Ejrkpatrick— Hydroida and Polyzoa, Torres Straits. 605 



Total species of Hydroida, recorded from Torres Straits, 32 : 



TuBULARiNiE, 4 species. Sertularin^;, 11 species. 



Campantjlarin^:, 5 species. Plttmtjlarin^i, 12 species. 



The above list includes four new species, viz. : — 



Coryne vel Syncoryne cylindrica, Eudendrium infundihdiforme, 



n. sp. ii. sp. 



Cladocoryne haddoni, n. sp. Diphasia scalariformis, n. sp. 



Coryne vel Syncoryne cylindrica, n. sp. 

 (PL xiv., fig. 1.) 



Hydrocaulus consisting of a creeping network of slender tubes 

 invested by a horny perisarc. 



Hydranths sessile, stout, cylindrical, about "4 mm. in height, 

 without horny perisarc; tentacles about 15 in number, clustered 

 on the upper half of the hydranth, capitate, sub-sessile. Gono- 

 some not present. 



Habitat. — Growing with Cellepora granulosa. Albany Pas- 

 sage, 8 fms. 



As it is uncertain whether reproduction is effected by means of 

 fixed sporosacs or by free medusiform gonozooids, it is impossible 

 to determine to which genus this species belongs. 



The habitat of the specimen is very curious. A slender net- 

 work was seen on the dorsal surface of a small fragment of 

 Cellepora granulosa. On examining more carefully the upper sur- 

 face of the Polyzoon, the heads of the Hydroid were seen in the 

 angles between the zooecia. To satisfactorily examine the Hy- 

 droid, it was necessary to decalcify the Cellepora. 



The absence of horny perisarc from even the base of the 

 hydranths may be due to the peculiar habitat of the species. 



Cladocoryne h addon i, n. sp. 



(PL xiv., fig. 2.) 



Hydrocaulus consisting of straight, simple stems, attaining a 

 height of from 1 to 2 mm. and rising from a simple, creeping stolon • 

 the stems with two annulations at the base, and increasing slightly 

 in diameter, from below, upwards. 



2T2 



