Kirkpatrick — Hydroicla and Polyzoa, Torres Straits. 609 



The distribution of this species is interesting. Between Shet- 

 land and Faroe (cold area), 345 and 630 fms. (Allman, "Porcu- 

 pine") ; Holborn Island, 20 fms. (Bale) ; off Somerset, Cape York, 

 2-8 fms. (Allman, " Challenger ") ; Murray Island, 15-20 fms. 

 (Haddon). 



Diphasia scalar if or mis, n. sp. 

 (PI. xv., fig. 3). 



Hydrocaulus irregularly branched, forming tufts about 1*25 

 inches in height. 



Hydrothecse, in pairs, adnate to one side of the rachis, and to 

 each other ; upper outer half of hydrotheca expanding, alate, 

 sinuous ; surface of stem and hydrothecse marked with longitu- 

 dinal serrations and delicate horizontal lines. 



Gtonothecse, in a single line along front rachis, adpressed to 

 hydrothecse, oval, sub-sessile, marked with strong curved spines on 

 upper surface ; under surface smooth. 



Length of hydrothecse, *4 mm. ; width of a pair at widest 

 part, "4 mm. 



Habitat.— Twenty miles N.N.W. Warrior Island, 5j fms. ; 

 growing on Aglaophenia huxleyi. 



Sciurella indivisa, Allman. 



Sciurella indivisa, Allman, " Challenger " Hydroida, I. p. 26, 

 PI. V. 



Antennularia cylindrica, Bale. Cat. Zooph., p. 146, PI. X. fig. 7. 



At first the arrangement of the ramules is bipinnate, each half 

 of the pinna being composed of ramules arranged "two-deep." 

 Higher up the bipinnate arrangement is obscured, the ramules 

 growing along three or four sides of the stem, as in Antennularia. 



In the British Museum Collection is a specimen acquired from 

 Dr. v. Lendenfeld, labelled "Antennularia cylindrica, Bale, Port 

 Curtis Type," and there was therefore no difficulty in settling the 

 synonomy. 



Kirchenpauer 1 refers to a specimen of Plumularia cylindrica, 



1 Kirchenpauer, Pluniularidse. Abhand der Nat. Ver. Hamburg, p. 45, Taf. i. 

 and iv. fig. 1, 1876. 



