KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 59. NIO 4. 11 



P.j (at Br 2) 13 (St. 8) — 16 (St. 11), 5,5— 8 mm. The segments (except the most 

 distal) a little longer than they are broad, smooth. The 9 proximal ones with 3 

 edges. The outermost segments with the distal borders somewhat produced. Some- 

 thing similar at V, and P 3 also. 



P 2 (on Bro) 13 (St. 8)— 19 (St. 11), 7 — 10,5 mm. First segment short, rather 

 square. The 3 d and 4 th segments the longest. Second to 6 th triangulär, otherwise 

 like P,. P 3 (on Br 7) 13 — 17, 7—9 mm; P 10 16, 5,5 mm; P,_. 18, 7,5 mm; P 75 23, 

 9 mm. The first two segments of the distal pinnules bulbously swollen. From the 9 th 

 segment there are long, slender ossicles. P a (on Br 4) 15, 7 mm, corresponding to 

 P,; P b (on Br6) 17, 9 mm. 



Colour in the living animal dark red or, according to other information, bluish 

 violet, the dorsal side of the arms and pinnules and in the exteriör half the ventral 

 side also påle yellow (= the regenerated part). Compare fig 5 on the plate. 



I give below a eontribution to the variability in the C:i and the P. The 

 figures in brackets indicate at which segment the dorsal spine begins. I = inner 

 (dorsal) row; E = external (ventral) row. 



Station 6: C XXIX I: 28 (very young, without dorsal spines), 28 (19), 30 

 (young regenerating), 31 (12). I-E: 30 (12). E: 30 (11), 30 (very young, 3 mm), 32, 

 33(12), 33 (youngK 35 (12). 



Arms 10, 120 mm — P L 15, 7.5 mm; P 2 16, 9 mm; P 3 16, 9 mm; P 4 15, 7,5 

 mm; P J5 15, 7 mm. — P a 14, 6 mm; P,, 13, 8 mm; P c 15, 8 mm. Distal pinnules 

 20, 9 mm. A påle coloured specimen. 



Station 8: C XXIII I: 29 (14), 28 (13), 28 (11), 27 (17), 27 (13), 27 (17), 26 (13). 

 E: 27 (very young, regenerate), 29 (17), 29 (18), 31 (16), 31 (19), 35 (21). 



Arms 10, 75 mm. Segments smooth, proximally a little rugged. The 4 first 

 Br:s a little flattened inside. First I Br:s like first Br:s but partly fused. — P x 13, 

 5,5 mm; P_, 13 — 14, 7 mm; P 3 13 of about the same length; P 4 12—14, 6— > 6 mm. 

 — P a 11, 4,5 mm; P b 12, 6,5 mm; P c 13, 8 mm. Distal pinnules 16—17, 6.5 mm. 

 The segments short. Basal ones never, distal segments somewhat, longer than they 

 are broad. The former coarse and thick, the latter, especially at P G , slender and 

 thin. 



Station 11: C XXIV 1:27 (10), 28 (11), 31 (11), 31 (11), 34 (12). I-E: 28 

 (very young), 35 (16). E: 32, 32 (young), 32 (31! young), 36 (15, old), 37 (16), 38. 



Arms 10, 120 mm. Sharp transition (at some syzygies) to the paler coloured 

 exteriör parts of the arms. Distal pinnules 21—22, 9.5 mm. 



In connection with this species I wish to examine somewhat more closely how 

 far some proximal Amphimetra species can be considered to be related. Already in 

 1914 A. Reichensperger emphasized the close relation between A. milberti and 

 discoidea. As a conclusion of his investigations he considered he could make the 

 following statement about both the species: »dass man wohl kaum von zwei Arten, 

 höchstens von lokalen Varietäten reden känn», and below: Wenn ich trotzdem 

 discoidea hier von milberti getrennt halte, so geschiet es nur um die zeitige Verwir- 

 rung ... in der S} r stematik nicht zu vermehren. » I entirely agree with his opinion 



