149 
low in the point and the whole vibratiie band is of a faint yellow- 
ish tint. 
It is perhaps possible to find out to which Asteroid this larva 
belongs. The Asteroids occurring in the neigbourhood of the Stat¬ 
ion are the following: Astropecten irregulctris , Luidia Sarsi , Hipp- 
asteria phrygiana, Porania pul- 
villas , Solaster papposus, S. endeca , 
Hertricia sanguinolenta , Stichaster 
rosens , Asterias Mulleri, glaeialis 
and rubens. Of these are at once 
out of question: the three Asterias 
species, Henricia , the two Solaster 
species, Porania and Luidia. Hipp- 
asteria has large and yolk- laden 
eggs, so that it can be said with 
certainty that it has no true Bipin- 
naria larva. There are thus left 
only Astropecten irregularis and 
Stichaster roseus. So far as evid- 
ence goes the Astropecten larva 
Fig 3. Bipinnaria of Stichaster 
belongs to the type of Bipinnariæ 1 roseus (?) «>/i. 
with quite short, not contractile pro¬ 
cesses. (I have tried to rear the larva but never succeeded in 
getting suitable material for fertilization). There would then ap- 
pear to be no other alternative than that we have here the 
larva of Stichaster roseus. My efforts to try to rear the 
larva of this species from the egg were in vain, 1 ) as I could never 
get sufficient material of the species, only now and then a single 
specimen. But at any rate I could ascertain that it has its breed- 
ing season at this time (August). 
Although thus everything seems to point towards Stichaster 
roseus as the parent species of this larva, nothing definitely can 
be said about it at present. The rearing of the Astropecten irre¬ 
gularis larva would also settie this question. 
« 
James F. Gem miil has succeeded in rearing the larva from the egg 
till the young Bipinnaria stage. (Notes on the development of the star- 
fishes Asterias glacialis O. F. M.; Cribrella oculata (Linck) Forbes; 
Solaster endeca (Retzius) Forbes; Stichaster roseus (O. F. M.) Sars. 
Proc. Zool. Soc. London 1916. p. 562.) 
