NOTES ON ATLANTIC DIATOMACEX 277 
Ehrenb., Actinocyclus subcrassus Rattr., Asteromphalus flabellatus 
ev., Paralia suleata, Cyclotella striata Grun., Thalassiothri« 
Nitzschioides Van Heurck, T. longissima, Niteschia producta, an 
Fragilaria Nitzschioides. 
No. 46.—Near Colon. R. alata, R. styliformis, R. calcar-avis, 
R. robusta Norm., " Gusher Blavyana, G. flaccida, C. borealis, C. 
Lorenzianus, C. dista ans var. secunda, C, didymus Cl. var. ap dete 
C. affinis ier Lauderi, C. Pane CG pelagicus, C. atlanticus, C. furcel- 
latus, Cuthinron ertophilus, B, var mre tay iaulus peaesnirien iH; 
auckii, Coscinodiscus nodulifer, C. era C. pense C. radiatus 
Ehrenb., Fitiow nocyclus subordssils, Astoronsphalus flabellatus, Cyclotella 
striata, Ditylum undulatum Schm., alassiothrix longissima, T. 
Fi raed, hewn producta, Asterionella Bleakleii Smith, Fragi- 
lar schioides, ? Navicula pelagica Cl., and Spermatogonia 
- These s 
diatoms in quantity, if not always in varie ty, it is inceeniige+ to 
observe, come from localities near coasts, viz.:—No. 18 within a 
day’s steaming south St. Michaels, Azores; No. 28 within thirty- 
six hours of making Barbados; Nos. 80 and 31 within twelve hours 
; N b 
are there any records like these r mies ‘from coastal waters, and 
the ties increase of a tity of dintihat in the nets seems to be, 
as e, the sign of approaching land. In this respect wre 
misroreope might be claimed as an aid to navigation in the sam 
Ww rof. Herdman has pointed out (from a study of the animal 
plankton) that it is = —, to determine the passage from 
Gulf Stream to the ent subsequent voyages the 
gatherings obtained by ‘Capt. ‘Milner near Colon show the persis- 
, events from July to December, of the same rich diatom 
Mr. Crasiledt, who furnished us with the lists of the seven tubes, 
kindly supplied the following Bey ee of a new species noted: ois 
Valve linear-lanceolate = 
t 
ronteaeire elongated p 7 
rows being alternate ij ae ‘other, 0 a8 to form cig rows. : 
Keel puncta marginal, 9 in ‘01 mm., rather inconspicuou : 
2 Boealiss. Atlante Pla Plankton, lat. 14° 58’ N. to long. 7 26’ W. 3. 
and West Indi 
Belongs to : Panduriformes, but is not anes: 
