REPORT ON THE TETRACTINELLIDA. 
207 
Coppatias coriaceus (Carter). 
StellettiTiopsis ccrnacea-, Carter, Ann. and Mag. Nat. Hist., ser. 5, voL xvii. p. 126, 1886. 
Sponge. — A large irregular fragment enclosing large bivalve shells in its substance. 
Surface smooth ; ectosome thick. Oscules in small groups, irregularly distributed. 
Spicules. — I. Megasclere. 1. Rhabdus sometimes an oxea, sometimes a strongyl- 
oxea, 1’35 by 0*0187 mm. 
II. Microscleres. 2. Microxea, 0*104 mm. in length. 3. Euaster, 0'0083 mm. in 
diameter. 
Colour. — DuU purple when alive. Size, a fragment 75 mm. in diameter. 
Habitat. — South Australia ; depth, 20 fathoms. 
Coppatias tuberculatus (Carter). 
Stelleitinopsis tuhercOlata, Carter, Ann. and Mag. Nat. Hist., ser. 5, vol. xvii. p. 126, 1886. 
Sponge. — Massive, sessile, covered with nodular tubercles, which are agglomerated 
into groups. Surface rough, minutely and uniformly granulated. Oscules (and pores X) 
small, numerous, situated in the sulci between the agglomerated tubercles. 
Spicules. — I. Megasclere. 1. Oxea, 0*75 by 0*0125 mm. 
II. Microsclere. 2. Aster, 0*0083 mm. in diameter. 
Colour. — When fresh, dull purple-brown. Size, 113 mm. high, 100 and 75 mm. in 
length and breadth. 
Habitat. — South Australia ; depth, 3 fathoms. 
Coppatias purpureus (Carter). 
Stellettinopsis purpurea. Carter, Ann. and Mag. Nat. Hist., ser, 5, vol xviii. p. 459, 1886. 
Sponge. — Massive, more or less hemispherical. Surface smooth, uneven ; pores (?) 
“ punctate, general.” Oscules few, large, scattered. Cortex about 0*5 mm. in thickness. 
Spicules. — I. Megasclere. 1. Oxea, fusiform, curved, sometimes tornote or strongylate 
at ond or both ends, 0*8 by 0*02 mm. 
II. Microscleres. 2. Chiaster, centrum small, actines numerous, cylindrical, slender, 
faintly tylote, 0*012 mm. in diameter. 3. Microxea, 0*077 by 0*006 mm. 
Colour. — Reddish purple. Size, 37 mm. high by 37 mm. in diameter. 
Habitat. — Port Western, South Australia. 
Coppatias luteus (Carter). 
Stellettinopsis lutea, Carter, Ann. and Mag. Nat. Hist., ser. 5, vol. xviii. p. 459, 1886. 
Sponge. — An irregular mass growing over and enclosing fragments of agglomerated 
sand and shells. Surface smooth. Oscules numerous, large, situated on the summits of 
low conical elevations, generally distributed. Pores from 0*03 to 0*1 mm. in diameter. 
