Davenport. — Cristatella. 



PLATE VI. 



Fig. 5o. Young funiculus, showing its connection with polypide. x 390. 



64. Origin of muscles. The section passes diagonally across a partition at 

 the left, di sep. r., and cuts the polypide taneentially at the right. 

 X 390. 



55. Section including a radial portion, showing the position of the muscles in 

 the partition near the margin of the colony. X 390. 



56. Section through tjie retractor and rotator muscles of a polypide of about 

 the age of that shown in Fig. 77. X 390. 



57. Young funiculus, whose upper end is free from the coelomic epithelium of 

 the roof of tiie colony, x 390. 



58. Section through the sole, showing the relation between the muscle cells 

 and the muscularis of the sole. X 600. 



59. Section across a radial partition, and both rotator and retractor muscles 

 which are migrating from the roof to the sole. >' 390. 



00. Section at right angles to the wall of the colony, showing the elongated 

 and unmetamorphosed cells of the margin, x 390. 



