140 KtxsHAW, Inttriufal fasm of Wtst Html, Tot. [Tgj ^ 



urt the surfa.ee PotettcUu aliUostata (Angus) npncars h\i\ is more plentiful 

 among the GflJiCd/itla. niij below. 



GoUoltttitt ?pH$* Gftltolivin cmspitnsti Vamarrk forms a thin veneer 

 over the rock, making a conspicuous white zone, which is approximately 

 two feet hi depth) tferw.rnlly less. It does not develop masses of tubes in this 

 exposed area, but does to to some extent near (ireeu'r .Beach where the 

 tubes provide some shelter (or iUo»ffortn!r,t autl other forms fcurft us the 

 biVailtt KtsfHA Mtl#$h I*ifo?rek The large chUon Potur^r'h.i albida 

 Blainville is present, and one specimen was taken nn the warm rubes, Potdl- 

 Iflidn iilticctxtata U generally covered by the tubes, while immediately brhw 

 them on the smooth rock Cclltimt uilida reappears, with tfrc addition of 

 Cotutcmucit snbu>uf:<hfa (Artgas>> Sypiwrochlton vumqeowii, Atislrocovbk'a 

 i-n)U(rirta t and At C'jutQnwtota ate present throu^hout- 



ffcrmosv'o bank tit (Turn,) ?)fvQiAuc F/fHiticwaU well developed below 

 (the Oolf^hfi'T zone and cmnmimly has Cystofrhorn associated with ft. These 

 algae sheher nutnemus ^aftropodv linnrvtiw covrrs a gond deal of the 

 surface but is not continuous. It appear** to reach its maximum development 

 near the worm tubes and helenv them It is ot Rome importance in sheltering 

 the fauna. 



CortttHur attjtic A tvrl of coralline;, is present at the foot of Ific Mid- 

 lithiral. Molluiea are plentiful and include the gast t'OfooS Dtitilhais bails Mxa 

 (Tenison -Woods ), Cotnhicila luieoluttt (Lamarck), .$nl>niiw?Ja tmdnftita 

 f Snfandei }, AuMrocvrhlca couenmzrata (Wood). Chtarodiloma od^ntis 

 (Wood), while helow stouer. there are juvenile Faxciotarht (PleitrHploctt), 

 MkrastrueO owea (Jonas). :Volvh<tfio(\y ruber (LeuCh), and the chitons, 

 {.uhnoihiion clonqcttnt (BlciiMvtHe), and hrhnoradskt tfvanidv (Sowetby), 

 The bivalve Kvllia australis h aUn present beneath stones when irere arc 

 also- present sponges and other encrusting organisms to "which n often 

 adhere*. Several small gastropods are often attached ami others; are parttv 

 buried n» the debris below. The alsrae hacbot;t Otners ot the %moM forms; 

 hnwever, ft h not inlrnded to discuss these here. A small crab unknown fol 

 the wriLer, is also present. 



hifralittiytal Friugt: The algae appear to form a dense population ficm 

 here for some distance off-shore. The t>ttt is important not only to the fauna 

 it harbours, hut also to the shore as there is a noticeable deadening oi the 

 wave avti'_'ii at low water. Among others PhyUo&t-'orv ivtttvsn 1a nonces!, 

 but the constituent species have nut been investigated. 



Ascidians arc present but do not appear of importance. 



Summary 



'I hese notes have been made while investigating the mollusca and hence. 

 ti-rVr partie.ulaily to these anunaJs. The mam species appearing on the shote 

 have htcn noted and gcucratly show similar feature* of orr.urence to those 

 of other pai'tt of the north coast of Tasmania which have been visited 1j> the 

 ainhnt Individual d»flerence» oi importance cccut, such ait that ol the 

 development of MnUioUts M Rrlc!pi>rt which m&y he due to (oral condition' 

 • if llic eiLV*\ron4nent. There are some aflioities with the VicUinan coast, o( 

 which the mo*t noticeable is the development of McUnwrUn which here is 

 the most e\ten-sivc yet seen in Tasmania. The exposure is not oceanic ami 

 jacks spei.ies found only on such Stores. It is considerable, however anii 

 'here is a nice #radt/i* of espoutre with eoi.sef|itent variation in cou<ritiHion 

 a? the. shore is followed easterly to GrceiV? Reach. However, markedly 

 sheltered conditions do not occur a* they do for example at Stanley where 

 the exposure grarfes iniO a sheltered mud IUt with numerous Salinntor 

 r.oiida, l>ut rhese soon give way to npen bead* conditions with usual North 

 Coast beach bivalves, as at Green's Beach. 



