282 DISCOVERY REPORTS 



Fig. B 



1. Perknasterfusctis antarcticus, St. i8i. Abactinal spinelet, 0-5 mm. long, x 100. la. Profile of an abactinal 

 paxilla; pedicel 0-2 mm. high, x 50. 



2. Perknaster sladeni georgianus, St. 42. Abactinal spinelet, 0-54 mm. long, x 100. 2a. Actinal spinelet, 

 0-72 mm., X 100. zb. Profile of abactinal paxilla ; pedicel 0-4 mm., x 50. 



3. Perknaster sladeni, Shag Rocks. Abactinal spinelet, o-6 mm. (to 0-7 mm.), x 100. 3 a. Actinal spinelet, 

 0-86 mm., x 100. 36. Two adambulacral furrow spinelets, 2-2 and 2-7 mm., x 25. 3 c. Profile of abactinal 

 paxilla; pedicel 0-54 mm., x 50. 



4. Pe>-/f«a5/e>-i/a^«»', St. 182. Two abactinal spinelets, 0-65 and 0-67 mm., x 100. 4a. Profiles of 2 abactinal 

 paxillae; pedicels 0-5 and 0-46 mm., x 50. 46. Normal actinal spinelet, o-8 mm., x 100. 4c. One of the 3 

 valves of an actinal pedicellaria, o-66 mm., x loo. 



5. Perknaster charcoti. Profile of paxilla of large specimen C, pedicel 0-62 mm., spinelets 0-74 mm., x 50. 

 5a. Abactinal spinelets of small specimen B, 0-53 and 0-63 mm., x 100. ^b-^d. Specimen B, profiles of 3 

 paxillae, pedicels 0-45, 0-36, 0-45 mm., x 50. ^e. Actinal spine of large specimen C, 1-7 mm., x 50. 



