PLATE Yh. 



Tr.e Lettering is the same in all the Figures. 

 A. Axial conl. 

 ir. Coeliac canal. 

 ;:/■. Genital cord. 

 j. Pinniile-jnint. 

 //. Interarticular ligament. 



in. Muscle. 



s/c. SiibtHntacuIar cnnal. 



T. Tentacle. 



V. Radial w.nter-vessel. 



HoLopu.s RANGI, rl'()rl)igiiy. 



Fig. 1. Transvcr.se section of a lower arra-joi'it, 



Fig. 2. The upper portions of three pinnule-joints, showing the arnia 

 turc covering the bases of the tentacles, . 



Fig. 3. The terminal portion of a pinnule showing the tentacular T)latcs 

 from a dry specimen, .... 



Fig. 4. Inner aspect of an entire ray, showing the rolling in of th( 

 distal arm-joints, ..... 



Fig. 5. Ventral aspect of an axillary and the lower part of an aim 

 showing the ambulacral groove, 



Diani. 

 X 80 



X 40 



X n 



X G 



Page 

 209 



X GO 208 



208 



20G 



200 



