ENDEAVOUR" SCIENTIFIC REsri/rs. 166 



IV. REPORT ON THE HTDROIDA, II. 



I. INTRODUCTION. 



This Second Report is mainly devoted to the description of a 

 few new .species which oiily came under notice after the former 

 Report was in the hands of the printer. Again the Plumularians 

 predominate, and are of interest as including types of Aglao- 

 pheuia and Halicontariit not previously known from Australian 

 localities. 



A number of other species, already known, also occur in the 

 collection, a complete enumeration of which is deferred to a 

 Third Report, in which it is proposed to summarize the results 

 obtained up to the present. 



II. DESCRIPTIONS OF THE GENERA AND SPECIES. 



FAMILY LAFOEID^. 

 Genus CKYI'TOLARIA, Bad-. 

 CRYPTOLARIA ANGULATA, sp. >tv. 

 (Plate xxxv., fig. 1.) 



Hydrophyton about three inches in height, branched and re- 

 branched in one plane ; branches irregular, neither opposite nor 

 alternate, slender, fascicle-tubes not numercms. 



HydrothecjB alternate, long, lower half erect, finally enclosed, 

 upper half sharply curved at right angles and the free part then 

 projecting outward and very slightly upward, its diameter some- 

 what greater than that of the proximal part ; a boss-like pro- 

 jection from the hydrocaulns into the hydrotheca just below the 

 bend ; border circular, smooth, often with several renewals, very 

 slightly everted. 



Gonosome. 



This species is particularly characterized by the sharply 

 genicnlate outward bend, with the noticeable crease in the angle, 

 also by the distinct boss projecting into the hydrothecal cavity, 

 opposite the crease. Immediately after the bend the axis of the 

 hydrotheca is at a right angle with that of the lower portion, but 



