Coughtrey. — Notes on the New Zealand Hydroidese. 293 



Fig. 20. Habit of Sert. abietinoides, showing character of branches and 



pinnae, and mesh work of hydrorhiza. Half nat. size. 



21. Characters of hydrothecse and hydrocaulis of & 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 



hydrothecse; b, b, gonangia; c, hydrothecse in which liydranth 

 is replaced by the peduncle of gonangium. 



25. Synthecium elegans, from Stewart Island specimen. It bad 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 sub-articulata. 



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



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



b, broken portions of shells entangled in hydrorhiza. Half 

 nat. size. 



36. One of hairy branchlets of A. antennina magnified, after Johnston. 



a, hydrothecse ; b, intermediate cellules. 



37. Plumularia pennatula. 



38. Plumularia huttoni. 



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



40. Plumularia incisa. 



41. Mouth of hydrothecse in PI. incisa. 



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



b and c, different forms of 

 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 Campanidaria 



bilabiata. 



47. Long variety of gonangium in Campariularia bilabiata. 



48. Short „ „ „ „ „ 



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



