REPORT ON THE TETRACTINELLIDA. 
353 
papilla, situated on the outside of the sponge, 1 to 2 mm apart. Pores small, scattered 
over the inner surface. 
Habitat . — Portugal and St. Jago (0. Schmidt). 
Genus 9. Sympyla, n. gen. 
Azorica, in part, 0. Schmidt, Spong. Meerb. Mexico, p. 89. 
Azoricidse in which the poral terminations of the incurrent canals are collected 
together into separate areas, which are distributed over one side of the sponge ; the 
oscules are simple, and are distributed over the side opposite to that bearing the 
pores. 
I refer this genus to the Azoricidse on general grounds, as the specimen on which it 
is founded is deciduous. We do not know whether microscleres were present or not. 
Sympyla crihrifera (0. Schmidt). 
Azorica crihriphora, O. Schmidt, Spong. Meerh. Mexico, p. 89, pi. v. fig. 4, 1880. 
Sponge. — Vasiform, walls thick, margins rounded, central cavity somewhat shallow ; 
pedicel short, base slightly enlarged, attached. Oscules numerous, circular, 1 mm. 
in diameter, with margins elevated or produced into short tubes, distributed in 
more or less regular spiral lines, leading into more or less vertically descending 
canals. Pores not seen, poriferous areas raised above the general surface, rendered 
cribriform by the numerous openings of narrow incurrent canals from 0‘2 to 0‘5 mm. 
in diameter. 
Spicules. — I. Megascleres. 1. Desma oi the usual “azorica” forms. The epirabd 
usually smooth, 0'045 mm. in diameter ; syzygial tubercles frequently bearing bifid 
spines, with papillary ends, syzygial lamellae frequently minutely crenate or denticulate 
at the distal margin. Crepidial axis from 0'04 to 0'05 mm. in length. 2. Tylote (?), 
cylindrical, with very slightly enlarged ends, which are sometimes minutely roughened, 
0-35 by 0-01. 
II. Microscleres (?). 
The specimen is a skeleton denuded of all soft parts ; it is therefore doubtful whether 
the tylote really belongs to it, still more doubtful whether microscleres were originally 
present or not. 
Colour. — C?). Size, in height 54 mm. ; major and minor axes of the margin of the 
cup 47 mm. and 35 mm. respectively; depth of the central cavity 20 mm., walls 10 mm. 
in thickness ; pedicel 1 5 mm. in diameter. 
Habitat. — Barbados ; depth, 200 fathoms. 
(ZOOL. CHALL. EXP. — PART LXIII. — 1888.) 
Rrr 45 
