Chap. VI. TABULAR VIEW. 267 



Nausithoe Kdll, 1853. — Octogonia, 1852, J. Midi, Gesellsch. Nat. 



Freunde; and Arch. f. Anai, 1854, jj. 97. 



N. punctata Kdll, Zeit. f. wiss. ZooL, 1853, IV. p. ZIZ. — Messina 

 (Kolliker). 



N. marginata Kdll, Zeit. £ wiss. ZooL, 1853, IV. p. 323. — J/es- 



sina (Kolliker). 

 N. albida Gegmh., Zeit. f. wiss. Zool., 1856, VIII. p. 'IW. — Messina 

 (Gegenbaur). 

 3d Sub-order. HAPLOSTOME^ Agass. See page 9, where the characters of 

 this sub-order are compared with those of the SemaeostomeBe. 

 Thus far, these Medusa) have been associated with the naked- 

 eyed Acalephs, but their structure (and what is known of 

 their mode of development) brings them nearer to the true 

 DiscophoriB, than to the Hydroidae. On p. 59 of the third 

 volume, I have alluded to the Hydroid affinities of the genus 

 Lucernaria. A closer comparison induces me to adopt, to 

 some extent, the view of Huxley, Avho refers these singular 

 animals to the type of the Discophoraj. But I cannot agree 

 with him in bringing them, as he does, into such close prox- 

 imity with the highest Discophora), and separating them 

 altogether from the group which he has called Medusida;, 

 most of which correspond to this sub-order of Haplostomese. 

 Lucernaria is closely allied to Marsupialis and kindred genera, 

 and these, with ^gina and Cunina, must be separated from 

 the other naked-eyed MedussB, and referred to the Disco- 

 phorjfi proper, but as a distinct and inferior group. The use 

 Huxley makes of the name LucernaridjB, to designate the 

 true Discophoraj, is certainly unfortunate, and likely to lead 

 to misapprehensions; it is also contrary to usage, which 

 requires older names to be retained, as far as possible. 

 1st Family. Thalassanthe.i5 Lesson, 1843. — .^ginida) Gegenl., Zeitsch. f wiss. 

 ZooL, 1856, VIII. p. 258. 



Long before Gegenbaur, Lesson had already separated the 

 .iEginidae from the ^quoridae, as a distinct family, under the 

 name of Thalassanthe.e. I do not understand why Gegen- 

 baur did not adopt this name; for Lesson's family, tribe as 

 he calls it, contains exactly the same genera as Gegenbaur's. 

 Euryale Per. and LeS., 1809. 



E. antarctica Per. and LeS. — Furneaux LsUnd (Peron and LeSueur). 



