290 RECORDS OF THE AUSTRALIAN MUSEUM. 



Fascicle tube, diameter ... ... ... 007 iiiin. 



Axial tube, diameter ... ... ... ... up io 0"-i5 mm. 



Hydrotlieca, leiigtli of adnate portion ... 0"28-0'31 mm. 



Hydrotheca, length of free portion ... ... O'08-O'IO mm. 



Hydrotbeca, greatest diameter ... ... O'lO-O'l'i mm. 



Distribiitiiui. — Hitherto recorded only from Station 4-4, off 

 Coogee, New Soutb Wales, 49-50 fathoms (Ritchie). 



Genus Perisiphonia, AJljintn. 



Perisiphonia exserta (Jtilnison). 



t'rjptularia exserf((, Johnson, Quart. Journ. Micro. Sci., vi., 

 1858, [). 130, pi. xix., tigs. 3, 3a, 3b. 



Fen'si'pJioiiia jilicitht, Allman, Rep. Sci. Results "Challenger" 

 Exped., Zool., xxiii., 1888, Hydroida, }). 44, pi. xxii., 

 tigs. 1-4. 



Perisiphonia exsert((, Ritchie, Mem. Austr. Mus., iv., 16, 1911, 

 p. 834, pi. Ixxxvii., tig. 3. 



A solitary specimen agrees with the description of I'erisi- 

 l>]ioiiia exserta (Johnson) given by Ritchie. The colony is 53 

 mm. in heiglit, with a diameter of 06 mm. at the base. 



IJ 



uiieiisHiiis 



Pei'ipheral tube, diameter ... ... ... 0"05-0"06 mm. 



Hydrotheca, length aduate to axial tube ... 0"33-0"34 mm. 



Hydrotlieca, length free from axial tube ... 0'1--0'15 mm. 



Hydrotheca, diameter at mouth ... ... 1:^ mm. 



Sarcotheca, length-^ ... ... ... ... 0"05-0"06 mm. 



Sarcotheca, diameter ... ... ... ... 0"035 mm. 



Distance between adjacent hydrothecje on 



hydroclades^ ... ... ... ... 0"47-0'51 mm. 



•* From the surface of the peripheral tube to the tip. 



!* Measured fi'oni the base of one hydrotheca to the baso of the next 

 on the same side of the axial tube. 



