228 



Dr. J . Gwyii J efFreys on the 



[June 15^ 



stria) marginal. The total length varies from a ninth to a tenth of an 

 inch, and the front view has a diameter about joVd? the side view about 

 Y^iTo inch. The striae are 40 to 50 in a thousandth of an inch. 



From Mr. Jeffreys I also receiv ed specimens of an organism found by 

 Mr. Hart, the naturalist of the ' Discovery,' drifting on the surface in 

 lat. 59° 36' N., long. 39° 10' W. The same was also found by Mr. 

 Jeffreys in 59° 16' N., long. 37° 16' AV. It consists of dense fleece-like 

 tufts of a species of Podosphenia. It agrees very well with the charac- 

 ters of P. elongata, Ktz. The latter species is not uncommon on Euro- 

 pean coasts gro\Aing upon various Algae. The specimens collected by 

 Mr. Hart are attached to fragments of Algae, in one case, apparently, 

 to a piece of a species of Fiicus, and therefore probably drifted from some 

 coast-line. I have compared Mr. Hart's specimens with a Scotch example 

 of P. elongata, and I find they agree. The frustules in the latter vary in 

 length and breadth ; specimens from the North Atlantic have, for the 

 most part, shorter and broader frustules. 



Lat. 59° 10' N., long. 50° 25' AV., 1750 fathoms. 



One Diatom only, viz. Coscinodiscus radiatiis, Ehb. 



Also various Polycystina, Eoraminifera, and spicules of Sponges. 



Surface-drift. Lat. 59° 36' N,, long. 39° 10' ^Y. 

 A tufted Diatom, ^iz. Podosj^henia elongata, Ktz. 



Station No. 13. Lat. 55° 58' N"., long. 31° 41' W., 1230 fathoms. Fine 

 adhesive mud, bluish when moist, dirty white when dry. 



Diatomaceae : Coscinodiscus rcidiatus, Ehrb. ; C. lineatus, Ehrb. ; C. 

 minor, Ehrb. ; Amjphora granulata, Greg. : Sgnedra Jeffrey si, n. sp. 



Along with these, two Polycystina {Bictyoclia fibula, Ehrb., P. gracilis, 

 Ehrb.), with fragments of a Eotalia and sponge-spicules. 



Twenty grains of this mud, partly soluble T^ith effervescence in acid, 

 left a residue which, when washed and dried, w^eighed 14 grains. 



Lat. 55° 38' N., long. 28° 42' W., 1485 fathoms. A fine 

 dirty- white mud. 

 Diatomaceae : Coscinodiscus radiatus, Ehrb. ; C. minor, Ehrb. 

 Also fine siliceous particles, fragments of sponge-spicules, and nume- 

 rous Coccoliths. 



Twenty grains, partly soluble with effervescence in acid, left a residue 

 which, after bemg washed and dried, weighed 12 grains. 



Lat. 62° 6' N., long. 55° 56' W., 1350 fathoms. A grey mud, 

 very adhesive. 



Diatomaceae : Coscinodiscus radiatus, Ehrb. ; C. minor, Ehrb. Eorami- 

 nifera : Rotalia glohosa. 



Also fragments of sponge-spicules and numerous Coccoliths. 



