ovillis depositis Molluscorum aliorumque animalium discernen¬ 
dis. In Ulvinis sporae (ovula) quaternam vitelli animalis par¬ 
titionem non excedunt; frons earum, quandoque maxima, cum 
disco prolifero folliculi Graafiani v. stromate ovarii exuberante 
comparanda. In ordinibus Algarum helerosporarum auctores di¬ 
scernunt: fila confervoidea, antheridia, gongylos et sporas, v. 
keramidia, coccidia, favellidia et sphaerospermia Agardb, 
cystocarpia et tetracbocarpia Kiitzing (cistulae et tetraspori- 
dia nobis); interim gongyli Ceramiearum dimorphi aeque, nec 
non articuli separati Ceramii eorallini, germinantes visi sunt 
(vid. Duby, Memoires sur le groupe de Ceramiees 1832-5). 
In Characeis primo globuli rubri (antheridia?) apparent, filis 
confervoideis pleni, in quorum articulis spermatozoa longissima 
(Meyen) vel animalcula vivacissima, tentaculis mobilissimis 
(Thuret), evolvuntur; serius — gemmae (articuli caulis con¬ 
tracti, sporocarpia Bischoff); quaenam spermatozois functio? 
an gemmas intrant illasque foecundant?. Summus Algarum 
ordo, alibi aegre inserendus. 
Class . III. polyparii. Familiae 16. 
0. I. Tricuophyta nob . 
1. Galaxaurini (Aplosporeae, Decaisne): Lia- 
gora, Neomeris, Cymopolia, Actinotricbia, Galaxau- 
ra, Dichotomaria, Alysium. 
2. Corallinini (Choristosporeae D-ne): Jania* 
Corallina, Arthrocardia, Amphiroa, Melobesia (Ma- 
stophora, Nullipora, Spongites). 
3. Halimedini (Zoosporeae D-ne): Polyphysa 
et Acetabularia? — Halimeda, Udotea, Avrainvillaea, 
Penicillus, Chamaedoris, Espera. 
4. Spongi ini: Ephydatia (Spongilla), Spongia 
— plura genera autorum, Alcyoncellum Quoij et 
Gaim Tbaumasia? 
O. II. Lithophyta; familiae sec. Ehrenberg: 
1. Milleporini, dodecactinii. 
