CLASSIFICATIONS OF ZOOPHYTES. 
71 
IV. Nud a. 
Polypi naked, the mouth with marginal tentacula. 
Coryna. 
Hydra. 
Latreille’s method may next be noticed. He, following La- 
marck, divides the animal kingdom into three primary sections, 
the last of which is denominated Acephala, which, with various 
other classes, includes all the Zoophvta. The Actinia and Lu- 
cernaria constitute a distinct class — Helianthoida — which is 
placed between the sea-stars (Echinodermata), and sea-jellies, 
(Acalepha), being superior to the latter and to zoophytes by 
their organization, in which Spix had detected a nervous system. 
The Polypes follow the sea-jellies, and are subdivided thus : 
Order I. Brachiostoma. 
Mouth encircled with tentacula , often retractile. 
Family I. Calamides. Pennatula, Virgularia, &c. 
— -II. Alcyonea. Lobularia, Alcyonium, &c. 
III. Alveolaria. This family is portioned into tribes. 
1. Lamellifera — the P. lamelliferes of Lamarck. 
2. Foraminosa — the P. foramines of Lamarck. 
3. Corticifera — the P. corticiferes of Lamarck, with 
the genera Penicillus and Flabellaria. 
4. Reticularia — the P. a reseau of Lamarck. 
5. Vaginiformia — the P. vaginiformes of Lamarck. 
6. Spongites — the sea and fluviatile sponges. 
— IV. Lim nopolypi. 1. Tentacula retractile ; a sheath— 
Plumatella, Cristatella, Difflugia. 2. Tenta- 
cula non-retractile ; no sheath — Pedicellaria, 
Coryne, Hydra. 
Order II. Trichostoma. 
No tentacula at the mouth , which are replaced by rotatory organs or 
cilice. 
Family I. Cancriformia — Brachionus, Follicularia, Tubicolaria. 
II. Campanulata — Vorticella, Urceolaria, Furcularia. 
III. Caudata— Vaginicola, Tricocercus, Ratulus. 
Not having access to the original works, I pass over in silence 
the methods of Oken, Schweigger, and Van der Hoven, the 
