PLATE LX. 



Fig. 1. AcTiNOMETEA PULCHELLA, Pourtales, sp. 



Fig. 1. Transverse section of an ambulacrum behind the mouth, show- 

 ing the connection of the genital vessels [gv) and labial 

 plexus {Ip), . . . . . .X 



Diam. Patre 



50 



98 



Fig. 2. Antedon carinata, Leach, sp. 



Fig. 2. Portion of a vertical transverse section of the disk in the anal 

 interradius, showing the connection of the genital vessels 

 (gv) and labial plexus {Ij)), . . . . x 



50 



9« 



Figs. 3-6. Antedon eschrichti, MlilL, sp. 



Fig. 3. Portion of a vertical longitudinal section of the disk, which 

 passes through the peristome, showing the connection of 

 the intervisceral vessels [ilj) with the spongy organ {so), . x 35 98 



Fig. 4. Longitudinal vertical section of the peristome in the direction 



of a ray, . . . . . . . x 60 97 



Fig. 5. Part of a vertical transverse section of the disk in the anal in- 

 terradius, showing the spongy organ and labial plexus, . x 40 98 



Fig. 6. Transverse section of a brachial ambulacrum, showing one of 

 the ventral branches of the axial cord {af which extend 

 into the perisome at the side of the food-groove, . . x 65 122 



* This is ■wrongly lettered ad. 



