208 ERNEST WARREN. 



Explanatory References. 



b. Youngest stage of Scliizophyte. c. b. Ceutral body. c. 2>- Con- 

 tracted polyp. c/i|. Outer vertically striated layer of perisarc. ch^. 

 Inner laminated layer of perisarc. cli. Channel in spermatic tissue. 

 cl. r. Clasping branch of stolon, d. b. Dividing body. d. g. Digestive 

 cavity, e. Ectoderm of umbrella, ect. Ectoderm lining spadix and 

 ectotheca. e. cy. Empty cavity of capsule, e. c. Ectodermal nuclei in 

 generative epithelium. e. I. Endodermal lamella. e. ef. Ectodermal 

 ejiithelium of umbrella cavity, en-^. Outer envelope of capsule, en.y 

 Outermost envelope of inner capsule, en. h. Endoderm of bypostome. 

 em. g. Empty gonopliore. ex. I. Outer layer of perisarc with adhering 

 debris, ex. p. Expanded polyp. Ji. Follicle cells, g. Female gono- 

 phore. gl. c. G-landular cell of endoderm. /. I. InneiTuost layer of 

 capsule, less pellucid than the other layers. I. sh. and In. sh. Inner 

 sheath or capsule. l\ Knarled stolon. I. s. Laminated structure, n. 

 Nematocyst. n. o. e. Nuclei of ectodermal epithelium of ectotheca 

 lining umbrella cavity, o. Oviim. o. I. Outer coating of mud and sand. 

 o. en. Outer envelope of capsule, o. u. Oj^ening of umbrella cavity. 

 PI. Planula. p. b. Capsules of supposed Scliizophyte. p. el. Polyp 

 elongated, with tentacles alternately elevated and depressed. ;•. Ringed 

 portion of stem. r. c. Radial endodermal canal, s. b. Stranded bodies 

 in the suljstance of the capsule, s. I. Laminated perisarc layer, s. p. 

 Ectodermal canals continuous with umbrella cavity, spo. Spore, u. c. 

 Umbrella-cavity, u. s. Umbrella space, y. g. Young gonophore appear- 

 ing as a bud on the stem. y. s. Young stages of Scliizophyte. ;/. gh 

 Yolk -"lobules. 



