Fig. 
. Lyman, 1882. “Challenger” Reports, v, Ophiuroidea, p. 272 
115 
> 
pl. xxu, figs. 5-7. 
. Mortensen, 1903. Danish “ Ingolf ”? Expedition. 
. Muller and Troschel, 1842. System der Asteriden. 
. Perrier, 1894. Exped. du “ Travailleur” et du ‘ Talisman” : 
Kchinoidea, p. 244. 
. Sladen, 1889. ‘‘ Challenger” Reports, xxx, Asteroidea. 
. Thomson, 1874. Phil. Trans., p. 726. 
. Verrill, 1867. Trans. Connecticut Acad. (reprinted in Trans. N.Z. 
Inst., xu, 1879, p. 278). 
EXPLANATION OF PLATES. 
Prate VII. 
Mediaster sladeni Benham. 
1. Outline of entire animal (x4). Only a portion of an arm is filled in. 
. 2. Upper surface of a portion of the arm (x 2). 
. 3. One of the paxilliform plates (x 4). 
. 4. Under-surface of a portion of an arm (x2), showing the adambulacrals 
of one side of the groove, and the neighbouring ossicles. 
5. An oral angle ( x 4). 
Puate VIII. 
Echinaster farquhari Benham. 
. 1.,Entire animal (natural size); details shown only in part of the arm.. 
. 2. A portion of the upper surface of an arm about midway along its length 
(x 2). 
g. 3. Under-surface of the distal region of an arm (x2). A little more than 
half of the diameter is shown; unfortunately, the relative sizes of the 
adambulacral spines are not accurately drawn. 0, c, d, rows of spines. 
(Cf. fig. 4.) 
. 4. Outline of a transverse section of an arm, showing the disposition of the 
spines on the longitudinal ridges. a, b, c, d, the four rows of spines 
along the arm. 
Pentagonaster abnormalis Gray. 
5. The adambulacral ossicles and neighbouring region (x4). The spines 
have been removed from two of the ossicles, the articular cups being 
shown. A pedicellaria is carried in the slit-like furrow of one of the 
abactinal plates. 
PLATE IX. 
Astrotoma waiter Benham. 
ig. 1. Entire’animal (natural size), with three arms cut short. 
. 2. Portion of the upper surface (x 2). 
