148 THE VOYAGE OF H.M.S. CHALLENGER. 



EXPLANATIONS OF THE PLATES. 



PLATE I. 



Parelpidia cylindrica, n. sp. 

 Fig. 1 . Dorsal view ; natural size. 

 „ 2. Ventral view ; natural size. 



Parelpidia elongata, Theel. 

 ,, 3. Dorsal view ; natural size. 

 „ 4. Ventral view ; natural size. 



PLATE II. 



Scotoplanes mollis, Theel. 

 Fig. 1. Dorsal view ; natural size. 

 ,, 2. Ventral view ; natural size. 



Kolga nana, Theel. 

 ,, 3. Dorsal view; twice the natural size. 

 ,, 4. Ventral view ; twice the natural size. 



Scotoplanes papulosa, Theel. 

 ,, 5. Dorsal view ; natural size. 

 ,, 6. Ventral view ; natural size. 



PLATE III. 



Elpidia verrucosa, Theel. 

 Fig. 1. Dorsal view ; one and a half times the natural size, a, holes after the dorsal 

 processes, which are broken off. 

 ., 2. Ventral view; one and a half times the natural size. 



Scotoplanes murrayi, Theel. 

 „ 3. Dorsal view; about four times the natural size. 

 „ 4. Ventral view ; about four times the natural size. 



