202 Transactions. — Zoology. 



form. Lips entire, contracted by a joint where they join hydrorhiza. Spores 

 arranged in several spiral rows around blastostyle. 



Habitat. — Fuci, one to three fathoms, Timaru ; delicate seaweeds; growing 

 from roots of Laminarians. 



This species well illustrates what I have noticed in other species, that 

 there is a sensible difference in size, even in same species, in those I have got 

 on southern beaches as contrasted with those got on eastern beaches, the latter 

 being by far the largest. Figs. 46—49. 



Greene, in Manual of Ccelenterata, p. 128, mentions that there is a species 

 of Gryptolaria (a Sertularian) found in New Zealand, other members of this 

 genus being found in Madeira. 



I have collected a few more species than I have had time to describe, but 

 I hope to contribute on the same subject to next year's Transactions. 



Description of Plate XX. 



Note.— All objects magnified 50 diameters, except where otherwise specified. 



Fig. 1. Sertularia johnstonii. Typical specimen, a and b, different views 



of the hydrothecae. 



2. Variety of Sertularia johnstonii, possessing the oblique joint. 



3, 4, and 5. Different forms of gonangiums of Sert. johnstonii. 



6. Position and form of hydrothecse on secondary branches of S. 



monilifera. 



7. Gonangium of same. 



8. Sertularia simplex. Type. 



9. A variety of S. simplex. Shows its relation to & polyzonias. 



10. Another var. of S. simplex. Shows still better the relations of this 



species to S. polyzonias. 



1 1 . Gonangium of S. simplex. Type. 



12. Part of a ramule of S. ramulosa, showing hydrothecse and 



gonangium. 



13. Habit and general form of Sertularia ramulosa. Half nat. size. 



14. Sertularia trispinosa. Fig. 16 gives form of gonangium. 



15. a, one of the varieties of S. trispinosa ; b, the second variety of 



S. trispinosa j this shows well its plumularian habit. Half 

 nat. size. 



16. Gonangium common to Sert. trispinosa, Sert. bispinosa, and Sert. 



abietinoides. 



stunted process mentioned in the text. 



isjyinosa. Gonangium shows the 



magnified. 



19. Profile view of gonangium common to Sert. trispinosa, Sert. 



Uspinosa, and Sert. abietinoides. 



