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of being hermaphroditic, as the author has shown nearly all 
viviparous Ophiurids to be.^) It was found to have one testis at 
the adradial side and one ovary at the interradial side of each 
genital slit. The eggs are fairly large, ca. 0,3 mm, full of yolk. 
The two specimens were found together with, and under the 
same conditions as Åmphipholis squamata, and may well be sup- 
posed to be of not rare occurrence in such localities as those, where 
the latter species is found. 
This species appears to be nearly related to the Australian 
Amphiura constricta Lym., from which it differs, however, besides 
c. b, 
Fig. 25. Amphiura anniilifera Mrtsn. a. Part of oral side, b, of dorsal side ; c. three 
annjoints from middle part of arm, dorsal side, 22 /,. 
in some minor details (tentacle scales larger, more elongate, dorsal 
armplates som.ewhat shorter and broader, radial shields somewhat 
more elongare in A. constricta) in the anatomical relations of the 
genital organs, A. constricta having both ovary and testis on the 
same, interradial side of the genital slit. 
Also, to the antarctic Amphiura algida Koehler the present spec¬ 
ies shows a considerable resemblance, but still differs so much from 
it in various minor points that their specific identity is out of 
question. It is unknown whether A. algida is also viviparous. 
Th. M o r t e ns e n. On hermaphroditism in viviparous Ophiurids. Acta 
Zoologica. I. 1920. 
