REPORT ON THE ASTEROIDEA. 215 
mm., have fully developed spines on all the supero-marginal plates, excepting the second 
and third, and are quite recognisable specifically. 
Liitken* has also supported the view of the independence of the species by giving a 
description of a much larger example than that discovered by von Martens. 
13. Astropecten granulatus, Miller and Troschel (Pl. XXXY. figs. 3 and 4; Pl. 
XXXIX. figs. 4-6). 
Astropecten granulatus, Miiller and Troschel, 1842, System der Asteriden, p. 75. 
Locality.—Station 188. In the Arafura Sea, between Cape York and Frederick 
Henry Island. September 10,1874. Lat. 9° 59’ 0” S., long. 139° 42’ 0” BE. Depth 
28 fathoms. Green mud. Surface temperature 78°°5 Fahr. 
Remarks.—Although I have had the opportunity, through the kindness of Professor 
Schlegel and Dr Jentinck, of comparing Miiller and Troschel’s original type-specimens of 
Astropecten granulatus, from the Leyden Museum, side by side with the single example 
obtained by the Challenger, it is not without some hesitation that I refer the latter to 
that species. It is, however, without any doubt most nearly related to that form, and as 
the differences are very slight, and appear to me quite of secondary character, such as 
might in great measure be accounted for by differences of locality, I have considered it 
preferable, owing to the scantiness of the material, to refer the specimen under notice 
directly to Miiller and Troschel’s Astropecten granulatus. The adoption of that course is 
further warranted by the fact that so far as I am aware no other examples except the 
types are known to exist, and their locality is unknown. 
The type-form is well and accurately described by Miiller and Troschel, with the 
exception of the statement that the supero-marginal plates bear small spines: “Die 
dorsalen Randplatten sind héher als breit, in den Winkeln der Arme sehr hoch, tragen 
kleine Stacheln und sind iiberall grob granulirt.” ® 
No spines or even rudiments of spines exist, or have existed, upon the supero-marginal 
plates of the type-specimens, which are well preserved, and are literally “ itberall grob granu- 
lirt.” I would venture to suggest that in the passage quoted above, the word “kleine” 
is a misprint for “keine.” With this amendment the diagnosis would stand correct. 
The Challenger specimen, which is smaller than either of the types, differs in 
having rather shorter and broader rays; and the supero-marginal plates are plane or 
nearly so abactinally, whilst in the type they have a decidedly tumid appearance. 
It may further be noticed that these differences are probably greatly emphasised by the 
fact that the type-specimens are dried and considerably shrunk, whilst the specimen under 
notice is in spirit and well preserved. In the Challenger example the armature of the 
1 Videnskab. Medd. naturh. Foren. i Kj¢benhavn, 1871, p. 237. 
* System der Asteriden, p. 75. 
