62 
PACIFIC SCIENCE, VoL XIII, January 1959 
1. The ultimate cells of the whorled lat- 
erals in Cronaniopsis are more elongate than in 
Gulsonia annulata. 
2. Gulsonia annulata forms ” gland” cells; 
Crouaniopsis apparently does not. 
3. Tetrasporangia of Gulsonia annulata are 
formed on cells of the third order of the 
whorled laterals; in Crouaniopsis on cells of 
the second order. 
4. In Crouaniopsis the spermatangia have an 
apical nucleus (Feldmann-Mazoyer 1940: 
166), while in Gulsonia annulata the nucleus 
is median. 
Direct comparison with preserved material 
of Crouaniopsis may show other differences, 
but they are clearly specifically distinct. Ow- 
ing to the identity of the specific names, 
Kylin (1956) renamed the later species of 
Berthold. The genus Gulsonia thus comprises 
two species: 
Gulsonia Harvey 1855 
Gulsonia annulata Harvey (1855 : 334; I860: 
320, pi. I93A; 1863 : synop. 614). J. G. 
Agardh (1876 : 88; 1894 : 122, pi. II, f. 13; 
1897 : 56). Kuetzing (1866 : pi. 66 c - e). 
De Toni (1897 : 66; 1924 : 151). Schmitz 
(1889: 435-456). Schmitz and Hauptfieisch 
(1897 : 329-331). Womersley (1948 : I6I; 
1950 : 178). Feldmann-Mazoyer (1940 : 
279). Kylin (1956: 373). 
DISTRIBUTION: Euck, Western Australia to 
Georgetown, Tasmania. 
Gulsonia mediterranea Kylin (1956: 373). 
SYNONYMY : Crotiania annulata Berthold 
(1882:518); Crouaniopsis annulata (Berthold) 
J. and G. Feldmann (1940: 181). 
DISTRIBUTION: Western Mediterranean. 
REFERENCES 
Agardh, J. G. 1876. Species, Genera, et Ordines 
Algarum 111 (1). 
1894. Analecta algologica, Cont. I. 
Acta Univ. Lund 29 : 1 - 144, pi. 2. 
1897. Analecta algologica, Cont. IV. 
Acta Reg. Soc. Physiog. Lund 8:1- 106. 
Berthold, G. 1882. Ueber die Vertheilung 
der Algen im Golf von Neapel, nebst 
einem Verzeichniss der bisher daselbst beo- 
bachteten Arten. Zool. Stat. zu Neapel, Mitt. 
3 : 393 - 536. 
Feldmann, J., and G. Feldmann. 1940. 
Crouaniopsis, nouveau genre de Ceramiacee 
Mediterraneenne. Comptes Rend, des Seances 
de r Academie des Sci. 210:181 - 183. 
Feldmann - Mazoyer, G. 1940. Recherches 
sur les Ceramiacees de la MHiterranee Occi- 
dentale. Algiers. 
Fritsch, F. E. 1945. The Structure and Repro- 
duction of the Algae. Vol. II. 
Harvey, W. H. 1855. Short characters of 
some new genera and species of algae dis- 
covered on the coast of the colony of Vic- 
toria, Australia. Ann. and Mag. Nat. Hist. 
15:332 - 336. 
I860. Algae. IN J.D. Hooker, The 
Botany of the Antarctic Voyage, Part III. 
Flora Tasmaniae 2: 282 - 343. 
1863. Phycologia Australica Vol. 5, 
synop. 6l4. 
Kutzing, F. T. 1866. Tabulae Phycologicae 
Vol. 16. 
Kylin, H. 1956. Die Gattungen der Rhodophy- 
ceen. Lund. 
Schmitz, F. 1889. Systematische Uebersicht 
der bisher bekannten Gattungen der Flori- 
deen. Flora 72:435 -456. 
Schmitz, F., and P. Hauptfleisch. 1897. 
Rhodophyceae. IN Engler and Prantl, Die 
Natur lichen Pflanzenfamilien 1:327-335. 
De Toni, G. B. 1897. Sylloge Algarum omnium 
hucusque Cognitarium. Vol. 4. 
1924. Sylloge Algarum omnium hucusque 
Cognitarium . Vol. 6. 
Womersley, H. B. S. 1948. The marine algae 
of Kangaroo Island II. The Pennington 
Bay region. Roy. Soc. So. Austral., Trans. 
72(1):143- 166. 
1950. The marine algae of Kangaroo 
Island III. List of species I. Roy. Soc. So. 
Austral, Trans. 73 (2):137 - 197. 
