E. Call calls attention to two slight errors in 
my a article “On the Antiquity of certain Gidbordiwnte Types of 
Fresh-water and Land Mollusca ;” referring to the geographical 
distribution there attributed to Tnio complanatus Solander, and 
to my use of the name “Unio gi arnes,’ atter is 80 
plainly a typographical error that, if Anexoussble, it i is in no dan- 
ger of misleading any one. My statement in relation to the 
former question was based upon the identification as Unio com- 
Planatus Solander of — shells (collected by myself in Lowa) 
by the late J. nthony. I accepted that decision without 
nection, however important it may be in connection with the 
subject of the origination of those species. 
IIT. MisceLLaANgous Screntiric INTELLIGENCE. 
American and British Associations meet this eg on 
1. The 
the same day of August—the 25th, the former at Boston, the 
latter at Swansea. The President of the American iAmeetatibis is 
E 
2 eep-Sea Sounding and Dredging: A description and 
discussion of the methods and appliances used on board the Coast 
and Geodetic Survey Steamer “Blake,” by Cuarres D, Stesrer, 
Lieut. Commander U.S. Navy. 208 p- 4to, with 41 lates. 
Wisshinahar 1880, vu S. Coast and Geodetic Survey, Carlile 
P. Patterson, Superintendent.—This valuable volume describes 
in full detail, and with a profusion of excellent illustrations, the 
methods and appliances employed f for , deep-sea sounding and 
dredging on board the steamer “ Blake. 
The work of Lieut. Commander Sigabee, on the “ Blake” was 
carried on for four years beginning in the autumn of 1874. It 
