74 MCMURRICH. 
EXPLANATION OF PLATES. 
D & D!= directive mesenteries. nm = nerve layer. 
ec = ectoderm. ~6m = parieto-basilar muscle, 
en = endoderm. s¢ = stomodzeum. 
go = gonidial groove of stomodzum. sp = sphincter muscle. 
nt = muscle cells. ¢= tentacle. 
mec = modified ectoderm. ver = verruca. 
mel = elevations of mesogloea. yc = yellow cells. 
mes = mesentery. I., II., III., I1V., V.= the cycles of mesen- 
mgl = mesoglcea. teries. 
mp = muscle processes of mesogloea. 
DESCRIPTION OF PLATE I. 
(All the figures are natural size.) 
Fic. 1. Aiptasia annulata (Les.), And. 
Fic. 2. Aiptasia tagetes, var. a, spongicola. 
Fic. 3. Condylactis passiflora, Duch. and Mich. 
Fic. 4. Bunodes teniatus, n. sp. 
I 
2 
3 
4 
5: Aulactinia stelloides, n. sp. 
Fic. 6. Sextant of disc of Audactinia stelloides. 
7. Lebrunea neglecta, Duch. and Mich. 
8. Discosoma anemone (Ellis), Duch. 
9. Rhodactis Sancti Thome (Duch. and Mich.). 
0. Heteranthus floridus (Duch. and Mich.) 
