. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 582 figures of both species; but the following measurements will per- haps better show the difference: — Breadth Thickness 45 fi 35 p 70 (i 45 \i Length P. pellucidiim about 55 n P. pallidum — 80 n. The relation between the breadth and thickness is especially very different, but they also differ as regards their whole appear- ance and the plan of their transversal fissure, which is nearly at right- angles with the longitu- dinal axis in P. pelluci- diim, but very oblique in P. pallidum. It is a boreal, oceanic
. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 582 figures of both species; but the following measurements will per- haps better show the difference: — Breadth Thickness 45 fi 35 p 70 (i 45 \i Length P. pellucidiim about 55 n P. pallidum — 80 n. The relation between the breadth and thickness is especially very different, but they also differ as regards their whole appear- ance and the plan of their transversal fissure, which is nearly at right- angles with the longitu- dinal axis in P. pelluci- diim, but very oblique in P. pallidum. It is a boreal, oceanic species, which is rather rare around the Færoes. [See tables.] 74. P. Steinii J6rg., 1. c. p. 38; P. Michaelis Stein, 1. c, PI. 9, figs. 9 —14; non Ehbg. Temperate, oceanic species, very rare around the Færoes (found three times in July). 75. P. globulus Stein, 1. c, PI. 9, figs. 5—8. As the above, found only once in February. Fig. 131. Peridinium pallidum Ostf., a specimen from the North Atlantic Ocean; the same cell in different views (200/i). Sungen. 2, EUPERIDINIUM Gran. 70. P. conicum (Gran) Ostenfeld & Schmidt, Vid. Medd. Nath. For., 1901, p. 174: Gran, Das Plankton des Norw. Nordmeeres, 1902, p. 189, lig. 14; P. divergens, var. conica Gran, Rep. on the Nor- weg. Fishery and Marine Investigations, Vol. I, 1900, No. 5, p. 47; P. divergens, var. Michaelis Jorg., 1. c. p. 37. This species has not been distinguished from the following in most of the samples; I am inclined to think thai it is not rare in the plank- ton around the Færoes, but I have noticcd il only in some samples ol' 1900 (March and July) and 1902 (August). Gran describes il lullv in his last treatise on plankton and gives figures of it; he also describes an allied species, viz. P. pentagonum which I do not know. 77. P. divergens Ehbg.; P. lenliculare (Ehbg.) Jorg., 1. c. p. 37. Occurs not infrequently in the planklon, hul not in any greal qua n ti ty, found in January, March, July December. A
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