On a New Brachiate Asteroid Larva. 193 
OTHER DESCRIBED BRACHIOLARIZ WITH INDIRECT DEVELOPMENT. 
1. Brachiolaria of Asterias rubens.—Brachia truncated, extremities carrying 
six to ten papille; sucker a round disc; two papilla to each side of sucker ; 
no papilla on sides of arms; ciliated processes cylindrical (Mortensen 27, 
p. 42; Gemmill 6, pp. 235-237). The Bipinnaria levis of Mortensen 
. (21, p. 43), a larva described by Joh. Miiller (24, 1848), in which the dorsal 
median process is absent, and there is sometimes a clump of papille on each 
side of the sucker, has been shown by me to be a variant form of the brachio- 
laria of A. rubens (see 6, p. 236). 
2. Brachiolaria of Asterias vulgaris.—Practically same as that of A. rubens 
(Agassiz J, pls. ii. and iv., but see also 6, p. 237). 
3. Brachiolaria of A. glacialis—Brachia markedly convex or bulbar at the 
extremities, each of which carries about fifteen separate papille; a circle of 
about fourteen small papille surrounding the sucker (Delage 3, pp. 36, 37). 
4, Brachiolaria of Porania pulvillus.—Brachia convex at extremities ; 
papillz on extremities as well as on sides of brachia. Sucker, a round disc, 
with a row of about fifteen papille on each side of it extending between the 
median and the lateral brachia; dorsal median process reduced (Gemmill 7). 
5. Bipinnaria papillata, Mortensen (21, p. 44) founded on Joh. Miiller’s 
description and figures (24, 1853, Taf. ix. figs. 9-12, Brachiolaria of Messina).— 
The parent form is unidentified. This brachiolaria has the ventral aspects of 
the brachia flattened and carrying nine or ten papilla. The ends of the 
brachia are convex and carry several papille. There are also papille on each 
side of the sucker. The dorsal median process is well developed. 
6. Reference may also be made to the unidentified Bipinnaria megaloba of 
Mortensen from the Sargasso Sea (21, p. 44). All the paired ciliated processes 
are broad and very long, almost as long as the body itself. The brachia were 
not fully developed in the specimen described, so that their final characters 
are unknown. 
The principal attaching larvee exhibiting direct development, with which 
we are acquainted at present, are Cribrella oculata (Sars 27, Masterman 19) ; 
Asterias miller, (Sars 27); Asterina gibbosa (Ludwig 13, MacBride 16); 
Sp. unk. (Henderson 9); and Solaster (Gemmill 5). References to various 
other star-fish with yolky eggs and abbreviated development are given by 
Ludwig (75), Perrier (25), MacBride and Simpson (/7), and Koehler (/7), and 
Mortensen (23a). 
Il. The late larva of Luidia ciliaris. 
In the next part of this paper is given for the first time a figure of the 
advanced bipinnaria of Z. ciliaris, together with details regarding the number 
