32 



MISS RUTH M. HARRISON ON NEW ALCTONARIA 



canals in the branches ; ccenenchyme containing quantities of spicules ; polyps capable 

 of complete retraction, and spicules of anthocodia generally not arranged en chevron. 



Genus Chironephthya. 



Branching Siphonogorgiidse with a ring of nutritive canals in the stem, outside which 

 the ccenenchyme contains numerous spicules ; in the branches the canals become larger 

 and the partition-walls- much reduced, large spicules are scarce, but small spiked spicules 

 abundant ; polyps generally not retractile, and points of the anthocodia have 2-4 principal 

 spicules arranged en chevron. 



Prof. Hickson has already suggested that Siphonogoi*gia pendula and S. macrospina 

 should be referred to the genus Chironephthya ; from the above definitions this suggestion 

 is amply confirmed. From the short diagnosis and the figure of S. squarrosa described 

 by Studer from a manuscript of Kolliker's, this species should also be placed in the genus 

 Chironephthya. I have also little hesitation in placing in this genus: (1) Kukenthal's 

 Spongodea indivisa, described as "Ubergang zu Siphonogorgia" and founded for two 

 specimens, and as the length given is only !) mm., presumably this is the larger of the 

 two; (2) Thomson's Stereacanthia indica, gen. et sp. nn. The description of the canals 

 and anthocodia corresponds so nearly with my definition of Chironephthya that it leaves 

 little room for doubt. 



The described species of Siphonogorgia and Chironephthya are, then, as follows : — 



1. Siphonogorgia godefroyi, Kolliker . 



2. „ mirabilis, Klunzinger 



3. 



4. 

 5. 



6. 



7. 

 8. 



kollikeri, Wright & Studer 

 pustulosa, Studer . 

 pallida, Studer . . . 

 miniacea, Kiikenthal. 

 cylindrata, Kiikenthal 

 rotunda, sp. n. . . . 



1. Chironephthya dipsacea, Wright & Studer 



2. 

 3. 

 4. 

 5. 

 6. 



l'clew Islands. 



Red Sea, Arafura Sea, North-west Australia, 



Temate, Maldive Archipelago. 

 Amboina. 



Api, New Hebrides, Admiralty Islands. 

 Admiralty Islands. 

 Ternate. 



Ray of Bengal. 

 Hyalonema-ground, Japan. 



8. 

 'J. 



scuparia, Wright & Studer 



crassa, Wright & Studer . 



variabilis (Hickson) . 



macrospiculata, Thomson . 



squarrosa (Kolliker) . . 

 (Syn. Siphonogorgia squarrosa.} 



pendula (Studer) Amboina. 



(Syn. Siphonogorgia pendula.) 



pendula var.ternatana (Kiikenthal). Ternate. 



pendula var. bengalensis, var. n. . Bay of Bengal. 



macrospina, Whitelegge . . . Funafuti. 



indivisa (Kiikenthal) .... Ternate. 

 (Syn. Spongodes indivisa.) 



Maldive Archipelago, Indian Ocean. 

 Indian Ocean. 

 West Australia. 



