EXPLANATION OF PLATE LXXXIX. 



Fig. I. — Ifalicornopsis elegans {h-AmaiVck), hydrotheca. y = lateral 

 flaps from internodes, uniting with side of hydrotlieca 

 s.ap — median supra-calycine sarcopore behind hydro 

 theca : i = internal thickening of hydrothecal wall 

 6.rt/j. =antero-basal aperture of hydrotheca, through 

 which polyp enters. Station 48 — x 150. 



Fig. 2. — Cladooarpus bathyzonatus, sp. nov., colony from Station 

 57 — Nat, size. 



Fig. 3. — Halioornaria thetidis, sp. nov., portion of hydroclade 

 with hydrothecse. A = hydrotheca ; ss. = supracalycine 

 sarcotheca ; m.s. = median sarcotlieca — x 70. 



Fig. 4. — Halicornaria thetidis, sp. nov., part of stem with bases 

 of two hydroclades, anterior aspect. A = hydroclade ; 

 c?.c.s. = distal anterior cauline sarcotheca ; ^.c.s. = prox- 

 imal anterior caidine sarcotheca ; p.s. = posterior cauline 

 sarcotheca— x 40. 



Fig. 5. — Phiniularia sulcata, Lamarck, lower part of hydroclade 

 with hydrotheca, anterior aspect, i.s. =internodal sar- 

 cotheca; l.s.s. = lateral supracalcyne sarcotheca; m.s s. ~ 

 median supracalycine sarcotheca ; h = hydrotheca ; m s. 

 S5 median sarcotheca. Station 48 — x 70. 



Fig. ^,— Cladocarjnis hathyaonatus, sp. nov., part of h}droc]ade 

 with hydrotliecee, anterior aspect, s.s. = supracalycine 

 sarcotheca; A = hydrotheca ; iw.s. = median sarcotheca; 

 n = node — the horizontal lines are chitinous thickenings 

 in the internode seen through the hydrotheca. Station 

 57— x42. 



Fig. 7. — Cladocarjnis bathyzojiatus, sp. nov., part of hydroclade 

 with hydrotheca?, lateral aspect, s.s.(l) = sipracalycine 

 sarcotheca with double terminal aperture; ^ r. =diininii- 

 tive intrathec d ridize in form of a short flap covering 

 opening at base of hydrotlieca; m.s. =me.iian saico- 

 theca ; r = one of the chitinous ridges in the iutei node ; 

 w = node; s.s.(2) = supracalycine sarcotheca with triple 

 terminal aperture. Station 57 — x 42. 



Figs, 8, 9, 10, 11. — Cladooarpus hathyzonatus, sp. nov., series 

 showing the development of the median sarcotheca of 

 the hydrotheca. Station 57 — x 185. 

 8. — Lateral aspect ; simple terminal and basal apertures. 

 9. — Half-front aspect, terminal aperture elongated. 

 10. — Half-front aspect ; the walls have joined between the 

 extremities of the elongate aperture, and thus two 

 apertures have been formed. 

 11. — Half-front aspect — each of the two terminal apertures is 

 raised on a short process. 



