BEYOZOA FKOM FRANZ- JOSEF LAND. 



167 



occur at a bifurcation, but is a central inflation, involving one or 

 two series of zooecia. In most of tlie few ovicells found the 

 ovicellular duct cannot be distinguished ; but in one, though 

 somewhat broken down, it is seen as a narrow opening close up 

 to the zocecial tube. Busk figures the ovicell in his British 

 Museum Catalogue, but does nob refer to it, whereas Hincks 

 describes but does not figure it. Smitt figures an ovicell at a 

 bifurcation, but as his figure relates to an " Alecto stadium," we 

 cannot be sure whether he has seen the ovicell of I. atlantica, 

 nor can we be sure of the localities from which he obtained his 

 1. atlantica. 



A more delicate form has been described as var. tenuis, and it 

 is not always certain whether the variety is referred to. The 

 ' Challenger' specimen from Simon's Bay is more delicate than 

 the common Arctic form. 



Log. Spitzbergen {BidenJcap) ; Barents Sea ; Kara Sea ; Jan 

 Mayen, 15-180 metres; Scandinavia; G-reenland ; Finland; 

 NovayaZemlya; British coasts ; Florida; Japan, 200 fath. ; and 

 Busk, in the 'Challenger' Eeport, gives Nightingale Island; 

 Kerguelen ; Cape of Good Hope; Cape Horn Exp.: Station 

 unknown (Waters), Antarctic, lat. 70° S., long. 80° 48' W., 

 500 (?) fathoms. 



Jackson-Harmsworth Exp. : Lat. 77" 55' N., long. 53° 20' E,, 

 130 fath., and lat. 77° 55' N., long. 53° 16' E., 130 fath.; 

 50 miles JS'.W. of Cape Mary Harmsworth, 53-93 fath. and 

 234 fath. 



5. Ijdmonea fenestrata, Busk. 

 Tuhulipora fenestrata, Smitt, "Krit. Fort." 1866, p. 399. 

 Idmonea fenestrata, Bidenkap, " Bry. Spitzbergen,'' Fauna Arctica, 

 vol. i. p. 528. 



There is a worn specimen which I think is the species referred 

 to by Smitt. It is a stout form, frequently branching, with the 

 solid dorsal part much wider than the front, and with wide lines 

 on the dorsal surface. Three or moi-e zooecia to a series, which 

 are confined to the front part of the zoarium. 



A question has been raised as to whether the 1. fenestrata of 

 Busk and of Smitt are identical. 



Zioc. Spitzbergen {Smitt; and Bidenkap, 100 metres). 



Jackson-Harmsworth Exp. : Lat. 77° 55' N., long. 53° 16' E., 

 130 fathoms. 



