314 University of Calif ornia Publications in Zoology. [Vol.4 

 . Selenariidae Busk. 



Selenariadoe Busk, 1854. 

 Selenariidce Busk, 1859. 

 Membraniporidce (sp.) Smitt, 1873. 

 Microporidcc (sp.) Smitt, 1873. 



Zoarium more or less regularly orbicular, convex on one side, 

 plane or convex on the other, probably free. Furnished with 

 large and powerful vibraciila (probably locomotive) often having 

 arenaceous particles affixed in the center of the under surface. 



The relationship of this family is by no means clear and its 

 insertion in this list following the Celleporidce is not intended to 

 represent its true taxonomic position. As Smitt ('72) maintains 

 there is considerable resemblance between the zooecia of Cupidaria 

 and Memhranipora, and perhaps a closer resemblance between the 

 opercula of Cupularia and Micro pora. No investigations, as far 

 as I know, have been made on living colonies nor on the embry- 

 ology, or on any part of the development of any member of this 

 family, so that its true relationship is still a matter of doubt. 

 But one species occurs in our collection and all of the specimens 

 obtained, although recent, were dry and more or less worn. 



Cupularia Lamouroux. 



Cupularia Lamouroux, 1821. 

 Lunidites Lonsdale, 1845. 

 Cupularia, Busk, 1854. 



Zoarium circular or oval, convex, free. Each zooecium fur- 

 nished with a vibracular chamber and a long seta, disposed in 

 alternate rows radiating from the center or apex of the zoarium. 



83. Cupularia canariensis Busk. 



PI. 24, figs. 90. 91. 



Cupularia canariensis Busk, 1859, vol. 7, p. 66, pi. 23, figs. 6-9. 

 Cupularia canariensis Busk, 1859, p. 87, pi. 13, fig. 2. 

 Memhranipora canariensis, Smitt, 1873, pt. 2, p. 10, pi. 2, figs. 



69-71. 

 Cupulifera (sp.), Arnold, 1903, p. 92. 



Zoarium circular in younger stages, afterward becoming some- 

 what oblong, conical, sometimes very convex on the upper sur- 

 face, concave on the lower, touching the substratum only on the 



