80 IOWA STUDIES IN NATURAL HISTORY 
straight rows in each ambulacral area; the ampulle are leaf-like. 
No pedicellariz can be seen. There is a single, very flat, round 
madreporic body. The autotomous species of this genus, such as 
Linckia guildingit found in the West Indies, have more than one 
madreporic body. 
A gmall specimen, grayish in color, with a relatively large disk 
and short triangular arms, was found on the tide flats. It has a 
conspicuous row of marginal plates representing the upper mar- 
ginals, but the inferior marginals seem to be lacking. The upper 
series bear conspicuous triangular spines and there is a row of 
short pointed spines covering the ambulacral groove. Beneath 
these, as viewed from above, other rows of fine spinelets are found. 
The thin, fragile dorsal plates are regularly arranged, while the 
madreporic body is inconspicuous and pedicellarie appear to be 
absent. This form greatly resembles Gymnasteria carimfera as 
figured by Sladen.® He names the Fiji Islands as one of the 
localities from which this species is reported and states that it 
has been found on the reefs there. 
I find in my notes the mention of a ‘‘fine sessile crinoid with 
arms barred brown and white.’’ This is the only crinoid we saw 
while at Fiji, and it so disintegrated in the preservative used 
(formalin) that I will leave it for description by a specialist when 
the scientific results of the expedition are worked out. Of course 
many other echinoderms have been passed over without mention, 
as this narrative presents merely a cursory view of things that 
strike the author as having particular interest. 
WORMS 
This term is used in the old sense to include all worm-like forms, 
such as leeches and nemertines, as well as the annelids proper. 
The representatives of this heterogeneous group found on Maku- 
luva are not numerous and do not compare in variety with those 
secured by the Barbados-Antigua Expedition of 1918. This is 
due in part to the difficulty of breaking up the flinty reef-rock 
in order to expose the forms hidden in the deeper recesses. 
Among the Polychexta is Leodice longicirrata.° This specimen 
is the longest true annelid I have ever seen, the preserved spec- 
9 Asteroidea of the Challenger Expedition, pl. LIT, figs. 5-8. 
10 Miss Catharine Mullin of the Department of Zoology in the State Uni- 
versity of Iowa has been good enough to identify approximately the forms 
here mentioned. 
