558 Report of the State Geologist. 



TRYPiD^ by the cell apertures being situated in vestibular areas ; 

 from Favicellid^ by the presence of pseudosepta and lunaria. 



[Family Fistuliporidae, Waagen, emend. 



The forms comprised in this family usually consist of explanate 

 fronds, free or incrusting, globular or subglobular masses, or 

 sometimes of irregular masses. Cells tubular with two pseudo- 

 septa and a lunarium at the aperture ; intercellular space occupied 

 by vesicles or tabulate mesopores ; near the base invariably by 

 vesicles, which probably serve to support the slender cell tubes. 



The general appearance of these forms is very similar to the 

 FiSTULiPOBmiD^, but they may very easily be distinguished by 

 the presence of pseudosepta and lunaria. " The peculiar horse- 

 shoe shaped sinus along one side of the autopores (cell tubes) 

 formed by the pseudosepta has been considered with much prob- 

 ability, as corresponding in the living animal with a ciliated groove 

 (" siphonoglyphe ") such as is found in the oesophagus of the 

 Alcyonarians. 



" It is but fair to state here, that several authors consider Fistu- 

 LiPORA. and allied genera to be coelenterate corals of the order 

 Aloyonakia, and to increase by coenenchymal gemmation; that 

 the cell tubes are occupied by autozooids and the vesicles or 

 mesopores by siphonozooids. 



'' In coenenchymal gemmation a number of these coenenchymal 

 tubes apparently unite to form together a new autozooid, so that 

 several reduced individuals become blended together into a single 

 perfect one. ^ * * E'ow with this transformation a great change 

 in size certainly goes hand in hand, and the new autozooid certainly 

 requires much more room than did the siphonozooid. It might 

 then be imagined that in reality that only one of the siphono- 

 zooids inhabiting the coenenchymal tube is transformed into an 

 autozooid, but to make room for the new individual, thus formed, 

 the surrounding siphonozooids die, and that the first sign of the 

 beginning of the decay is just the thickening of the outer walls, 

 which are destined to form together the outer wall of the new 

 autozooid." (Waagen, PalseontographicaIndica,Yol. I, Ser. XII 1, 

 pp. 905, 906.) 



If this view is correct, the vesicles (coenenchymal tubes) should 

 be smaller than the autopore, but in reality they are frequently 



