Q ME. T. SCOTT ON ENTOMOSTRACA 



they presented for ascertaining something of life at these depths. In lat. 0' 7' 8" S., 

 lono-. 14° 28' 6 " "W., nets were employed at intervals down to 100 fms. on March 10 ; 

 and again on March 11, down to 76 fms., in lat. 0° 0' 7" N., long. 13° 4' W. 



The time of exposure of tow-nets varied with circumstances and opportunities from 20 

 minutes to 7 hours (the latter when sent adrift from the ship). Inshore nets taken at 

 Conakoy, Isles de Los, Bullama, Bassao, Dakar, Accra, off Little Bassam, in the vicinity 

 of the suhmarine gully known as the " bottomless pit," Porto Novo, Libreville (Gaboon 

 River), Bananah Creek (Congo River), and St. Paul de Loanda were always at or near 

 the surface. Of special interest is the series procured during soundings in the vicinity 

 of the Congo canon, where gyrations of the water, accompanied by the production of 

 coarse bubbles of foam, were very evident on the surface of the sea. 



For Ascidia, Prof. Herdman had recommended three plans, all of which were employed, 

 viz. : (1) picric acid and alcohol ; (2) osmic acid and alcohol ; and (3) picric acid alone, 

 without alcohol, for Saljjcs and Doliolmn. Some were also preserved in glycerine, 

 without either picric acid or spirit to prevent opacity. Por living specimens of sclero- 

 dermic corals, of which only a few were obtained, the corrosive sublimate treatment 

 was employed. No Hydrozoa were preserved, according to Pagenstecher's * method, by 

 the use of sodium chloride and alum succeeded by stronger and stronger alcohols. Por 

 the Peridinidffi, of which several were obtained, Gcza Entz'sf recommendation of 

 glycerine was not followed, though tried, chiefly on account of refractive considerations. 

 Porifera have been treated by Keller % with osmic and chromic acids, the former of the 

 strength of -^-(,- to ro pei' cent., the latter very dilute ; but of these, the only repre- 

 sentatives obtained were found on the shore at Ascension Island, and were immediately 

 placed in spirit. 



Subjoined is a list of the positions of the 48 stations of the expedition, where the best 

 available means were adopted for obtaining collections, with the sru'face temperature 

 observed at each : — 



Station I. Dec. 29, 1885, lat. l.r 48' N., loug. 19° 18' W. (75° F.). 



II. Jan. 1, 1886, lat. 7° 54 N., long. 17° 25' W. (82°-2 F.). 

 lat. 7° 1' N., long. 15° 54 W. (82°-9 F.). 

 lat. 7° 33' N., long. 15° 18' W. (83° F.). 

 lat. 7° 20' N., long. 13° 26' W. (83°-2 F.). 

 lat. 7° 8' N., long. 13° 27' W. (83°-4. F.). 

 lat. 5° 48' N., long. 14° 20' W. (85°-5 F.). 



lat. 3° 57' 2" N., loug. 7° 42' 8" W. (82°-8 F.). Here a S.E. current 

 down to 150 fms. 



* Zeitschr. wiss. Zool. xvii. (1S67) p. 379. 



t Zool. Anzeig. 1881, p. 575. 



X Zeitschr. wiss. Zool. xxx. p. 568. 



