276 THE JOURNAL OF BOTANY 
great quantity as compare with Peridiniee, &c., but in one form 
or other never abse 
The facies of - phyto-plankton flora changed, however, on 
approaching land, and while this is Generally true . i: the voyages, 
it was especially marked and striking to n the voyage we accom- 
panied. This — be best illustrated 33 ae Sollowinie fact. On 
our return seven gatherings were selected, on account of their 
abundant Eaten contents, eae be ahmed to the late oe Thomas 
Comber for a determination. They were as follow. 
No. 18.—Para, Voyage III. Lat. 85° 47’ N.; long. 98° 87’ W. 
Rhizosolenia alata Brightw., R. setigera Brightw ya) ae borealis 
Bail., Coscinodiscus gy Bail., Thalassiothrix “Prauenfeldii Grun., 
and T. longissima Van Heure. 
No. 28.—Lat. 17° 58’ N.; ‘long. 58° 32’ Ww. Rhizosolenia alata, 
R. setigera, R. styliformis, Chatoceros borealis, C. Lorenzianus Grun 
C. decipiens Cl., Bacteriastrum varians Laud., Guinardia flaccida 
Per , Hemiaulus. Hauckit Grun., H. membranaceus Cl., Coscinodiscus 
nodulifer Jan., C. crassus Bail., Hemidiscus cuneiformis Wall., Astero- 
lampra Marylandica Ehrenb., Pseudoeunotia good Grun., Fragi- 
laria dubia Grun., F. Niteschioides Grun., and S ogonia antiqua 
Brun. Cat this last is not a diatom, Bist vey so reckoned.) 
No. 5’ N.; long. 57° 26’ W. BR. styliformis, 
R. Stotterfothit Per., Guinardia flaccida, C. bor salen 6. Lorenzianus, 
C. decipiens, C. coar retatum Laud., RE abi emiaulus 
membranaceus, Coseinodiscus nodulifer, C. Kutz ss var. ips A (new 
voy with a marginal pseudo- nodule, as in Actinocyclus), Hemt- 
discu , Fragilaria Nitzschioides, 
Siphatephors rostrata Wall., Tropidonsis antarctica Cl., Hucocconeis 
crac ~ and Spermatogonia 
enzianus, B. vavians, 
Hemiaulus membranaceus, Coscinodiscus nodulifer, Asterolampra Mary- 
landica, F', Nitzschioides, Nitzschia producta n. sp., and Spermatogonia 
antiqua. 
No. 36.—Lat. 16° 6’ N.; long. 68° 10’ W. _Rhizosolenia indica, 
R. alata, R. rigida Per., R. ‘styliforwic, R. setigera, R. Me therium, 
n. sp., Chetoceros borealis, C. decipiens, C. Lorenzianus, Climacodium 
Frauenfeldianum Grun., Coscinodiscus nodulifer, ~ Kutzingit var. 
ocellata, Asterolampra May ‘ylandica, and Fragilaria Nors.— With 
reference to the abundance of species of Fhisontenia is this place, 
we subsequently found (voyage of ‘ Atrato,’ lat. 8° N., long. 
68°-75° W., 1-2 December) a vast shoal of Vikdeveolonia, “principally 
R. styliformis, extending apparently for three hundred knots towards 
the coast of Hayti on this part of the track. 
No, 45.—Near Colon. R. ~~ R. styliformis, R. calcar-avis 
ee diotane OL Blavyana Per., Cheto 
anus tstans Cl. var. secu 
Fort. 
