EXPLANATION OF PLATE XXXa. 
Annulella gemmata, nov. gen. et sp. 
Fic. 7.—Portion from near tip of much extended tentacle, show- 
ing nodal and internodal areas, and arrangement of 
nematocysts in nodal cells, X 320. 
8.—Median longitudinal section of contracted tentacle, X 770. 
n.c. central nematocyst (macrocnide) of nodal cell; 
np. peripheral nematocyst (microcnide) of nodal cell; 
ect. ectoderm; end. endoderm; mes. mesogloea; cn. 
enidocil. 
9.—Median longitudinal section of lower portion of polyp and 
basal bulb, X 540. ect. ectoderm (absent at neck of 
basal bulb); mes. mesogloea (note great thickening 
within neck of basal bulb); end. endoderm; cvel. coel- 
enteron; gel. hyaline, gelatinous secretion (it is diff- 
cult to distinguish the relationships of this secretion 
to the cellular layers, in places it appears to be continu- 
ous with the walls of the ectoderm cells, and in one 
area it seemed to come in contact with the meso- 
gloea); per. perisarc of basal bulb; a. unconsolidated 
area of debris-laden secretion into which the firm peri- 
sarc merges. 
a) 
9) 
