226 



THE VOYAGE OF H.M.S. CHALLENGER. 



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

 fathoms. 

 ,, collaris, n. sp.; Arafura Sea, 140 fathoms. 



26. 

 27. 

 28. 

 29. 



Jlahellifera, Stucler ; Enoshima, Japan. 



spinulosa, Gray ; Indian Ocean. 



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



C. Divaricatse. 



a. UiiibeHatse. 



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



31. ,, pustulosa, n. sp.; Tahiti, 80 to 40 fathoms. 



32. ,, monticulosa, n. sp.; Torres Strait, 28 fathoms. 



33. ,, divaricata, Gray ; New Guinea. 



34. ,, ramulosa, Gv&y \ Bellona Reef, 17 fathoms. 



35. ,, Tdunzingen, Studer {ramulosa, Klunz.) ; Eed Sea. 



yS. Laxw. 



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



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



38. ,, cervicornis, n. sp.; Tahiti, 30 to 40 fathoms. 



39. ■? ,, unicolor, Gray ; Bellona Reef, 17 fathoms. 



40. ,, gracilis, Verrill ; Loo Choo Islands. 



Subfamily 2. SiPHONOGORGiNiE. 



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

 bounding the canals of the 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 Nephthya and Ammothea, and sometimes, in the most extreme cases, it 

 calls to mind species of the Gorgonidge. 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 KoUiker's subfamily Siphono- 

 gorgiaceae, in that we include here quite new forms wdiich would not come within the 



