XxXxiv THE. VOYAGE OF H.M.S. CHALLENGER, 
lamelliform plates, notched on one side and bearing spines on the free margin; or 
irregular rounded plates with tufts of spinelets. Actinal interradial areas with imbri- 
cating plates bearing spines, No pedicellarie. 
Subfamily 1. GaneRtN#, Sladen, 1888. 
Asterinide with large marginal plates, and superficially phanerozonoid in character. 
Genus 1. Cycethra, Bell. 
Genus 2. Ganeria, Gray, 
Subfamily 2. AsTErinin#, Sladen, 1888. 
Asterinidz with marginal plates equal to or smaller than the other plates. Papule 
distributed throughout the abactinal area. Abactinal plates thick, crescentiform, devoid 
of internal processes, 
Genus 1. Patiria (Gray), emend. Perrier, 
Genus 2. Nepanthia, Gray. 
Genus 3. Asterina, Nardo. 
Genus 4. Disasterina, Perrier. 
Subfamily 3. Patmipeprn, Sladen, 1888. 
Asterinide with the papule confined to the radial regions, Abactinal plates in 
the median regions stellate, Abactinal plates thin, scale-like, with elongate internal 
prolongations, 
Genus 1. Palmipes, Linck. 
Genus 2. Stegnaster, n. gen. 
For a Synopsis of the Subfamilies and Genera included in the Family Asterinide, see 
p. 375. 
ASTERINIDA incertz sedis. 
Genus Tremaster, Verrill. 
The description given of this genus is not sufficient to indicate whether it should be 
placed amongst the Asterinine or the Palmipedine. It is even possible that its abnormal 
structure may require the establishment of an independent subfamily which should be 
called. Tremasterine. 
Order II. CRYPTOZONIA, Sladen, 1888. 
[ApETopNEusta : LeProsTROTERIA. | 
Euasteroidea with marginal plates inconspicuous and more or less rudimentary in the 
adult. The supero-marginal plates often separated from the infero-marginal plates by 
