480 MISS E. 8. BARTON ON THE 
wall peculiar to the peripheral cells of H. lawa. The habit and 
branching are also different. 
37 fathoms, off Tutaga. 
A. 34. HALIMEDA LAXA. 
35 fathoms, Tutaga. 
A. 54. HALIMEDA CUNEATA, Kuetz. Tab. Phyc. vol. vii. tab. 21. 
fig. lil. ; var. ELONGATA, nov. (Pl. 18. figs. 4, 5.) 
Ad 25 cm. longa sed imperfecta; vage ramosa. Articuli 
simplices costati, plano-compressi, 7 mm. longi, medio 3-4 mm. 
lati, ad extremitatem quamque angustati, 15 mm. lati; 
articuli ramigeri, tripartiti, costati, plano-compressi, circa 
1 em. longi, superne 7-9 mm. inferne 1-1:5 mm. lati; margine 
undique acuto; utriculis corticalibus 50-60 u longis, 33 u diam. 
This may possibly be a new species, but in the present un- 
satisfactory state of the genus it seems wiser to consider this 
plant for the present a variety of ZH. cuneata, Kuetz. It differs 
from the description of H. cuneata in Prof. Askenasy's Alg® of 
the ‘ Gazelle’ (7. c.) in the greater length of the whole plant, 
and the small size of the peripheral cells, which in the ‘ Gazelle’ 
specimen measure 50 p across. The general form of the joints 
recalls, however, those of H. cuneata, Kuetz. H. cuneata, 
Hering, is a different plant, although Kuetzing’s figure quoted 
above is supposed to represent it.  Kuetzing's plant must, 
therefore, on the revision of the genus, receive a new name. 
H. Opuntia, Lamour, var. MACROPUS, Ask. 
From 40 fathoms, ocean slope of reef, Funamanu, brought up 
alive. 
A. 58. HALIMEDA CUNEATA, Kuetz., var. ELONGATA. 
H. MACROLOBA, Decne. 
Fragment of H. OPUNTIA, Lamour, var. MACROPUS, Ask. 
Falefatu, 25 fathoms. 
B. 5. HALIMEDA OPUNTIA, Lamour, var. MACROPUS, Ask. 
B. 10. HALIMEDA MACROLORA, Decne. ? 
The peripheral cells of this plant measure 50 u across, and it 
appears to be identical with the plant recorded under this name 
by Prof. Askenasy (/.c.) from Dirk Hartog Island, West Australia. 
He gives, however, among the references to H. macroloba the 
figure in Harvey's Phye. Austr. tab. 267, which represents no. 
562 of Harvey's Australian Algw. This plant has been made the 
