340 
THE VOYAGE OF H.]\LS. CHALLENGER. 
tubercles, three larger than the rest occurring in the angles of the basal rays, and 
forming the greater part of the base of the apical ray. 2. Trisene [?). 
II. Microscleres (?). 
Habitat . — Gulf of Manaar, depth under 65 fathoms. 
Remarks . — This, like Corallistes {?) aculeata. Carter, may prove to be a Tetracladine 
Lithistid, and allied to Kaliapsis, Bowerbank. 
Gonus 3. Macandrema, Gray. 
Corallistidee in which the epirabd of the desma is smooth, zygosis is chiefly terminal ; 
the ectosomal spicules are phyllotrisencs and the microscleres are microrabds. The pores 
and oscules are simple. 
Macandrewia azorica, Gra}^ 
Macandreima azorica, Gray, Proe. Zool. Soc. Lond., p. 438, pi. xv., 1859. 
Dactylocalyx macandrewii, Bowerbank, Proc. Zool. Soc. Lond., p. 86, pi. iv. fig. 5 ; pi. v. 
figs. 1-5, 1869. 
Macandrewia azorica, Carter, Ann. and Mag. Nat. Hist., ser. 4, vol. xii. pp. 438, 441, 1873. 
„ „ Carter, op. cit., ser. 4, vol. xviii. p. 464, 1875. 
S-ponge. — Cyathiform, pedicelled, attached ; walls somewhat thick, undulating 
longitudinally, margin rounded, sinuous; surface even. Oscules small, 0'25 to 2‘0 mm. 
in diameter ; circular, with slightly raised margins more or less regularly arranged on 
the inner surface of the cup. Pores small, circular, evenly dispersed on the outer surface, 
protected by microxeas arranged tent-like. 
Spicules . — I. Megascleres. 1. Desma, protocladi usually smooth, syzygial spines 
somewhat long, conical, with rounded ends ; syzygias arranged in long straight lines 
which run radially across the wall of the sponge. Two cladi of a desma frequently lie 
tangentially with the line of syzygias, and a third crosses from one line to the next 
transversely. Such a transverse cladus usually measures about 0‘15 by 0‘035 mm. 
2. Oxeoj, fusiform, I'O by 0'016 mm., lying parallel to the syzygial lines. 3. Phyllo- 
trisene, rhabdome conical, traversed by the axial fibre throughout, cladi narrow, foliate, 
the axial fibre extending into them for a distance of 0'0296 mm. ; rhabdome 0’18 mm., 
cladi 0'25 mm. long. 
II. Microscleres. 4, Microxea, fusiform, slightly curved, 0'065 by 0'004 mm. 
Colour. — Nut-brown in the dried state. Size, 125 mm. in height, by 100 mm. in 
diameter. 
Habitat. — St. Michael’s, Azores (Gray); a few miles north of Cape St. Vincent; 
depth, 374 fathoms (Carter) ; between Faroe Islands and north coast of Scotland (Carter). 
