OP SOUTIIEPX INDIA. 
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0. Family —ENT AL OFROEIDJE. 
Pustuliyoridce, aucfc., in part. Sparsula, d’Orb., in part. 
Colonies ramose, altached only by the base of the stem lo foreign objects, or 
creeping on the same; cells tubular, irregularly distributed ocer the surface, and, 
as a rule, loithout any intermediate, or accessory, pores. 
Those CYCLOSTOMATA which have tlie cells provided with tubular, pro- 
jecting orifices appear to he rationally divisible into three families: 1, the 
ExTALOPiLoitiD.^, as uhovc characterized; 2, the Idmoxeidje, iu which the orifices 
are arranged in regular rows, cither all round a hranch, or only on one or two 
sides (Idmonea, Rornera, Spiropmra, &c.) ; 3, the Fasciporidje, in which the cells 
arc arranged in more or less regular groups (Cyrlopora, Actinopora, &c.). An 
epithece appears to he always present on the stems, hut whether it is solid or 
provided with intermediate pores hetween the regular cells cannot he looked upon 
of higher than generic value, as is, for instance, the case hetween Idmonea and 
Crisina, or hetween Spiropora and Spiroporina, and others. The presence of the 
superficial pores appears to depend upon that of certain longitudinal canals, which 
sun’ound each tubular cell, and the signification of wliich is as yet unknown. The 
numerous family divisions introduced hy d’Orhigny in his section ‘ TubulatA are 
untenahle. 
Of several of the genera belonging to the present family, I have given a review 
in my fossil Bryozoa from Ncav Zealand (Com]). Beisc der Oest. Pregatte Novara, 
Geol. Thcil, 1st Band, 1805, p. 97 et seq.). In the South Indian cretaceous deposits 
only two have as yet been found, each being represented hy two species. 
Froboscina, Audouin, 1820. 
Colonies creeping on foreign objects, permanently attached in narrow, branched, 
single, and more or less elevated or convex layers. The species of this genus are 
most numerous iu jurassic and in cretaceous deposits. 
Entalophora, Lamx., 1821. 
Colonies erect, ramose, attached with the base to foreign objects ; branches 
cylindrical or slightly compressed ; orifices of the apcrtiu’c irregularly disposed all 
round the stems. 
The Entalophorce mostly occur in cretaceous deposits, but are also represented 
both in the jvu'assics and in the tertiaries, as well as in the present seas. I havm else- 
where (Novara Fvcise, loc. cit., p. 101,) discussed the propriety of adopting the name 
EnlalopAora in place of that of Fustidopora of Blainville, and although several 
authors still retain the latter name in ])refercuce to the older one, I do not sec 
the least change in the arguments which I then produced. 
In the same paper I have adopted d’Orbigny’s name Bidiastopora in a some- 
what dilTcrcnt sense from the original characteristic given of the genus, namely, 
retaining it for a certain number of Enlalophorai with slightly compressed branches. 
Some of these forms had been referred already by d’Orbigny to his Bidiastopora, 
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