20 



have however a slight scale. The gastropores are round or oval and have a diameter of 

 0,3 mm.; the style grows to a great size in old pores. The gastrozooid has four or five tentacles. 

 The ampullae are large and prominent and often bear ridges in addition to the verrucae of the 

 dactvlozooids. The female ampullae are 1,2 mm. in diameter. No male specimens were observed. 



This species seems to be most closely allied to E. carinata (Pourtales), but the latter 

 is distinguished by having all the gastropores on one surface. 



The species may be defined; 



Hydrophytum subflabellate, ramose ; gastropores in the angles of the branches without 

 a scale, less frequently on the surface with a slight scale ; dactylozooids scattered, forming 

 prominent verrucae. 



Distichopora Lamarck. 



1 . Distichopora violacea Milne Edwards and Haime. 



MlLNE Edwards and Haime. Hist. Nat. des Cor. V, III, p. 451. 



Stat. 152. N.W. of Waigeu Isl. Dredge and reef exploration. Up to 32 M. 1 Ex. 



A young colony 1 7 mm. high, growing in two parallel flabella. The colour is violet, 

 white towards the apices of the branches. 



Cryptohelia Milne Edwards and Haime. 



MlLNE Edwards and Haime. Hist. Nat. des Coral, p. 127. 

 Moseley. Chal. Zool. Vol. II, p. 98. 



The genus may be defined as follows : Coenosteum arborescent, flabelliform. Pores in 

 regular cyclosystems only; cyclosystems turned towards one surface of the flabellum ; styles 

 absent in gastropore and dactylopore ; gastropore divided into two chambers, upper and lower ; 

 the opening between the two is circular. Gastrozooids without tentacles; dactylozooid partially 

 retractile only. Ampullae in connexion with the cyclosystems, usually prominent-, several female 

 and numerous male gonophores in each ampulla ; the male gonophore without a spadix : Sterrula 

 larva long and vermiform. 



Cryptohelia is a deep sea genus of wide distribution. The following are the depths at 

 which it has been found : 



C. piidica Milne Edwards and Haime. Depth ? 



C. pmiica from the Siboga Collection. 1300 — 1633 M. 



C. moseleyi (C. pitdica Moseley, specimen figured). 1525 fms. (=2745 M.). 



C. piercei Pourtales. 267 — 600 fms. (=471 — 1050 M.). 



C. japonica {Endohclia 'japonica M. E. & H.). Depth? 



The Siboga new species are : 



C. ramosa 11 65 — 1264 M. C. balia 1300 — 1633 M. 



C. pacliypoDia 1089 „ C. stenopoma 1300 — 1633 „ 



C. p la typ oma 469 „ 



