PLATE XX. 
LETTERING ON THE FIGURES. 
GPa 6 9 0 a o Olney nem., . . . . nematocyst. 
c.isl., . . . . Cell-islet. ner. 1 . . . nerve layer. 
Gino 0 0 Oo 6 Cmnlynins Mites 6 6 0 5 sable 
ect.m., . . . . ectodermal muscle. mes. sph. m., . . mMesogloeal sphincter muscle. 
enc. sin.. . . . encircling sinus. mr. My. + . « macrocnemic mesentery. 
end... . . . .~ endoderm, @s.. . . . . » esophagus. 
end. sph. m., . . endodermal sphincter muscle. p.b.m., . . . parieto-basilar muscle. 
Gacy, . - = = giland-cells, p. gv. + . . . pigment granules. 
iner., . . ~. + incrustations. 7. @tt., . . . . reflected ectoderm. 
meés.,. - . . . mesogloea. t, . . . . ~ outer row of tentacles. 
mes. fil, . . . mesenterial filaments. ta, . . . . . inner row of tentacles. 
mest., . . . . mesentery. s.d.,. . . . . sulear directive mesenteries. 
mth; ~. » . « mouth: Yay 6 A 6 0 6 yaaa, 
Figure. 
1. Epizoanthus minutus, n. sp. (p. 869). Vertical section through a portion of the column-wall, 
showing the sphincter muscle, tentacles (cut obliquely), disc, cesophageal wall, and mesentery, 
x 50. Polyp extended. 
2. Epizoanthus minutus, n. sp. (p. 869). Transverse section through a portion of the column-wall 
and the grooved part of the disc in a partially extended polyp, showing the united bases of 
the tentacles, x 50. 
. Epizoanthus minutus, n. sp. (p. 869). Transverse section through a portion of a tentacle, x 200. 
co 
. Epizoanthus minutus, n. sp. (p. 869). Transverse section through a portion of the column-wall, 
and the mesenteries below the cesophagus, x 50. 
5. Parazoanthus Swiftii (Duch. and Michl.), (p. 872). Vertical section through a portion of the 
column-wall, base, and coenenchyme, x 50. 
. Parazoanthus Swiftii (Duch. and Michl.), (p. 372). Transverse section through a portion of the 
column-wall and a fertile mesentery, x 280. 
» 
or) 
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