118 REPORT—1850. 
The author added descriptions and figures of new species, viz. Pagurus Dillwynii_ 
and Pandalus Jeffreysii. 
A List of Sertularian Zoophytes and Polyzoa from Port Natal, Algoa Bay, 
and Table Bay, in South Africa; with Remarks on their Geographical 
Distribution, and Observations on the Genera Plumularia and Catenicella. 
By Grorce Busk, F.R.S. 
The 17 species of Sertulariade belonged to the following genera, viz. Sertularia, 
9 species ; Plumularia, 5 species; Thuiaria,1 species; Antennularia, 2 species. The 
species of Sertularia were, as far as they could be ascertained,—1. Sertularia argentea ; 
2. S. rosacea; 3. S. polyzonias; 4. S. abietina; 5. S. operculata; 6. S. nigra; 7. 
S. arbuscula? ; 8.8. unilateralis?; 9. S. Gaudichaudi. With respect to the first six 
of these, no remarks appear to be called for, as they correspond in all respects with 
the species of the same name in the British Fauna. The Sertularia operculata of 
South Africa is undoubtedly the same species as the British, although from a rather 
general deviation from the more usual toothing of the margin of the cell, which ob- 
tains in specimens from the southern hemisphere, this variety has been denominated 
Sert. or rather Dynamena bispinosa by Mr. Gray. This species appears to be of a 
cosmopolitan character, occurring in Europe, South Africa, Australia, New Zealand, 
and in at least one of the South Sea Islands; specimens from the latter locality, 
differing merely in colour, which is in them deep brown. The seventh species, here 
named S. arbuscula, is most probably that species, which is one of those described by 
Krauss, but stated by him to come from New Holland. This statement may, how- 
ever, probably turn out to be incorrect, as the species in question does not occur 
among those sent home from H.M.S. Rattlesnake from Australia. The eighth 
species, which does not appear to have been previously described, is characterized by 
the position of the double series of cells toward one side of the rachis, in consequence 
of which the polypidom affords something of the aspect of a Plumularia. It may 
prove to be the Sertularia unilateralis of Quoy and Gaimard, although in their figure 
of that species the cells are much wider apart than in the specimen from Algoa Bay. 
The species of Plumularia are :—1. Plumularia formosa (Busk) ; 2. Plumularia, sp. ὃ ; 
3. P. falcata; 4. P. pennatula?; 5. P.cristata. There is a sixth very small species, 
but so closely resembling P. cristata, that it is not deemed advisable at the present 
time to separate them. The species named P. formosa is of a beautiful feather-like 
habit, growing in simply pinnate fronds of a deep brown colour, from two to nearly six 
inches high. As it does not appear to have been hitherto distinctly described or 
named, it is designated as above, with the following characters :— 
P. erecta, pinnata, subincurvata; cellulis crenatis, dentatis, rostro antico elongato 
basi utrinque spicato; processu rachidis antico inferiori canaliculato: processibus 
lateralibus rachidis, canaliculatis, brevibus. Capsulis ovarialibus, elongatis, costatis. 
Hab. Africa austr. 
The second species also appears to be unnamed, but as, from its size and remark- 
able habit, it can scarcely have escaped notice, it is thought better not to name it on 
the present occasion. It has a remarkable shrub-like aspect, having a very thick 
and strong stem, irregularly branched, the ultimate ramules pinnate, pinnules small, 
in proportion to the size of the rachis. The cells are cup-like, with several shallow 
indentations, and a sharp ascending point anteriorly. The anterior rachidian process, 
and also the two lateral ones, are long and of uniform diameter. ; 
With respect to the species of Plumularia, it was remarked that four out of the five 
belonged to that group of this artificially constructed genus, of which Plumularia 
cristata may be taken as the type, and of which the most striking characteristic 
hitherto noticed is the pod-like, costate, ovarial capsule. It- was pointed out, how- 
ever, that this group is not distinguished from the rest of the species in this genus, 
with which it has been artificially associated, by this character alone, but by several 
others also, sufficient perhaps hereafter to justify the erecting of the group into a di- 
stinct genus. Omitting the peculiar and elegant feather-like port of most of these 
species, there may be noticed more particularly the existence on each side of the rachis 
of the pinne, and on a level with the upper part of the cells, of a short curved or 
straight process, usually tubular, but sometimes only channelled, which is continuous 
APSE tases 
κὡὼ δς γος" Ὁ ΓΝ 
