110 



give a more detailed description of tlie species of Pendimm which oc- 

 cur on the coasts of Norway, but as this work is, as yet, only in its 

 beginning, I have tried as far as possible to use the accepted names, 

 even if I do not always agree with them. 



Common, often in quantities, except during the spring diatom 

 inflow, when it is rather rare and scarce. Gban found it at several 

 places on the northern coasts of Norway in the months of July- 

 October 1898—99. 



Distrihution : According to Cleve, this is a southern, oceanic 

 form, widely distributed in the warmer part of the temperate At- 

 lantic, northwards to Iceland, Scotland, the North Sea, Skagerack, 

 Cattegat, the west coast of Norway and (sometimes) I'ight up to 

 Spitzbergen. 



It is stationary on the whole of the coast of Norway, and 

 especially on the west coast frequent in the summer and autumn. 



P. conicum (Gran) Ostenf. et Schm. 



OsTENF. at ScHM. L. 117, p. 174. Gkan L. 70, p. 189, f. 14. 

 P. divergens var. conica Gran L. 67, p. 47. P. lenticulare v. 

 Michaelis (Eheb.) Joeg. L. 91, p. 37. 



Undoubtedly a good species. 



Occurs in rather a large number of the samples, but quite 

 exceptionally in any quantity. Gban found it in the Eids Fiord 

 (Nordland) in rather small numbers in the months of July — August 

 and October 1898—99. 



Distribution : Gkan (L. 70, p. 190) considers it to be a tem- 

 l)erate Atlantic oceanic form, which also seems to agree to my 

 material. On the west coast of Norway it is found all the year 

 round, but generally only in small numbers. Found in the English 

 Channel (February and May 1903), off Scotland, in the North Sea, 

 the Skagerack and Cattegat and the Baltic, as well off Beeren 

 Eiland (very sparsely). 



P. pentagonuiu Gran. 



Gran L. 70, p. 191, f. 15. 



1 know this form very well from the west coast of Norway, 

 where it occasionally is abundant, but I have been in some doubt 

 as to whether it should be looked upon as a young, undeveloped 

 form or a special species. 



Occurs rarely and in small numbers, but is possibly overlooked. 



Distrihution: Not sufficiently known. Gran is probably right 

 in considering it to be a northern form. In 1898, it was occasion- 

 ally abundant on the west coast of Norway. 



P. pallidum Ostknf. 



Ostenf. L. Ill, p. «(i; L. IKi, p. 581, 582, f 130. 131. 



P. pelhicidum (Bergh) Jorg. L. 91, p. 38. Gran L. 70, p. 186. 



I agree with Ostenfeld in considering this species to be dif- 

 ferent from the following one but not with respect to the use of 

 the name P. pellurAdum (Bergh). As it is, however, excellently 

 described by Ostenfeld (]. c), it will be most practicable for the 

 present to use the names he does. 



Rather frequent, but generally in small nunibei's. Found by 

 Gran at many places on the northern coast of Norway in the 

 months of July— October 1898—99, but only in small numbers. 



Distrihution: Arctic and boreal (properly neritic?) species, 

 known from the North Sea (from The English Channel, frequent 

 in May 1903), Skagerack and Cattegat, the west coast of Norway, 



Scotland, the Faeroe Islands, Iceland, Greenland, Jan ^Mayen and 

 Spitzbergen. Stationary on the west coast of Norway, especially 

 numerous in the summer months. 



p. pelluciduiu Ostenp. 



OsTENF. L. 116, p. 58, f. 129. 



There are several species which are more or less allied, whicii 

 may easily be confused with this form. Besides, on account of its 

 minuteness, it easily, passes through the net, and is therefoi-e not 

 specially tabulated. 



It was, however, only occasionally found in the samples. 



Distrihution: Seems to be an arctic and northern temperate 

 (boreal) species, which is by Ostenfeld considered to be neritic. 

 According to Cleve L. 40, p. 268, it has been found at many 

 places on the American side up to Greenland and Spitzbergen. 

 Occurs also on the west coast of Norway (in April and May 1901). 



P. pedimctilatum Schutt. 

 (PI. VIII, Hg. 29). 



Shape: In dorsal view the upper half is broadly conical, with 

 a rather long cylindrical apical tube. The lower half is broadly 

 conical, the outlines showing a shallow sinus on each side and at 

 the lowest part. In side view the upper half is still conical, the 

 outlines of the lower being rounded, and then evenly narrowed, 

 most clearly on the posterior side, towards a broad, rounded lower 

 part. The dorsal half is larger and more prominent than the ven- 

 tral. The excurrent basal spines are somewhat nearer the ven- 

 tral side. 



Girdle: The girdle in side view is almost in right angle to 

 the longitudinal axis. On the venti-al side the left end lies lower 

 than the right, about as much as a piece equal to the height of the 

 girdle. Definite radial rays (thickenings). 



Basal spines: The basal spines are directed somewhat for- 

 wardly (towards the ventral side), especially the left one. Both 

 broadly alated, the ventral wing being all at once broader towards 

 the base, so that its contour turns almost at right angles to the 

 direction of the spine (as is the case in Podolampas palmipes). In 

 this way, in certain positions, the species appeai-s to have a short, 

 broad winged „foot" between the two others. 



Contents of cell: The same in colour as in P. pidlidum. 



Dimensions: Width 47 ii, heiglit 51 [i.. liasal spines 17 |i. 

 prominent. 



As yet, I have only seen few specimens of this species. Nei- 

 ther am I sure that it is identical to Schutt's, so that I have 

 given a description, which, howevci', should only be taken as a 

 preliminary one. 



The peculiar suddenly broadened wings at the base of the ven- 

 tral side of the basal spines are only seen with difficulty, but tlie 

 one which belongs to the left spine is easily seen when the spe- 

 cies lies on its ventral side with .the apical tube down (and the 

 spines up). As far as I have been able to see this wing on the 

 left spine is du-ected out towards the right, on the right one, on 

 the contrary, but little to the left, almost forwardly (ventrally). 



The long apical tube has a vei'y characteristic form in Schutt's 

 figure. '^Phis form is also found in my specimens, but is due to 

 seams, not to the actual contour. 



It may be a question as to whctlicr my specimens belong to 

 P. tristylum Stein, a species wlucli 1 do not know, but which, at 



