R. W. H. ROW—REPORT ON THE SPONGES : NON-CALCARBA. 359 
CIOCALYPTA TYLERI, Bowerbank. 
Synonymy :— 
1873. Ctocalypta tyler’, Bowerbank (3). 
1904. Ciocalypta tyleri, Dendy (11). 
~ There are several specimens of this species in the collection. Two of 
these are complete, the rest being more or less fragmentary. The complete 
specimens are each in the form of a subspherical cushion, from which the 
finger-like processes characteristic of the genus arise. The largest specimen 
measures 50 mm. in diameter, and the basal cushion-like mass is 35 mm. 
thick. The processes are very numerous, and vary in length from 25 mm. 
to 60 mm. Their average diameter at the base is 4 mm. 
The skeleton arrangement and the spicule measurements are of the type 
ordinarily met with in this well-known species. 
Another specimen, also assigned to this species, consists of a number of 
processes (about 20) united together at frequent intervals, and considerably 
larger than those of the typical specimens given above. They measure 
105 mm. long, and average 6 mm. in diameter at their widest point. They 
taper gradually towards each end from the middle of their length, and show 
no signs of any attachment surface, either to the rest of the specimen or to a 
support. 
The colour of all the specimens is white in spirit. 
The skeleton and spicules are exactly similar in all these specimens to the 
type of this species. 
Locality. Trawled at Khor Dongonab, north of the Barrier, from very 
barren mud in 20 fathoms. 
Distribution. Red Sea ; Ceylon. 
Order EUCHRATOSA. 
Non-caleareous sponges without siliceous spicules, but with a skeleton 
consisting of horny fibres developed independently, 7. e., not in relation to 
any previously existing spicular skeleton. (The skeleton is sometimes 
replaced or supplemented to a greater or less extent by foreign bodies.) 
Family APLYSILLID &. 
Euceratosa with a dendritic or reticulate skeleton composed of spongin- 
fibres containing a more or less distinct pith, but usually without foreign 
inclusions ; sometimes also with isolated spicules of spongin ; with a lacunar 
canal-system and large sac-shaped flagellate chambers opening by wide 
mouths direct into wide exhalant lacune. 
