REPORT ON THE ASTEROIDEA. 207 
the margin of the ray; and occasionally there may be one or two supplementary spinelets, 
usually smaller and almost indistinguishable from the spinelets of the infero-marginal 
plates, but occasionally one is as large as the three spinelets of the outer series, and is 
irregular in position. 
The mouth-plates are small, and form a prominent narrow keel along the median suture- 
line, on each side of which are borne two rows of rather elongate cylindrical spinelets, six 
or seven in each, and two or three in single series on the outer part, which are larger. 
The innermost spinelets are more robust than the others, but only very slightly longer, 
and no prominent horizontal comb is formed over the mouth-opening as in other species. 
There is a row of five to seven rather elongate spinelets on the free margin of the mouth- 
plate. 
The madreporiform body, which is small and almost hidden by paxille, is situated 
rather more than its own breadth from the margin. 
The ambulacral tube-feet are moderately robust and have conical pointed tips. 
The terminal (ocular) plate is rather large, and broader than long; distinctly appear- 
ing as if formed by the lateral union of two semicylindrical plates, with a rather large 
tubercular granule on each side at the extreme tip, on which spinelets were probably 
articulated. 
Colour in alcohol, yellowish grey, with a darker tint over the paxillar area approach- 
ing greenish grey. 
Locality.—Station 204. Off Tablas Island (Philippine group). November 2, 1874. 
Lat. 12° 43’ 0” N., long. 122° 9’ 0” E. Depth 100 fathoms. Green mud. Surface 
temperature 84°:0 Fahr. 
Remarks.—This form is distinguished from the other species possessing a non- 
continuous series of spines on the supero-marginal plates by the absence of the spines 
in question on the outer half of the ray, and by the presence of the oblique series or comb 
of lateral spines on the infero-marginal plates. 
8. Astropecten hermatophilus, Sladen (Pl. XX XIII. figs. 5 and 6; PI. XXXVIT. figs. 
7-9). 
Astropecten hermatophilus, Sladen, 1883, Journ. Linn. Soe. Lond. (Zool.), vol. xvii. p. 257. 
Rays five R=25 mm.; r=8 mm. R>38r._ Breadth of a ray at the base, 
8°5 mm. 
Rays of moderate breadth, tapering from the base to the extremity, but not becoming 
attenuate or sharply pointed. Interbrachial ares slightly rounded. 
The paxillar area is compact and uniform, rather more than three times the breadth of 
the supero-marginal plates at the middle of the ray. The paxillz are longer on the disk 
and along the median abactinal line than at the sides of the rays, where they are arranged in 
