Of the thirty-one species, it appears strange that not less than twenty-five should here be described as new; and there can be no doubt many so described are included under the vague and uncertain descriptions of Lamarck and Lamouroux; but, in the absence of authentic specimens, or trustworthy figures, I have found it impossible to identify satisfactorily the species described by them, and have therefore thought it better to assign new names rather than to apply former ones, which would in all probability prove incorrect. It is hoped, at all events, that the descriptions here given will be found sufficient to prevent any misconception of what is intended in the following catalogue.
The mode in which the species are arranged will be seen from the following synoptical arrangement:
SYNOPTICAL ARRANGEMENT OF THE GENERA AND SPECIES OF SERTULARIAN ZOOPHYTES COLLECTED ON THE VOYAGE OF THE RATTLESNAKE.
Order. ANTHOZOA HYDROIDA.
Sub-order. SERTULARINA.
Fam. 1. SERTULARIADAE.
Gen. 1. Sertularia.
§ 1. Cells alternate (Sertularia).
(a) Cells distichous.
1. S. elongata.
2. S. divaricata, n. sp.
3. S. crisoides.
(b) Cells secund.
4. S. pristis.
§ 2. Cells opposite (Dynamena).
(a) Cells distichous.
5. S. subcarinata, n. sp.
6. S. patula, n. sp.
7. S. orthogonia, n. sp.
8. S. mutulata, n. sp.
9. S. operculata.
10. S. divergens, n. sp.
11. S. trigonostoma, n. sp.
12. S. digitalis, n. sp.
13. S. loculosa, n. sp.
14. S. unguiculata, n. sp.
15. S. tridentata, n. sp.
2. Pasythea.
16. P. hexodon, n. sp.
3. Plumularia.
§ 1. Angiocarpeae.
17. P. huxleyi, n. sp.
18. P. hians, n. sp.
19. P. delicatula, n. sp.
20. P. aurita, n. sp.
21. P. brevirostris, n. sp.
22. P. ramosa, n. sp.
23. P. divaricata, n. sp.
24. P. phoenicea, n. sp.
25. P. longicornis, n. sp.
26. P. macgillivrayi, n. sp.
§ 2. Gymnocarpeae.
27. P. effusa, n. sp.
28. P. campanula, n. sp.
Fam. 2. CAMPANULARIADAE.
4. Campanularia.
29. C. volubilis (?)
30. C. dumosa.
5. Laomedea.
31. L. torressii, n. sp.
Order. ANTHOZOA HYDROIDA.
Suborder. SERTULARINA.
Fam. 1. SERTULARIADAE.
Gen. 1. Sertularia, Linnaeus.
1. Cells alternate (Sertularia).