R. W. H. ROW—REPORT ON THE SPONGES : NON-CALCAREA. oil 
TRACHYOPSIS HALICHONDRIOIDES, Dendy. 
Synonymy :— 
1904. Trachyopsis halichondrioides, Dendy (11). 
This species, previously only recorded from Ceylon, is represented in the 
collection by several large specimens, some of which are considerably larger 
than the type specimen. The general character of the specimens is, however, 
exactly that assigned to this species in Dendy’s original description, the 
sponge being large, massive, and irregular, with irregular, more or less 
conical projections here and there on its surface, each of which possesses an 
osculum at its summit. 
The largest specimen forms an irregular mass 100 mm. long by 55 mm. 
broad. Its thickness varies in different parts from 10 mm. to 25 mm. 
The skeleton arrangement is even denser than in Dendy’s specimen, and 
the dermal spicular brushes, which are characteristic of the genus, are very 
well marked. The spicules vary enormously in length, and specimens of all 
sizes are mixed up together, the smaller specimens being apparently young 
spicules in process of formation. The length of full-grown specimens is 
about 0°6 mm. 
Locality. No locality for these specimens was given, the bottle containing 
them being labelled merely “ Sponge Trials 1.” 
Distribution. Red Sea, Ceylon. 
Sub-Family CHALININ2. 
Haploscleridee without microscleres and with diactinal megascleres. 
Skeleton a network of more or less strongly developed horny fibre covered 
by megascleres. 
PACHYCHALINA VARIABILIS, Dendy. 
Synonymy :— 
1890. Pachychalina variabilis, Dendy (8). 
This species is represented in the collection by a single large specimen 
composed of a number of irregular lobes and branches, which grow erect and 
arise from a rather small base. The whole sponge presents an exactly similar 
appearance to that shown in Dendy’s (11) figure of this species. There does 
not seem to be any real difference between the cylindrical branches and the 
large lobes which occur here and there in the specimen ; the lobes may arise 
by the enlargement of branches, and branches may grow out of these lobes. 
In one place the sponge has formed a fairly large irregular covering around 
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