2. W. H. ROW—REPORT ON THE SPONGES : NON-CALCAREA. 315 
supposing them different to the spicules of the interior of the sponge. These 
have a maximum length of 1:6 mm. and a diameter of 0:025 mm. at their 
thickest point. 
(ii.) The small choanosomal oxea are short and very slender. They lie 
irregularly throughout the choanosome and are quite unoriented. They do 
not seem to occur more thickly in one part of the sponge than another. They 
measure 0°15 mm. in length, by 0:021 mm. in diameter. 
B. Microscleres. 
The only microscleres found in this species are small delicate sigmata of 
typical shape. They occur profusely scattered throughout the choanosome, 
and in somewhat less numbers in the ectosome. They measure 0:01 mm. to 
0-015 mm. across the curve. 
Locality. All the specimens were obtained at Tella Tella Kebira. 
Distribution. Red Sea. 
Family HAPLOSCLERID&. 
Sigmatotetraxonida in which microscleres, when present, are usually in the 
form of sigmata or derivations thereof, but never chele. The skeleton is 
reticulate and the fibre is typically non-plumose. The megascleres are all 
monaxonid and usually diactinal. 
Sub-Family RENIERINE. 
Haploscleridee in which the microscleres have entirely disappeared and the 
skeleton consists of a reticulation of oxeote megascleres with little or no 
‘spongin. 
RENIERA IMPLEXA, O. Schmidt. 
Synonymy :— 
1870. Reniera implexa, O. Schmidt (25). 
1886. Reniera impleva, Ridley & Dendy (24). 
1904. Rentera implexa, Topsent (33). 
1905. Reniera implexa, Dendy (11). 
A few broken cylindrical tubes occur in the collection, which agree very 
well with Schmidt’s (25) description, both as to external form and appearance 
and in their spiculation. 
Locality. No defimite locality is given. The bottle is labelled “Sponge 
rials is 
Distribution. Red Sea, Ceylon, Adriatic, Azores. 
