314 
living in the same localities. The faet that their eggs are small, 
transparent and very numerous indicates that they do not protect 
their brood, but have a typical pelagic larva. 
The species having never been figured, I think it desirable to 
give some figures of it. Also a few additional remarks may be 
Figs. 17—18. Stichaster australis. Pedicellariæ. 
17. Valves of crossed pedicellariæ, in side (a) and front view (b). 18. Straight pedi¬ 
cellariæ, in outline. a. whole pedicellaria, showing the closing muscles; b. valve, 
seen from the inside; c. valve of a small form, seen from inside. 
Fig. 17 loo/i; Fig. 18 
given to Verrill’s description, which, otherwise, is so careful as 
to leave little to be desired. 
The arms vary in number from 10—13, the number 11 or 
12 being the more common; only one specimen was found to 
have 13 arms. In the younger specimens the arms are rather 
cylindrical, only slightly tapering; only in the larger specimens 
they can be said to be inflated (probably on account of the 
genital organs, when these contain ripe sexual products). The 
largest specimen which I have seen (a dried specimen in poor 
condition from Kawhia) measures 24 cm in diameter (Verrill’s 
type specimen was 29 cm in diameter). The relation between R 
and r varies from ca. 2—2.4. The larger spines of the inframarginal 
plates are stated by Verri 11 to be arranged in a single row; I 
find this serial arrangement rather indistinet. His statement that 
these spines are mueh larger than the interambulacral (= ad- 
ambulacral) ones is to be thus understood that they are thicker 
than these latter, while they are considerably shorter. 
The crossed pedicellariæ (Figs. 17.a—b) are interesting in having 
