410 G. HERBERT FOWLER. 
A reference to the anatomy of G. lampeyrana is made by 
Dr. von Koch (‘ Morph. Jahrb.,’ v, p. 319), who has added so 
Part of a vertical section along a branch of a decalcified Madrepora, to show 
the tubes, which ramify through the pores of the corallum, and which 
open into each other and into the ccelentera of the polyps. Circulation 
can thus be effected through the whole colony. The corallum before 
decalcification fills all the spaces between the tubes. Cf. fig. 4 and its 
explanation. 
much to our knowledge of Madreporaria, and who states that 
it closely resembles Caryophyllia. 
An examination of a young specimen shows that it is built 
on the same general type as most of the other Imperforata 
with the anatomy of which we are acquainted. There are 
twenty-four simple tentacles, six larger entoccelic, six smaller 
entoceelic, and twelve very small ectoccelic. The mesenteries 
(in this young specimen) amount to twelve pairs, of which six 
are longer than the remainder and may be accounted primary ; 
all alike bear a filamentar thickening of the usual character ; 
two of the longer pairs at opposite ends of the long axis of the 
oval stomodeum are the directives. The septa are all entoccelic,! 
and therefore are twelve in number, the six primary being 
1 According to v. Koch, the septa of Caryophyllia are both ecto- and ento- 
ceelic. 
