334 
THE VOYAGE OF H.M.S. CHALLENGER. 
Kaliapsis cidaris, Bowerbank. 
Kaliapsis cidaris, Bowerbank, Phil. Trans., pi. xxiv. figs. 32-38, 1858, and p. 759, pi. xxviii. 
fig. 12, 1862 ; Mon. Brit. Spong., vol. i. p. 80, pi. iv. figs. 102, 103, pi. v. 
figs. 104-108, 1864; Proc. Zool. Soc. Lond., pp. 76, 337, pi. xxv. figs. 2-5, 
1869. 
„ „ Carter, Ann. and Mag. Nat. Hist,, ser. 4, vol. xii. p. 441, 1873. 
,, „ Zittel, Abhandl. d. k. baier. Akad. d. Wiss., Bd. i. pp. 103, 152, pi. i. figs. 
12, 12a, 1878. 
Sponge. — Incrusting, very tbin. Oscules and pores (?). 
Spicules. — I. Megascleres. 1. Desma, actines smooth, cylindrical, syzygial ends 
finely branched, terminating in numerous somewhat elongated tubercles. The desmas of 
the lowermost layer of the skeleton are orientated so that one epactine projects at right 
angles to the underlying surface, the other three are curved backwards or upwards. 
The single basal epactine is not branched, and has the form of a conical spine, surrounded 
over its proximal half by a zone of longitudinal rounded ridges or elongated tubercles. 
Hence the specific designation “cidaris.” 
2. Discotrisene, rhabdome short, cladome disciform, circular, or elaborately branched, 
bearing boss-like tubercles on the outer surface. Rhahdus (?). 
II. Microsclere. 3. Microstrongyle, fusiform, 0'028 by 0'0042 mm. 
Colour. — (1). Size, 6 mm. in diameter, by 0'62 mm. in thickness. 
Habitat. — South Seas ; growing over Oculina rosacea. 
Remarks. — Although the specimen from which Bowerbank’s description is taken is a 
dried one, it retains portions of the tissue, and in this microstrongyles were found in 
great numbers. As Bowerbank examined these under a power magnifying 666 diameters, 
he would have seen spirasters had they been present ; as he does not mention them, we 
may conclude their absence. 
Neosiphonia scJimidtii, n. sp. 
Jereopsis sp., 0. Scbmidt, Spong. Meerb. Mexico, p. 20, pi. ii. fig. 10, 1879. 
Sponge. — Pyriform, supported on a short pedicle, summit flattened, oscules confined 
to the summit, the openings of longitudinal excurrent canals. 
Spicules. — I. Megascleres. 1. Desma, epactines cylindrical, smooth, about 0'127 
by 0’039 mm. to 0'16 by 0’05 mm.; seldom bifurcating more than once, cladi short, 
breaking up into numerous syzygial tubercles; zygosis generally terminal. 2. Triaene {?), 
said by Schmidt to be absent. 
II. Microscleres [X). 
Habitat. — Gulf of Mexico ; depth, 80 to 92 fathoms (0. Schmidt). Near Havanna ; 
depth, 80 and 175 fathoms. Lat. 22° 9' 30" N., long. 52° 21' 20" W. ; depth, 292 fathoms. 
Off Morro Light ; depth, 805 fathoms. 
