polyps and corals. 195 



Sarcodictyon. 



A species of this genus occurs creeping over dead shells. 

 The polyps in alcohol are mostly contracted and form scat- 

 tered verrucse about a line in diameter and rather mo re in 

 height, connected by slender, fleshy stolons. 



Hong Kong, China. Dr. Wm. Stimpson. 



Family, Tubiporim:. 



Tubipora rubeola? Q,uoy and Gay. 



Bonin Islands. Dr. Wm. Stimpson. 



I refer to this species, with much doubt, a fragment of 

 Tubipora of very light red color, having the transverse 

 plates about .25 of an inch apart; the tubes .1 in diameter. 

 It is too imperfect to be determined satisfactorily, if, in- 

 deed, it be possible to determine species of this genus from 

 the dry corals. 



Explanation of the Plates. 



Plate V. 



Figure 1. Pteromorpha expansa Verrill ; a polyp en- 

 larged. 



Figure 2. Virgularia pusilla Verrill; a polyp much 

 enlarged. 



Figure 3. Veretillum Stimpsoni Verrill ; a polyp 

 somewhat enlarged ; 3a, structure of the surface between 

 the polyps. 



Figure 4. Kophobelemnon clavatum Verrill ; natural 

 size, with the polyps expanded, front view ; 4a, a polyp 

 much enlarged, showing outline of stomach, below which 

 are, apparently, clusters of eggs ; 46, a tentacle much 

 magnified. 



Figure 5. Muricea sinensis Verrill ; a branchlet, natu- 

 ral size; 5a, one of the contracted cells magnified to show 

 the spicula. This and the next were drawn from nature 

 by Mr. E. S. Morse. 



Figure 6. Muricea divaricata Verrill; portion of a 

 branch, natural size ; 6a, a contracted cell much magnified, 

 showing spicula 



