" ENDEAVOUR " SCIENTIFIC RESULTS. 1 72 



diameter at the end is less than at the middle, so that they 

 contrast strongly with those of the u wine-glass " type. As in 

 all the allied forms the supracalycine sarcotheca? spring from a 

 pair of lateral enlargements of the hydrocaulus, these enlarge- 

 ments however are so slight that they do not appear in a side 

 view, consequently the so-called " pedunculate " appearance of 

 the sarcothecae is not apparent. 



I have not seen the male gonangia, but have little doubt they 

 will be found to agree in form with those of the closely-allied 



P. 



The specimens were found mixed with the root-fibres of a 

 larger Plunaularian (A<jl<>i>li<'ni<t </r/nt<i). 



Loc. Thirty eight-miles north-east of North Reef Light- 

 house, Capricorn Group, off Port Curtis, Queensland, 74 fathoms. 



PLUMULAIUA SULCATA, 



(Plate xxxv., figs. 6-7.) 



Plumularia sulcata, Lamarck, Anim. s. Vert., 1816, p. 128; 

 Bale, Cat. Austr. Hyd. Zooph., 1884, p. 145 ; Billard, 

 Ann. Sci. Nat.. 9 ser., v, 1907, p. 321 ; Ritchie, Mem, 

 Austr. Mias., iv, 1911, p. 852, pi. Ixxxiv, fie:. 3, pi. Ixxxix. 

 fig. 5 ; Id., Proc. Roy. Soc. Edin., xix, 1913, p. 6. 



Pluinidarni aijJoplie>ioides, Bale, Cat. Austr. Hydr. Zooph., 

 1884, p. 126, pi. x, fig. 6. 



Hydrophyton reaching eighteen inches or more in height, 

 polypi phonic, with numerous ascending branches, stem and 

 branches thick, flexuous, giving rise to two series of monosi- 

 phonic pinnately-disposed alternate branchlets, one from each 

 flexure; branchlets continued uninterruptedly from some of the 

 fascicle-tubes of the stem or branch, their proximal portion 

 separated from the rest by two distinct oblique joints, less dis- 

 tinctly jointed for the rest of their length, bearing hydrothecse 

 as well as hydrocladia, Hydrocladia alternate, close, one on each 

 internode of the branchlets, both series borne towards the front 

 and supporting a hydrotheca on each internode ; nodes oblique, 

 sometimes very strongly marked at or near the ends of the 

 hydrocladia, but mostly obsolete. No septal ridges in the 

 i iternode. 



Hydrothecae large, close, campanulate, set at an angle of about 

 45, border circular, entire except at the back, which has a 

 broad sinuatiou. 



