5()2 Dr. W. II. Harvey’s Account of the Marine Botany of 
(264). Much resembling the last in aspect, but not distichous in any part ; and with re- 
markably curled pinnules. I name it in compliment to Mrs. Eichaed Brown of Fremantle, 
an amateur collector of Algse, from whom and her estimable husband I received much 
kind attention during my stay in their neighbourhood. 
303. Callithamnion laricinum, n. sp. ; fronde cartilaginea setacea (1-3 unciali) fere ad apices 
ramorum corticata glabra quoquoversum ramosa ambitu pyramidal!; ramis alternis paten- 
tibus superne sensim brevioribus ramulis dichotomo-multifidis undique obsessis; ramulis 
pluries dichotomis, segmentis paten tibus, ultimis brevissimis spinseformibus ; favellis gemi- 
nis oblongis ! simplicibus v. furcatis ; tetrasporis globosis ad latera ramulorum sparsis. On 
Zostera at Eottnest, common (200). This has the aspect and substance of C. tdragonum ; 
but is more nearly related to C. granulatiim or G. grande. 
304. Callithamnion n. sp. ; fronde erecta crassiuscula alterne decomposito-ramosa 
omnino ecorticata; ramis ramulisque quoquoversum egredientibus, terminalibus corym- 
boso-flabellatis, ramulis dichotomo-multifidis fastigiatis ; apicibus obtusis patentibus ; favel- 
lis geminis rotundatis ramulis stipatis (quasi involucratis). On Zostera at Eottnest, and at 
Garden Island on Algce (201). Nearly allied to C. corymbosum, but a more robust, though 
smaller plant; with cells more like those of a Griffithsia than of a Callithamnion. 
305. Callithamnion 7nultijidum, n. sp. ; fronde pusilla (unciali) arachnoidea ecorticata dense ca;s- 
pitosa alterne ramosa ; ramis simplicibus ramosisve, ramulis alternis quoquoversis dicho- 
tomo-multifidis; segmentis patentibus obtusis; articulis ramorum basi incrassatis diametro 
4-plo, ramulorum cylindraceis diametro 2-3-plo-longioribus. On sand-covered rocks, half- 
tide level, generally buried in the sand, the grains of which adhere closely to the filaments. 
Eeefs at Eottnest, May and June (229). 
306. Callithamnion n. sp.; fronde pusilla (|—^ unciali) capillar! ecorticata caespitosa 
inferne quoquoversum, superne distiche ramosa; ramis superioribus e rachide flexuosa 
alterne plumulatis; plumulis brevissimis alterne pinnatis, pinnis 3-4 simplicissimis filifor- 
mibus elongatis obtusis eximie arcuato-inflexis ; articulis omnibus diametro sesquilongiori- 
bus; favellis geminis; tetrasporis In shady crevices of rocks, at half-tide level, 
Eottnest. Near G. Borreri, but a much smaller plant, and sufficiently characterized as 
above (228 a). 
307. Callithamion piisillum, n. sp. ; fronde pusilla (vix unciali) capillar! ecorticata CKspilosa in- 
ferne simpliciuscula superne quoquoversum ramosa; ramis inferne plumulatis, superne 
alterne ramosis, ramis minoribus e rachide strictiuscula quoquoversum plumulatis ; plu- 
mulis brevissimis vix pinnatis; pinnis 2—3 alternis v. secundis elongatis obtusis arcuatis 
iiiflexis; articulis omnibus nisi basilaribus diametro 3-plo-longioribus ; favellis geminis; 
tetrasporis globosis ad latera pinnarum solitariis. Crevices of rocks, at half- tide, Eottnest 
(228 /3). At first I had this for a variety of C. crispulum, but it differs in not being in any 
part distichous, and in the longer articulations. 
308. Callithamnion (Scopw/a, n. sp. ; fronde pusilla (unciali) capillari ecorticata quoquoversum 
ramosa, ramis paucis cum ramulis ambitu clavatis quoquoversum plumulatis ; plumulis in- 
ferioribus brevibus, superioribus elongatis pinnatis ; pinnis simplicibus filiformibus longis- 
