Marine Algae.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 517 



vol. i, p. 69, tab. 70, 1847. Rhodomela glomerulata (partim). Hook. f. & 

 Harv., Handb. N.Z. Flora, p. 665, 1855. StreUodadia neglecta, Schmitz 

 and Falkenberg, Engler and Prantl's " Pflanzenfamilien," Algae, p. 457, 

 1897 ; Falk., " Die Rhodomelaceen," p. 354, 1901. 



Auckland Islands ; d'Urville, Hooker, R. M. L. (New Zealand.) (Identified 

 by A. Gepp.) 



Fam. CERAMIACEAE. 



Griffithsia, C. Agardh, 1817. 

 Distribution. — All seas. 



A fragment of an alga probably belonging to this genus was collected by Mr. 

 Crosby Smith at Enderby Island. {Vide Plate XXIII, figs. 1, 2.) 



Callithamnion, Lyngbye. 

 Distribution. — All seas. 



Callithamnion cryptopterum (Hook. f. & Harv.), Kiitz. 



Callithamnion micropterum, Hook. f. & Harv., Fl. Antarct., vol. i, p. 192, 1847. 

 C. cryptopterum, Kiitz., Sp. Alg., p. 646, 1849. 



Auckland Islands ; Hooker. 



A little-known and not recently collected species. As Montague had previously 

 described a distinct species from the Canaries as C. micropterum, Kiitzing altered 

 the specific name of this plant to C. cryptopterum. 



Callithamnion gracile, Hook. f. & Harv. 



Callithamnion gracile, Hook. f. & Harv., Fl. Antarct., vol. i, p. 191, tab. 78, 

 fig. 1, 1847. 



Campbell Island ; Hooker. 



A little-known and not recently collected species. 



Ptilothamnion, Thuret, 1877. 

 Distribution. — Probably in many seas. 



Ptilothamnion pectinatum (Mont.), R. M. L. 



Callithamnion pectinatum (?), Mont., Voy. au Pole sud, Bot., i, p. 90, 1845 ; 

 Hook. f. & Harv., Fl. Antarct., vol. i, p. 191, 1847. Ptilothamnion pectin- 

 atum, Laing, " New Zealand Species of Ceramiaceae," Trans. N.Z. Inst., 

 vol. xxxvii, p. 388, 1905. 



Auckland Islands ; d'Urville. The Snares ; J. C. S. ! (Stewart Island.) 

 I previously described {loc. cit.) this plant from specimens obtained from Half- 

 moon Bay, Stewart Island, and identified it somewhat doubtfully with Montague's 

 C. pectinatum. My previous specimens were somewhat immature ; and the present 

 ones, collected at the Snares by Mr. Crosby Smith, are much larger, and present 

 various differences in branching from the Stewart Island specimens. 



