398 H. N. MOSELEY. 



Tabipora. 



On examining the infundibuliform tabulae of Tubipora, to 

 which attention has been drawn bj Mr. Charles Stewart,' and by 

 myself/ 1 find that the occurrence of these axial internal tubules 

 is very irregular. In some species of Tubipora they seem almost 

 entirely absent, and apparently their abundance varies in dif- 

 ferent specimens of the same species. In some few cases I have 

 detected one infundibuliform tube lodged within another, so that 

 the structure is exactly similar to that occurring in Syringopora. 

 In some cases the tubes at their lower extremities give out a 

 series of radial offsets which have somewhat the appearance of 

 septa when viewed from below. 



My assistant, Mr. Sydney Hickson, is engaged in preparing a 

 memoir on the structure of Tubipora and other Alcyonarians. In 

 this the form and relations of the curious infundibular tubes 

 of Tubipora will be thoroughly worked out, and some new in- 

 stances of polymorphism amongst Alcyonarians will be described. 



I C. Stewart, " On a New Species of Stylaster, with a Note on Tubi- 

 pora," ' Journal of the Micro. Soc.,' 1879. 



' " Report on Scientific Results of tlie Voyage of the ' Challenger,' " 

 'Zoology,' vol. iij 'Report on Corals,' p. 125. 



