Jenutryl 

 1057 J 



Ksksuaw, faurti/fa? F.vnu(t of )Vrst tfrW, Tas. I : ' 



MidH*!vraI : Initially ttte mollusc McUw>-*is:i mWflif.Wrn,.?/!? Srrtiih is dfrlt!- 

 iiai:l and i> very plentiful H5T ai JeaM thirty feet. This i* not rvjjicat nf rtfhei 

 Tii-.Jtuntati shores and, resembles Ihe occurrence of this mollusc in Victoria. 

 ]ii Tasmania, at leait irqni Bridport east, Mcitrnvritj U a relatively mi- 

 huptiriani specie*, and this seems to bo irue also in Oil* far north-west and 

 wwt On the parent transect il i> found over much of cbe -Oiorc, but is enly 

 dominant ahovc the warn barnacle SQflB ft is accompanied by BeH&tciutn- 

 ftffiirwr Lamarck rather sparsely, with Anstrocorhlni cmtjtrirtn Lamarck and 

 tf, ia*«*m<mi/i7 Wood under stones. Mchnvtita may be seen in numbers on 

 the surface just airtir ibe tide, ha* ebbed but Inter move under Atones,. Hfl** 

 ttctilfti'ly *s Tne heat Or the sun takes «ff-ect. AustrQcoefyhft i'omiti(t(\ U well 

 distributed, bul not especially plentiful, however, in one oi the entail indenta- 

 tion* on ait area of flat shingle with plentiful water at &H times low on the 

 shore it is vtry plentiful. The barnacle TdmcHfj JWif^w&tfCTtf (Wood) 

 occurs very sparsely and most specimen? geen were dead. 



B&ntvcie r?<Jif* On the transect the barnacles occupy between iurty Stud 

 fifty feet of the shore, but iVic acm<? is very variable in cunsiUwiou and 

 depih a« well as in width, Th? species are Chthtwwlus (Dttj-iuitiius Da/win, 

 an<j Chomacsipttrt c&lwma (Spengler) with the eroded forin of Tstrashia 

 purfiffosceiis pkutiiul m more sheltered positions between TocJn;. Large 

 uncrodecl specimens o$ thii latter species occur above tlte zone a£ already 

 mentioned, while uneroded juveniles occur near the foot ol the mid-littural. 

 The total depth occupied by the hamades on the .shore is in the vicinity of 

 rune feet, Km the actual area w whn.h they are dominant is very much 1efcj>. 

 In fjeiicral the zone is easy to trace airing the shore At one nomi a count of 

 eleven hundred individuals of the flm two species was made to the square 

 foot, but only a few feet away only one hundred were present. This is ap- 

 parently due to the uneven and broken surface. On larye boulders the. 

 oarnaeles tend to congregate on the south-east faces, that is. i>oi directly 

 Facing the open sea. On the sewwafit side they fcre more or less isolated ; hut 

 on the platform, boulder* may be covered o» the upper >urfdcc 



Below the barnacle je£no, the alga Hormosim {hiul'sti appears in gutters. 

 Numerous Bcmlyicuan .ittrf Ausirm'0\'hlca seek shelter amongst the growth. 

 Also observed wen: two sptcics of star-fish, one individual at the pulmouatc. 

 Quihvitfhi poteflottfes Quvy & Gaimard. $'xf>Ji<iroehifuri watujeomx tredale 

 & May, groups oi Mvtfiuhs pulcx Lamarck, and the anemone, itft&ixQ 

 faijrfy^ (Farq.). .•h-tinui is plentiful, notab/y in poofs, bin* at t)ie southern 

 end of the headland ir is sparsely distributed beneath stones, M^ontfortula 

 eiajtunjrn ICeeve and Si, riujoso Quoy i' Gaimard first appear at this point, 

 on the aJsrae. The limpet thia.uuiuco flaminca var, mixta Kecvv is also 

 ropr.e<enteii hy a few individuals. 



PatcUa'd Zant: The limpets ate sparsely distributed and the rotk looks 

 rafller barv- between the concentration of the bssfti&de? and that of &ltto* 

 larwt. €t'fi(vt« SftH&l is- distributed over the exposed surface of this narrow 

 "bare" area, which is soon taken tip hy patches of tiny luwacks C'iuwme- 

 sifltn anil TfhacHta (uneroded) and patches of .snvaJI, liahtly j^acWed 

 .ModiMus putcx. \a elsewhere cm the north c«>ast of Tasmania, .\1odt.tilns 

 occurs in pure populnlions, fjut at West Head it is cor.fi/ied to sma)l patches 

 perhap* a foot in extent. In Ihe West Ann ol the Tamar River it it much 

 tnore expensive ant! the individuate are itftijcli larger. The ^ceateit devellop- 

 ii>*ut Ol the specie;, however wa? seen ht Bndport oil the uf>rth-east sector 

 of the iH-'t* toa^t wliete tli* bivalve cover* large areas of the granrtc 

 bouhkrs- iind ts of "'normal" sijee. 



O^ the sides of houfdors and gutter* or [toots, Siphonsirta dienw/mtsu 

 Quoy & Gaimard i? plentiful. The >ea lettuce. Ohm WIM& iS not touirnoa 



