The species may be defined ; 



Hydrophytum subflabellate; nematophores on stem and septa ; lid small, thin and narrow; 

 edge of cyclosystem exsert and crenate; ampullae round, or on the two sides of the cyclosystem 

 in the male, at the base of lid in the female. 



Conopora Moseley. 

 Moseley. Chal. Zool. Vol. II, p. 97. 



The genus ma)- be defined : 



Coenosteum arborescent, not flabelliform. Pores in regular cyclosystems only, their 

 apertures turned in all directions; styles absent in gastropores and dactylopores; gastropore 

 with two chambers upper and lower, which are separated by a circular opening. Gastrozooids 

 and dactylozooids connected by a broad canal (fig. 35). 



Ampullae occur in the male as a slight swelling around the cyclosystems; very numerous 

 gonophores in each ampulla. Female ampullae unknown. 



C. tennis Moseley and C. inajor from this collection, are the only two species of the 

 genus. The type specimen of the former occurred off the Kermadec lis in 520 fms. (936 M.). 

 The same species was found by the Siboga in 469 M. off New Guinea. The new r species C. 

 major was found a depths of 204 and 1901 M. off Kei islands and N.E. Celebes. 



1 . Conopora tenuis Moseley. 



Moseley. Chall. Zool.: Vol. II, p. 97 and 82. Hydrocorallines. PI. XII, figs. 5, a, b and 6. 

 Off Kermadec lis. 520 fms. 



Stat. 156. o°29'.2S., I30°5'.3E. N.W. of New Guinea. 469 M. 3 Ex. 1 dead. 



The three colonies are all about 20 mm. in height. The cyclosystems are usually 0,8 mm. 

 in diameter. The ampullae, which were not described by Moseley, occur in the male as slight 

 swellings round the base of the cyclosystems. No female colonies were found. 



Colony not flabellate ; 20 mm. in height; main stem stout, hollow, fistulose and coalescing, 

 inhabited by a polychaet worm; cyclosystems 0,8 mm. in diameter, ampullae as swellings round 

 the cyclosystems. 



2. Conopora major sp. n. Plate III, figs. 33, 34 and 35. 



Stat. 251. 5°28'.4 S., 132 o'. 2 E. Kei lis. 204 M. Two colonies and one fragment. 



Stat. 119. i°33'-5N., I24°4i' E. N.E. Celebes. 1901 M. Two examples, one dead. 



This species is closely allied to C. tennis, in the general method of growth, but is not 

 so delicate as the latter. The height and breadth of the two most complete colonies are 

 30 • 20 mm. and 35 15 mm. respectively. The hollow central stem, inhabited by a polychaet 

 worm, is about 7 mm. in diameter near the base. The branches occasionally coalesce and 

 arise irregularly from the surface of the main stem, though in one colony there is a slight 

 indication of flabellate growth, owing to the branches being rather longer on two, opposite, 



SIBOGA-EXrEDITlE VIII. 4 



