1(U MB W. PERCY SLADEN ON THE ASTEROIDEA, ETC. 



Station 10. August 24, 1882. Lat. 59° 40' N, long. 7° 21' W. 

 Depth, 516 fathoms ; bottom temperature, 46° Fahr. 



Archaster bifrons. 



Astropecten Andromeda. 



Mimaster Tizardi. 



Cribrella oculata var. cylindrella. 



Station 11. August 28, 1882. Lat. 59° 29' N., long. 7° 13' W. 

 Depth, 555 fathoms; bottom temperature, 45° *5 Fahr. 



Archaster bifrons. 



Astropecten Andromeda. 



Mimaster Tizardi. 



Cribrella oculata var. cylindrella. 



Zoroaster fulgens. 



Station 13. August 31, 1882. Lat. 59° 51' 2" N., long. 8° 18' W. 

 Depth, 570 fathoms ; bottom temperature, 45° '7 Fahr. 

 Zoroaster fulgens. 



DESCRIPTION OF PLATE XXVI. 



Pteraster militaris var. prolata. Abactinal aspect ; natural size. 

 Rhegaster Murrayi. Abactinal aspect ; magnified 2 diameters. 

 „ Actinal aspect; magnified 2 diameters. 



„ Portion of the dorsal surface ; magnified 20 diameters. 



„ One of the spines of the dorsal surface, seen in profile ; highly 



magnified. 

 „ The same spine seen from above ; highly maguified. 



„ Adambulacral plates and portion of the adjacent ventral sur- 



face ; magnified .8 diameters. 

 „ Mouth-plates; magnified 10 diameters. 



Cribrella oculata var. cylindrella. Abactinal aspect ; natural size. 

 Zoroaster fulgens. A young example. Abactinal aspect ; magnified 3 diameters. 

 „ Outline of the profile of the. same specimen. 



Fig. 11. „ Diagram of the plates of the disk, showing their correspondence 



with the crinoid calyx. The respective plates are marked as 

 follows : — 



1. Dorso-central. 



2. Under Basals. 



3. Basals. 



4. Radials. 



Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 



1. 

 2. 

 3. 

 4. 

 5. 



Fig. 



5a. 



Fig. 



6. 



Fig. 



7. 



Fig. 

 Fig. 



8. 

 9. 



Fig. 



10. 



