EXPLANATION OF PLATE LXXXVII. 



Fig. 1. — Cryytolaria conjerta, var. australis, var. nov.,^^ part of 

 slightly fascicled branch with hydrothecse, Station 42 — 

 x40. 



Fig. 2. — Perisiphonia 2Jectinata, Allman, part of fascicled "pinna" 

 of Alhnan's type specimen, from " Challenger " Station 

 169, off Mew Zealand, i^asc. = fascicle tube; A = hydro- 

 theca with many reduplicated margins, the profile 

 beneath the fascicle tubes faintly outlined ; s = sarco- 

 theca — X 50. 



Fig. 3. — Perisipnonia filicula, Allman, part of fascicled 'pinna" 

 Station 57. a = outline of axial tube ; yasc. «= fascicle 

 tube ; h = hydrotheca ; s = sarcotheca — x 50. 



Fig. 4. — Cryptolaria crassicaulis, Allman, ^^ part of branch of 



Allman's type specimen from "Challenger" Station 344, 



off Ascension Island, showing hydrotheca. AtL, level at 



which base of polyp was attached to hydrothecal wall — 



x40. 



Fig. 5. — Cryptolaria crassicaulis, var. dimorpha, var. nov.,^^ 

 part of branch, Station 48, showing hj'drotheca. Att., 

 level at which base of polyp is attached to hydrothecal 

 wall — X 40. 



Fig. 6, — Cryptolaria crassicaulis, var. dimorpha, var. nov., part 

 of colony. Station 48, showing in the lower part, a 

 stolon creeping upon a Polyzoon, and bearing two simple 

 La/oea-\ike hydrothecse, but afterwards developing into 

 an erect typical Cryptolaria colony — x 10. 



Fig. 7. — Cryptolaria arboriformis, sp. nov., ^^ part of fascicled 

 branch with hydrothecse, Station 44 — x 40. 



Fig. 8. — Halecium sessile, Norman, Station 54. Parts of branch 

 showing variation in length of internodes — x 40. 



Fig. 9. — Halecium sessile, Norman, Station 54. Parts of branch 

 showing variation in length of internodes — x 40. 



"^For the sake of comparison, the figures of the various species of 

 Cryptolaria (except Fig. 6) have been drawn with the same magnification. 



