12 Mr. R. Kirkpatrick on 



field Banks is a small one, but includes one specimen of great 

 interest, viz. a new species of Stephanoscyphus, Allman. 



With the exception of a specimen of Millepora verrucosa, 

 the Hydrocorallinse are represented merely by small fragments. 



SlPHONOPHORA. 



Physalia utriculus, Eschscholtz. Off Macclesfield Bank. 

 Velella, sp. Young forms in the " Rataria " stage. 

 Porjnta, sp. No specimens were preserved, but sketches 

 were taken from life. 



HYDROCORALLIN.E. 



Stylaster flabelliformis, M.-Edwards & Haime. Garvan Reef, 



2 fath. 



■ pulcher, Quelch. Garvan Reef, 2 fath. 



Distichopora violacea, M.-Edwards & Haime. Garvan Reef, 



2 fath. 



irregularis, Moseley. Garvan Reef, 2 fath. 



Millepora ramosa, Pallas. Tizard Reef, 10 fath. 



verrucosa, M.-Edwards & Haime. Tizard, \ fath. 



Hydroida. 

 Sertularia distans, Lamouroux. Tizard, 27 fath. 

 Aglaophenia MacGillivrayi, Busk. Tizard, 5 and 27 fath. 



The specimens of Aglaophenia are loaded with corbulas. 

 They vary slightly from the descriptions of Busk and Allman, 

 but not to the extent of being specifically distinct. In the 

 Tizard specimens the branches are shorter and more rigid, and 

 the ridges of the corbulee more prominent and interdigitating 

 than in the ' Challenger ' one. 



Genus Zygophylax, Quelch. 

 Zygophylax tizardensis, n. sp. (PL III. fig. 3.) 



Trophosome : colony about 1^ inch in height, the main 

 stem bearing pinnately -disposed alternate ramuli and pinnate 

 branches in one plane. Main stem polysiphonic, branches 

 gradually becoming monosiphonic towards the periphery. 



Hydrotheca? half-immersed on main stem, free and sub- 

 stipitate on branches : oral end bent outwards and constricted 

 at the bend ; one or two annuli concentric with margin of 

 orifice ; with a knobbed chitinous ring internally at the base 

 and a half-ring at the upper dorsal part, for muscular attach- 



