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



25. Spongodes bicolor, n. sp. ; Torres Strait, 3 to 11 fathoms; Samboangau, 10 



fathoms. 



26. „ collaris, a. sp. ; Arafura Sea, 140 fathoms. 



27. „ fiahelUfera, Studer ; Enoshima, Japan. 



28. ,, spinulosa, Gray ; Indian Ocean. 



29. „ heterocyathus, n. sp.; Torres Strait, 3 to 11 fathoms. 



C. Divaricatae. 



a. Umhellatse. 



30. Spongodes coronata, n. sp.; Torres Strait, 8 to 10 fathoms. 



31. ,, pusfidosa, n. sp.; Tahiti, 30 to 40 fathoms. 



32. „ monticidosa, n. sp.; Torres Strait, 28 fathoms. 



33. ,, divaricata. Gray ; New Guinea. 



34. „ ramulosa, Gray; Bellona Reef, 17 fathoms. 



35. ,, klunzingeri, Studer (ramulosa, Klunz.) ; Red Sea. 



j8. Laxse. 



36. Spongodes laxa, n. sp. ; Arafura Sea, 140 fathoms. 



37. ,, rhodosticta, n. sp.; Arafura Sea, 140 fathoms. 



38. ,, cen-icornis, n. sp.; Tahiti, 30 to 40 fathoms. 



39. ? ,, iinicolor, Gray ; Bellona Reef, 17 fathoms. 



40. „ gracilis, Verrill ; Loo Choo Islands. 



Subfamily 2. Siphoxogorgin.e. 



In this subfamily we include all the Nephthyidae in which the partition walls, 

 bounding the canals of tlie stem and branches, are rigid and filled with spicules. 

 Hence the species of this subfamily have a firmer and more rigid consistence than 

 the species of Spongodinse exhibit. The general form of the colony sometimes still 

 recalls species of Neplithija and Ammothea, and sometimes, in the most extreme cases, it 

 calls to mind species of the Gorgonidte. The thicker the spicules are packed in the 

 internal dividing walls of the canals the more can the colony develop in height and in 

 the extent of its ramifications, which thus allows of an advantageous arrangement and 

 distribution of the polyps. 



The subfamily is understood here in a wider sense than Kolliker's subfamily Siphono- 

 gorgiaceae, in that we include here cj^uite new forms which would not come within the 



