12 R. KIRKPATRICK. 
The autodermailia (V. 1c) are pentactins with or without a distal knob, with all the 
rays (each 180 x 13 in length) tapering and wholly spined. Hexactins occur, but rarely. 
The hypodermalia (V. 1d-d’) (pleuralia and basalia) are oxypentactins with 
rough or smooth rays, orthotropal or anorthotropal, the average length of a 
paratangential being 1660 x 50m. 
The autogastralia (V. le) are hexactins 266 x 12, and closely spined. 
The intermedia are holoxyhexasters (rare), hemioxyhexasters (V. lf, f*), and 
abundant monoxyhexasters (V. 1f°, f°), about 1694 in diameter. The calycocomes 
(V. 1g, g') are 226 in diameter. The primary rays are only 8 in length; the 
capitulum is 14°5y in length and 22 in breadth; the secondary rays, 3 to 5 in 
number, are thick, and either without any terminal knob, or with a very small one. 
Fig. th, a calycocome, with long primary rays, and without terminal disks, is only 
87p in diameter, and is probably immature. 
The discohexasters (V. 1k) are of large size, averaging 110m in diameter; the 
primary rays (each 4°5u in length) terminate in two to four long, disk-tipped 
secondary rays. 
Fig. 11 shows a monodiscohexaster 120 in diameter. 
The microdiscohexasters (V. 1m) are 51 in diameter; the primary rays, each 
7 in length, terminate in a convex disk-shaped capitulum, from the distal surface of 
which rays two lengths are given off, the longer rays having larger disks. 
Rossella podagrosa differs from R. antarctica in that the hypodermal oxypentactins 
are without prickles; secondly, the basalia resemble the pleuralia, whereas in L. 
antarctica the basalia are anchor-like ; further, the calyeocomes of the new species have 
very short primary rays; and lastly, the buds are entirely different in the two species. 
Rossella nuda Topsent, has no velum. 
Rossella racovitze Topsent, is likewise without a velum, and its surface is covered 
with conules. 
Rossella henactinophila, a new species about to be described, closely resembles 
ft. podagrosa, but is distinguished by its hexactin autodermalia, and by the different 
shape and larger'size of the calycocomes ; also its oxyhexasters have more slender rays. 
All specimens were obtained from Winter Quarters by means of the D-net. (1) No. 
104, Hut Point, September 24, 1902, 26 m. (14 fathoms) ; (2) Nos. 118, 120, Hut Point, 
November 13, 1902, 46m. (25 fathoms); (3) No. 137, Flagon Point, January 17, 1903, 
18-36 m. (10-20 fathoms) ; (4) No. 139, January 23, 1908, 18-36 m.; (5) No. 239, 12 
hole, 46-55 m. (25-80 fathoms). 
AOSSELLA HEXACTINOPHILA. 
(Plate HL, fig. 4, and Plate VI, figs. la—g.) 
Sponge forming an elongated oval flattened sack with a sharp-edged oval orifice 
provided with marginalia. With a velum; and with a root-tuft about 2 cm. in length 
mainly composed of oxypentactins resembling those of the velum. 
