PLATE 7. 



FREDEBICELLA REGINA Leidy, Mss. 



Fig. 1.* One colony, life size, with all the branches attached. (Gor- 

 ham, Me.) 



Fig. 2. Two branches of one colony : one attached and one free. 

 (Cambridge, Mass.) 



Fig. 3. Attached branch of one colony. (Gorham, Me.) 



Fig. 4. Magnified view of one adult zooid. (Norway, Me.) D, ecto- 

 cyst ; E, endocyst ; V, funiculus ; M, gastric retractors ; M', lophophoric 

 retractors ; M ", brachial retractors ; N, anterior retentors ; N ', posterior 

 retentors ; F, brachial collar ; G, calyx ; H, tentacles. 



Fig. 5. f Section of a young specimen, showing the internal structure 

 and the limited extent of the invaginated fold. ( Cambridge, Mass. ) D, ecto- 

 cyst ; E, endocyst ; B, invaginated fold ; Y, bud ; >T, anterior retentors ; K ? 

 resophagus; H", cilia; K'", oesophagal valve; K', stomach ; K"", posi- 

 tion of intestinal valve ; K ", intestine ; K, anus; I, lophophore; I/, epis- 

 tome ; I", mouth ; H, tentacles ; F, brachial collar ; S, nerve mass. 



Fig. 6. J Lateral view of an invaginated specimen, showing the shape of 

 the coencBcial orifice. A "", orifice ; L, region of the sphincter ; D, ecto- 

 cyst ; E, endocyst. 



Fig. 7. View of the same from above. 



Fig. 8. Front view of a zooid, showing the incipient arms and the rela- 

 tive positions of the muscles. M ', lophophoric retractors ; M ", brachial re- 

 tractors ; I ', epistome. . 



*This figure was drawn and presented to me by Mr. Morse. 



tThis figure is part of a study drawing made by Prof. H. J. Clark, and oblig- 

 ingly placed at my disposal by him. 



JA11 figures with no locality mentioned must be referred to the habitat 

 last named ; thus in PI. 7, Figs, 6, 7 and 8 are all from the same locality as Fig, 6. 



