Kirkpatrick — Hydroida and Polyzoa, Torres Straits. 619 



area on its upper face ; later the area becomes partly covered by 

 a calcareous reticulum, and finally wholly calcified on the surface. 

 This variety is a distinct and very interesting one. In the 

 typical form the zoarium is escharan, and the zooecia are long 

 and oval, and the surface uniformly areolated. The opercula 

 are similar in both. 



Habitat. — Loosely adnate to rock : Murray Island, Torres 

 Straits, 15-20 fms. 



Lepralia filamentosa, n. sp. 

 (PI. xvi., fig. 5.) 



Zoarium free, dome-shaped, concavo-convex ; zooecia in radiat- 

 ing lines, alternate. 



Zooecia large, *7 x -5 mm. ; rectangular ; upper surface uni- 

 formly punctured by large round pores. 



Orifice quadrangular ; rising from the proximal border a small, 

 scroll-like mucro, from the outer convex surface of which rises a 

 thick calcareous process branching out into membranous filaments ; 

 three similar spines rising directly from the postero-lateral margin 

 of the orifice. 



Dorsal surface of zooecia smooth, transparent, bound by raised 

 lines. 



Ooecia ? 



Operculum, -24 mm. in length x -26 in width, with a slightly 

 concave proximal border, and a thick rim round the rest of the 

 margin. 



Habitat. — Growing free : Murray Island, Torres Straits, 15-20 

 fms. 



Smittia spathulata, Smitt. 



(PL xvii., fig. 1.) 



Escharella spathulata, Smitt. — " Flor. Bry." n. p. 60. 



Smittia reticulata, var. spathulata, P. Mao Grillivray. " Trans. 

 Eoy. Soc. Vict." xix., p. 135, PI. III., fig. 14. 



Smittia spathulata, Mac Gillivray. " Cat. Mar. Pol. Vict." 

 p. 27. 



SCIEN. PROC. R.D.S. VOL. VI., PART X. 2Z 



