18 R. KIRKPATRICK. 
Specimen B is 27 cm. in height and 32°5 em. in diameter ; the colour is now dark 
brown, but Mr. Hodgson states that it was pale yellow when captured; many of the 
conules form large, thick, thumb-like projections. 
The larger of the two smallest specimens (II. 3) is 3 cm. in height and 2°2 em. in 
width, the total height and length, including the pleuralia, being 7 em. Mr. Hodgson 
informs me that, on one occasion, he hauled up from 228 m. (125 fms.), No. 6 hole, 
a huge specimen, apparently of this species, 2 feet in height and 18 inches in diameter, 
but in spite of desperate efforts to secure it, resulting in his arms becoming like a 
pincushion, the specimen fell back into the water and was lost. 
The dermal surface shows a fine network in which larger and deeper meshes 
formed by strands of hypodermal diactins are filled in by much finer square meshes 
formed by the autodermal pentactins. 
The gastral membrane (VI. 8) is smooth and shows sieve-like groups of small 
orifices, which are much larger than those of A. pilosa. The membrane is supported by 
bundles of hypogastral diactins which form a network with large meshes ; usually in 
each mesh there is one large oval orifice, *5 to 1 mm. in long diameter, with a sharply- 
defined thin membranous edge. The sieve-like groups of orifices are separated from 
each other by unperforated areas or zones, which are sometimes of considerable extent 
in the upper part of the central cavity. 
Skeleton. The skeletal framework is constructed of bundles of diactins, and of 
large regular hexactins, which latter are especially abundant in specimen B. 
Spicules. The diactin principalia are very long and have their ends either 
rough or smooth, and sharply pointed (more so than those of A. pilosa). The regular 
hexactins (VI. 3a) have thick rays each 960 x 90u, smooth or rough at the ends; 
many of these spicules are abnormal in having their “ paratangential” rays curved and 
bent away from the normal plane like the ribs of an umbrella. 
The pleuralia are usually diactins; a few anchor pentactins occur in the larger, 
but many in the smaller specimens. 
The basalia are pentactins, which attain a length of 10 em. (VL 3b), and have 
very stout prongs, 125 in thickness at the base. 
The autodermalia (VI. 3d) are pentactins, with wholly spined rays; each 
tangential ray, 113 x 17p, tapers slightly. 
The hypodermal oxypentactins (VI. ¢3) are grapnel-like ; they are usually found 
entirely below the surface of the conules, but there are only a few in each conule. 
Sometimes they project outside among the pleuralia. 
The autogastralia are chiefly pentactins (VI. 3d‘), each ray being 150 x 18 
and wholly spined ; many hexactins, slightly smaller than the pentactins, also occur ; 
at the nodes of the hypogastral network there is usually a hexactin about twice the 
size of the autogastral hexactin and with the rays smooth at their bases. 
The intermedia. Oxyhexasters. Holoxyhexasters are very rare. Hemioxy- 
hexasters (VI. 3e, e') are 120m in diameter, and with almost aborted primary rays. 
