CouGHTREY. — Fotes on the New Zealand Hydroidese. 293 



Fig. 20. Habit of Sett, ahietinoides, showing character of branches and 

 pinnse, and meshwork of hydrorhiza. Half nat. size. 



21. Characters of hydrothecse and hydrocanlis of S. fusiformis. 



22. Side view of gonangium of Sert. fusiformis. 



23. Outside view of gonangium of Sert. fusiformis. 



24. Synthecium elegans, after Allman (magnified ?). a, ordinary 



hydrothecsej h, h, gonangia j c, hydrothecse in which hydranth 

 is replaced by the peduncle of gonangium. 



25. Synthecium elegans, from Stewart Island specimen. It had no 



gonangia present. 



26. Synthecium gracilis, from Timaru. 



27. Synthecium gracilis. Southern variety. Notice its smaller size 



and the character of joint between hydrothecse. 



28. Typical characters of hydrorhiza in Synthecium gracilis. Timaru 



specimens. 



29. Marginal view of gonangium of Synthecium gracilis. 



30. Full view of gonangium of Synthecium gracilis. 



31. Habit of Syn. gracilis, from Timaru specimen. Half nat. size. 



32. Portion of pinna of Thuiaria suh-articulata. 



33 and 34. Different views of gonangia of T. suh-articulata. 



35. General habit of Antennularia antennina. a, spongy hydrorhiza; 



h, broken portions of shells entangled in hydrorhiza. Half 

 nat. size. 



36. One of hairy branchlets of -4. antennina magnified, after Johnston. 



a, hydrothecse ; h, intermediate cellules. 



37. Plumularia pennatula. 



38. Plumularia huttoni. 



39. Plumularia simplex, a alternates with h, h. 



40. Plumularia incisa. 



41. Mouth of hydrothecse in PI. incisa. 



42. Part of a single hydrocaulis of Laomedea geniculata. a, hydrothecse ; 



h and c, different forms of gonangia in situ. 

 43 and 44. Other forms of gonangia in L. geniculata. 



45. Campanularian allied to C. Integra, yet undescribed. a, cells of 



frond of seaweed to which it is attached. 



46. Upper part of pedicel, and the hydrothecse of Campanularia 



hildbiata, 



47. Long variety of gonangium in Campanularia hilahiata. 



48. Short „ „ „ „ „ 



49. Habit of Camp, hilahiata. Half nat. size. 



