^ Mo L A monthly publication since 1969. ISSN 0747-6078 1701 Hyland St. Bayside, CA 95524 Tanzania: Shelling on Dar es Salaam’s Offshore Reefs Lewis R. Macfarlane, Deputy Chief of Mission. U.S. Embassy KATHMANDU, U.S. Department of State, Washington, DC 20520 The United Republic of Tanzania, off the beaten path and wracked with economic problems, is nonetheless a rewarding destination for the resourceful traveler. Besides the better known attractions — hospitable people, a rich and varied historical and cultural tradition, some of the world’s greatest game parks and reserves, Mt. Kilimajaro, Zanzibar, Ngorongoro Crater — it is also prime territory for divers, snorkelers, and shellcrs. In the immediate vicinity of Dar es Salaam, the capital, there are inviting sand beaches, islands, and patch and fringing reefs. What follows is an account of a few hours off Bongoyo Island, just north of Dar es Salaam .... 0855 - Off from the Dar Yacht Club, on the good ship Five Cent Cigar (as in "What this country needs is a Good ....") This is, in fact, a modest inflatable with an Evinrude 15. In the excellent company of Mike Gould, USIS’s head man hear, I head off toward Bongoyo, a few miles to the north. 0920 - Arrive at Bongoyo. Water is flat and clear, but we still sneak up on the reef carefully. Check equipment, the minimum in 85 degree water: prescription mask, snorkel, mesh collecting bag, fins and, after a moment’s hesitation, no T-shirt (a decision to be questioned the next day). 0923 - No time to waste. Into the water, check the anchor, and into the shelling area, which means clearing the 20-30 foot "deeps" off the reef, moving through the fringe staghorn, soft and broken coral, a rainbow of fish, and into the lagoon. 0926 - Exchange of salutes with a couple of timid but bad customers — a stonefish, atypically stretched out on the sand, and a moray eel, guarding what looks like a common Conus leopardus under a chunk of brain coral. These waters are incredibly benign if you keep your hands in view and your feet off the bottom. The only real killer is the stonefish and, like most of his less lethal colleagues, he’s not looking for a fight — quite the contrary. July, 1985 — Vol. 17, No. 7 $2.50 0931 - A little close exploring in a sandy bay flanked by low coral walls. Turning over loose coral slabs and fanning the sand (a surprisingly little-used and vastly rewarding enterprise) turns up the following; two Conus arenatus, one mature, one small and delicate, both with a slight greenish cast which will come off with cleaning; Conus tessalatus, with vivid orange dashes on white, and a purple tip; and a perfect orange and white Terebra guttata, cruising along an inch or two below the sand but betrayed by a faint trail. 0935 - Heading over a coral shelf, some promising-looking chunks conceal a pair of beautiful Conus nussatella and a dead but prime condition Conus generalis. A few yards over, almost concealed by algae and other growths on the back, but betrayed by the shape (for those who have been looking for a while) a small, perfect Lambis crocata. This species often has one or more of its seven spines broken off, but not this specimen. Into the bag. 0950 - Time for a change of pace — to the less colorful coral slabs near the tideline. Cowry country. A few minutes’ search turns up C. annulus, carneola, helvola, Isabella, lynx and erosa. This is not a heavily shelled area by Sanibel standards, but these are already well represented in the collection, so back they go. Today’s tide is particularly good for shelling/snorkelling, a minus -.3 (meaning three tenths of a meter below mean low) in this part of the world where the range is about 13-1/2 feet. One of todays’s bonuses is particularly good access to that soft white coral which is the habitat of Procalpurnus lactea, locally known as the small egg cowry. Sure enough, there’s a whole family out today on one yard-wide, spongy coral head, grazing, covered by smooth gray-black mantles. I take one and leave the rest. A few minutes later, Procalpurnus' larger relative — Ovula ovum, with a gold-flecked, jet-black mantle in contrast to the pure white shell underneath, grazing on some greenish soft coral. With several in the collection, I go on by. 1010 - Parts of the inner reef area are a mix of eelgrass and broken coral/shells, yet another sub-habitat with its own population. This one is a favorite hangout for octopus (hint: dig around their holes in the sand; today’s search turned up an impeccably cleaned but still perfect Conus stratus: Cypraea tigris, not as common here as it used to be; bubble shells {Bulla ampulla), ubiquit- ous, strictly brown-and-white but handsome. These usually turn up dead but sometimes one encounters colonies of live ones, usually gobbling up something else.) Another find is Strombus lentiginosus L. — no rarity here, but with beautiful butterscotch-colored aperture, soulful eyes, a snappy foot action. If the eyes don’t convince you to throw him back, the backward flip may have the same effect anyway. 1024 - Back to the boat for a quick beer. On the way, my eye is caught by some promising-looking slabs in deeper water just off the reef. One of these turns up little of interest. But the other, after some tugging, flushes out not only a moray (who takes off for a neighboring hideout) and also three distinct finds; Conus vexillum, a striped brown-orange beauty with white patches; a Lambis scorpius\ and — bingo! — a Cypraea scurra Gmelin. This specimen is less cylindrical than most, fat with a subtle gray- blue dorsal network of color. Time for that beer. Shells and Sea Life, 16(7):193 1048 - Back into the lagoon, in another direction, heading into large coral heads surrounded by sandy avenues. Hovering under one head is a family of lionfish, tipped with white and cream- colored poisonous fronds. They, obviously, want no part of me, and edge further under the coral. Right below me, at the edge of the coral head, is a promising-looking sandy well with telltale shell fragments. Yield: a medium sized Conus varius and, even better, a handsome Conus terebra: uncommon in these parts — symmetrical, heavily grooved, dull under a thick periostracum but due to clean up to beautiful pastel browns, yellows, and whites. 1103 - Local fishtraps are another special hunting ground. These are large hexagonal affairs, woven from bamboo strips, with a triangular notch on one side and, usually, a few confused looking fish inside. A check of a trap usually turns up nothing but you have to play the odds, and today they’re in my favor — a small Cypraea clandestina. They like weedy, muddy environments and this one, wrapped in a smooth black mantle, is (was) crawling along underneath the bamboo. 1123 - Along comes an nealawa . a local outrigger fishing boat. Local fishermen often spend some of their time, at low tides, looking for shells (to clean up and sell to tourists) or octopus (for home consumption). They seem to have a special knack for turning up some of the bigger cones and, especially, the Bull Mouth Helmet which frequents these waters (Cypreacassis rufa). Today, their minds are on fish, and, after an exchange of greetings in Swahili, they head on out to the Zanzibar Channel. 1135 - The sun is beginning to take its toll, as are the small stinging jellyfish in the water and, Saturday, or not, there is work to be done back ashore. We agree on another fifteen minutes, which I spend in the shallow areas near the reef edge. The tide is coming in and some of the deeper areas are now harder to work. This area, although less attractive due to wave action and, I hate to say, some recent dynamiting, is still a rich shelling area. The day’s last circuit produces the following: a small characteristically dull but perfect Harpa amouretta, buried just under the sand; two different specie of drupe shells, rupa lobata and grossularia, hesLyily encrusted on back but with shining brown-black and golden apertures, respectively; a nice specimen of Terebra crenulata; fragments of what had been a perfect C. argus (and looked as though it still might be, until I pulled it from the sand), and a poorly-camouflaged Lambis chiraga. 1150 - Back in the boat and off to Dar. The wind is kicking up and we’ll have a shower or two before we get back, this being coastal Tanzania’s rainy season. No shelling, probably, next weekend, since the good spring lows always fall in the late morning on a rough two week cycle. But the weekend after that .... ♦ ♦ ♦ * * Editorial Staff Managing Editor Steven J. Long Assistant Editor Sally Bennett Contributing Editor Hans Bertsch Photographic Editor David K.Mulliner Contributing Editor Tom Rice Editorial Review Board R. Tucker Abbott David W. Behrens Hans Bertsch Kerry B. Clark Walter O. Cemohorsky Malcolm Edmunds Eugene V. Coan Terrence Gosliner Michael T. Ghiselin James R. Lance George L. Kennedy T.E. Thompson William G. Lyons SHELLS and SEA LIFE wjis formerly known as the OPISTHOBRANCH NEWSLETTER. The magaeine is open to articles and notes on any aspect of malacology, fossils or related marine life. Technical articles submitted for publication are subject to editorial board review. Articles should be submitted typed and double-spaced. Authors receive 10 reprints of their article. Additional reprints are available for purchase. For additional information send for free booklet "Suggestions for Preparing Manuscripts for SHELLS and SEA LIFE." We undertake no responsibility for unsolic- ited material sent for possible inclusion in the publication. No material submited will be returned unless accompanied by return postage and packing. Display advertising is $26 per column inch, minimum, with discounts for larger ads Si multiple insertions. Send for rate card. SHELLS and SEA LIFE ISSN 0747-6078 is published monthly for $24 per year by Steven J. Long : £ 1 -34 VERMETIDAE SECEylECBiS EQyEBliSELyy ■ Palmer' 1958 Type specimens of marine mollusca described by P. P. Carpenter fr'om the West Coast, page 173, gives 1856 as date of publication. CERITHI IDAE glttiyfJl EtlEiiiEEE = iitiium yancguyerense. In Barnard 1970 A distri but lonal check list of the marine mollusks of British Columbia, SYESIS vol. 3:80. llttiyC] EEDjySDEDSE - gittium yancguyerense. In Barnard 1970 SYESIS 3:60 QECitbiEEEiS EElECDQyM = G;- EElyML'§ Ber'nar'd 1970 SYESIS 3:80. GECitBiEEEis fraseri = Cerit h i ggsi s char2ot t ens 1 s. In Barnard GEEifeBiEESi s wiilEiti = GECitBiEBEiS EElyL’DE I''' Bernard 1970 SYESIS 3:30. ditiBlEEElE iL'BiEDECy!!! (Carpenter, 1864). See DuShane 1979 VELIGER ££(£> :1137 Qstergghila jaggnica Randall & Heath, 1912. Occurrence Northern Bering Sea. I took a number of this soecies froni the star- — fish Legtasteria gglEElS from the Southeastern Chukchi Sea and Nor't heast ern Ber'ing Sea, Alaska". Also see: Hober'q, Feder, & Jewett 1980 OPHELIA l9(l):73-77. "Some aspects of the Biology of the Parasitic Gastropod, Asteroghial jaggnica Raridall and Heath ( Prosobranch 1 a : Melanel 1 idae) . HIPPONIDIDAE Sabia ggniga (Schumacher, 1817). Cowan 1974 Sab^a ggcXEE (Schumacher') on the Pacific Coaast of North America. Probably introduced. lEiEBstrogis ganceilata Hinds, 1843. I do not have the first paper, but in Hind’s other 1843 paper, The Zoology of the voyage of H. M. S. Sulbher, on page 39 he does call this species IrLEBEtESEiar par'ent het 1 ca 1 rnar'ks. SyOEtyCEilE EyEyiiEfeEi Bn. EEEQCata, P,_ major, and P^ my i ilE.1-E.iEtE all in the subger-er'a Cranogsis probably should be elevated to the genus GEEDESEIe- See Cowan & McLean 1966 VELIGER 11 ( 2 ): 13 -. LAMELLAR! IDAE WEMEiiEEiS EBEOlBiEE Lamellaris stearnsii ar'e MarseninE. In Behrens 1980 VELIGER £2(4) Lamel Iri idae fo the North Eastern Pacific". EyDEtyEEiiE EyEEdE"! Dali, 1924 is a valid soecies ft'om Pr'ince Will iarn Sound. ACMAEIDAE GSiiiEEllE BiSi-tEliEi. Qn. EEltEi_ BEtEEEOEE PEEEEDEi. ESytum, and BiEBSEE EEEEEE ^11 should have Rathke, 1833 as the on)y author. Eschscholtz collected the soecirnens, but did not describe them. See McLean 1970 VELIGER 13(1); 112. Velutina undata (Brown, 1839) should be according to MacGinitie 1959 PUSNM 109(3412) :94, "Marine Mollusca of Point Barrow, Alaska", Velutina undata Browni nSmi t h, 1839. NATICIDAE Mostly based on Marincovich 1977 Bull. of American Paleontology Vol. 70(294), "Cenozoic Naticidae of the Northeastern Pacific. He has more changes than I note, but they are not in my area, nor have I collected them. Shells and Sea Life, 16(7):195 SisslicoBSis’ EycBiicea “ 05iauroEai« isiSD^ica Cr'^Et9!2*'tiS3 eiayS§ = iQC^Bt9I2aS.i£a2. 9i3Si§§ Broderio & Sowerby, 1029. Euagira Eufoira Eusgira Euagira igyiiii = E9iiDi99i liyisEic^i isyisii = Neverita INeyerita). nana gaiiida = PoiiQces lEuseira). Qajllidya B9ii£i39§ ~ Neyerita INeyerita). goli,tiana N§tica J.anthostotna Deshayes, 1641. Marincovich and othera giva 1839 as date of publication. COLUMBELLIDOE 0!5Et!iS§§ iDall, 1916).. Onigionallv oeacribed as a "variety” of Columbiana. §yccinum tgnebrgsum “ feyccinum cyaneum. In Macpherson 1971 The Marine Mollusca of Arctic Canada p. 89 NEPTUNIDAE ®*CiI3Siy5 PgtlCiC!9i (Middendorf f , 1848) This is the most common igCiOHiyS the Eastern Bering Sea. bigEtyngg PgbCiDSigDS “ i!gniD3iy§ fegticicsi- Besides my feeling about this, see j Tiba 1972 VENUS 30<4):154. NgEtyDgg t!9!295 (Gray, 1950). Most common Neptunid of the Bering Sea. Seei Macintosh. 1976. A Guide to the identification of some common Eastern Bering Sea Snails. Northwest Fisheries Center Processed Report, March, 1976. National Marine Fish- -eries Service, Nortwest Fisheries Center, Kodiak Facility, Kodiak, Alaska. PHOLADIDAE Xi:l9Ebaaa ISSabiDfltona » Xyloghaga EaiifoQica Bartsch, 1921. Xt caiifgrniea proceeds Xj. wastjiQutgQ on page 32 of Bartsch 1921 Proc. Biological Society of Washington. There are a great number of problems with Alaskan mollusks that have not yet been cleared up. Although publication of the following list of probable changes has n^t been made, I include them inorder that others might be tempted to work on them. ECSbiacrnaea agicina I think is an 0E!B*aa based on its radula and in that I have never seen larva with a protoconch shell in the body cavity as I have with ECEbScmaea syfearitica. USESta esecoideg » QciJEtEbcaDEbifi concentrica Q9E£yliQS casaniga The holotype, USNM 222,069 is beyond any doubt kEBS&g £gS9S based on my examination of the holotype. iibBiiDSalys Dg* ICiCSiyESDS Carpenter, 1864 ? §i<*Qg2B3iS fiiaakana « Bissstiia glSSBgQg* Paper on this change is in progress. Based on radula, opercalum, and external body conf i gurat ion. yilciDfiiia alaihgoalB probably = Biassslia iiaaisaDS USB&SSyca alaaBana Bartsch, 1910 might belong in family TORNIDfiE. It also might be the young of some other species. I examined the paratypes and pulled the radulas from those specimens with bodies. Four different species were represented amoung the 8 paratypes. I plan to examine the holotype again to see what this name means. The holotype, USNM 208,433, does not have a notched lip as Bartsch reported, just a chipped lip. QsnitbioEsis Icyusatys “ EscitbiQBSis sS-ejugagci SciCSa EBBiyla&a (Wlghels & ndams, 1842). Occurrence Boring Sea. I have taken this species living, from the Bering Sea along with Pgirga borgalig. The 2 species are different with no over lapping of characteristics. baigOglig Seems confusion between this and Bgigis as to correct name. Meian§l.la comoxensis « Me^aneiia 0 }icang B§2iEbi09g ESCffllEiliS i “ LiEcogayg eeIEei NgEtyDSS berfngi, = NgElyOgg Habitat form living on sand and where the currents are swift. Occurrence Inner Bristol Bay and Cook Inlet. Nogtynea borgaiis (Philippi, 1650). Occurrence: Bering Sea - Aleut ians. NSBiyOSa EEwwyOis ^ (^EBiyOEg borggHs Negtunea gycosmfa •= Agcfst rolegfs gygogmig (based on shell shape and radula). Negtynea magna = Qlinogegma magna N®EtyD®3 EbEEOiE* (Dall, 1891). Occurrence: Southeastern Alaska - Northern California. Common in the deep fiords in Alaska. WEBtynea gribifgf f ensis probably = N^ gtSiyotE bEBtunea stflesf = Ngetynea lyrata. Habitat iform from the southern part of its range. Pl^icifysus ayrantiys (Dall, 1907). Occurrence: Southeastern Bering Sea. PliEifysyS iatfcordatys = Eiicifusus ayrantfus Piicifusus stejnegeri (Dall, 1884). Occurrence: Central Bering Sea around the Pribilof Islands. We took a number of living specimens of this species from the "Miller Ferrman". I place it in this genus because of the size of its protoconch, sculpturing, has broad, f'ounded axial ribs on early whorls, spiral sculpturing only of incised lines, strongest on base, and similarity of the animal to that of P^ bCQEYECi* PliEifysys yerkruzgni = Eys i.yol ut ogsiys yerkruseni Sylcgsinys taghriym (Dall, 1891). Occurrence: Eastern Bering Sea. YsiytEBEiys behri.ngi = Beringiys behringi yBiytEBEiys E®ii2EbiQyS “ EiiEifysyS §tejneggri ysiytEESiyS Eaii2EbiQy§ stejnegeri » Plicifusys stejnegerj ysly&EEsiys fliesys- This needs to be in a new genus. Too many body and radula differences to remain in this genus. yEiyiBESiyS CSBioDiS (Dall, 1891). Occurrence: Eastern Bering Sea. Adnigtg EiCEyEDEiDQtS “ bEyBtSEtE CD2Eg§feE BElSEiE iaSYiSC Leach, 1878. Valid species. I have taken this and Si EBytbSyyi together and find no intergrades between the 2 species. I do not think it is a sexual difference either. Gbmgtg mgdesta =■ Ngadmete modesta. There is a great deal of habitat variation in this species. With few collections, long distances apart, Dall named many species without knowing the variability or habitat variation of a species. Admete una l,ash kensjs = Neadmete modesta Mangeija erjogjs Dall, 1919. Occurence: Southeastern Alaska to British Columbia. Shells and Sea Life, 16(7):197 Bartsch, 1907. MitCornorEda ataciiio*; (Hemphill in Tryon, 1884). Occurrence Southeastern Alaska - California □ onoEota, in the broadest sense, including the genera Notstorna^ □bosotoma, has major problems. My collection of Alaskan species is extensive, exceeds even that of the Smithsonian, and I am very confused as to how far the groups should be split. Some things are clear, though, and that is that Dali and Bartsch had a unique concept of speciation. There are approximately 26 undescribed species in the different collections and institutions. I will be at the Smithsonian this coming winter to work on this group. Anyway, the following comments are applicable at this time. DenoBota aleutiga = OenoEora EMCaEDd^iiS OenoEota althorEensig = QgnoEQta yiolacea OenoEota amiata = QenoEOta rosea OenoEota bechtii Mbller, 1842. Occurrences Arctic - Prince Will iam Sound. OeQOEota bicarinatg = QengEota yiolagea OenoEota crebr i.co3t at a (Carpenter, 1865). Occurrences Southern Bering Sea - California. Generally listed under Mangel ia. QeCOfiOta eriEEls = QgDQEota aiakensis OenoEota goyidii = Qenogota ryayistg o'" Qi- tyCCiSyia Oenogota laeyigatg = Oenogotg SimBieS QgD 2 Eota iotta • QgDOEota krausei QenoBota miona (Dali, 1919). Occurrences Aleutian Islands - Central California. OonoEota mitrata = QengEOta tyccisyia QghOEgta moerchi QgD9E2£§ godulosa = QenoEota vigigcea QengEOta guadra (Dali, 1919). Occurrences Aleutians to Puget Sound. Oenggota rgsea (Lovfen, 1846) I think is the same as Oenggota rgsea (G.O. Sars, 1876), at least the species from the North Pacific, Bering Sea, and Beaufort Sea is Sars’ species. OoQgEota sarsii (Verrill, 1880) =» Oenggota rosea (G.O. Sars, 1878) OgDogota scalaris = Ogngggta turr^cyia Oengggta tgoyioggtata (G.O. Sars, 1678) or (M. Sars, 1666). Occurrence: North Atlantic - Arctic - Prince William Sound. QgDOBota yiriduj,a (0. Fabricius, 1780). Confused with Qj. fidicyia and other some species. Occurrences Bering Sea - Central Cal i f orni a. Ofidiodermeiia cancgiiata = QEdiS^gCSlgiia CdiOgS QEdiodermel l,a incisa (Carpenter, 1864). Occurrences British Columbia - California. laranis strgngi Arnold, 1903. Occurrence: Southeastern Alaska — Southern California. PYRAMIDELLIDAE. Another family that needs major work, especially the Qdgstgmi.a . Qdoatgmia liyalea). amchitkana Dali ft Bartsch, 1909. Occurrence: Attu, Aleutian Islands - Forrester Island, Southeastern Alaska, Qdostgrgia iBtSaycai gveliana Carpenter, 1665. Occurrence: Puget Sound - Baja California. Q^2SS.22!ig f gOSiS Dali ft Bartsch, 1910. Occurence: Cook Inlet, Alaska - Southeastern Alaska. Q^ 2 SS.gmia iMgDg§tt32l ggstanea (Mttller, 1842). Occurrence: Arctic Alaska - North Atlantic. Qd2®t2Mi* l§Yal.ea2. giossini Dali ft Bartsch, 1909. Occurrence: Kachemak Bay, Cook Inlet, Alaska - Southeastern Alaska. Q^2St2[Di* livaiea). deligigsa Dali ft Bartsch, 1907. Occurrence: British Columbia - Central California. Qdostgmia liyaieai hagemeisteri Dali ft Bartsch, 1909. Occurrence: Hagerneister Island, Eastern Boring Sea. Q32stgrgia lEyaleal tSSEiSkengia Dali ft Bartsch, 1909. Occurrence: Kodiak Island, North Gulf Coast, Alaska. Qd2ll2!2i§ IBffigycgi Bgsg Dali ft Bartsch, 1909. Occurrence; Kodiak - Prince William sound - Southeastern Alaska. Qdgstgmia iEyaiea). sitkaensis Clessin, 1900. Occurrence: Sitka, SE Alaska. Qd25t2!I}i§ liy.Siggi stgEtlghsae Dali ft Bartsch, 1909. Occurrence: Cook Inlet, Alaska - British Columbia. Qd 2 Stgmia iBmayral tgigg Dali ft Bartsch, 1909. Occurrence: Kachemak Bay, Cook Inlet, Alaska - PWS - Puget Sound. SheUs and Sea Life, 16(7):198 Qd2Si2£2ia liyalggl t i llamggkensis Dali ft Occurrence: Oregon. Qdgstgrnia liyaleal yaldezi Dali ft Bartsch, 1907. Occurrence; Puget Sound - San Diego, California. Qgs5.C9BtgC2D Eioereum = QastrgEteron Bg2ifi£yi0 BigEbgDg Mioytg (Brown, 1827). Occurrence; Alaska. Retusa semen Reeve, 1856. Occurrence; Arctic Alaska - Prince Will iam Sound. Rstysga umbiligata (Montagu, 1803). Occurrence: Arctic Alaska - Prince William Sound. f^ideria al bogaEi 1 losa Dali, 1871. Occurrence: Southeastern Alaska. StiliagC dendritica (Alder ft Hancock, 1834). Occurrence: California - British Columbia. igCibgilg denticulatus (MacFarland, 1966). Occurrence: South- -eastern Alaska - California Qoebidgcis bystcising “ QDgbiboris myciggtg Anisgdgris Igntigingsa Mi lien, 1982. Occurrence; Cook Inlet, Alaska - British Columbia. CgtCiODg DgOg (Alder ft Hancock, 1842). Occurrence: Bering Sea - North Atlantic. QytbaOg 22E!2iDQg ICiD£bg®ig E2D£iDt!g DgfgDig 22!DEg2i§ (Carpenter, 1864). Occurrence; British Columbia - Baja California. Valyata mergella = Valyata sincera Stagincgla arctiga = stagniggla yahiii. Stagnicgla yahlii (Beck in Mttller, 1842). Occurrence; Freshwater. 0Eig>Dall 1897). Range Dixon ^ Entrance, British Columbia / Southeastern Alaska 316). Qccurrerice: Eastern Bering Sea - Nyeyiana liaccellal hindsii (Hanley, I860). Occurrence: Nazan Bay, Southeastern Hlaska - Panama, Portlandia fraterna (Verrill & Bush, 1898), Occurrence: Bering Sea - North Canadian Basin. Voidia IQnesterium). ensifera Dali, 1897. Occurrence: Arctic Alaska - Central California. Yoldia IMggygldial montgreyensis Dali, 1893. Occurrence; Cook Inlet, Alaska - California. YQidia IMegyoldia) secunda Dali, 1913. Occurrence: Prince William Sound - Britisn Columbia. — .i}^ 2 ii.i®l.ia). EgEinei^a (Dali, 1916). Occurrence: Aleutian Islands - California. BCEbarH JobDSSni . Occurrence; Southeastern Alaska - Cal i fornia. EaDEMys Ebcysis Dall, 1909. Occurrence: Beaufort Sea - Prince William Sound. gamge^g adamsi (MacGinitie, 1959). Occurrence: Arctic Alaska - Chukchi Sea. Pgrgmya beringi.ana (Dall, 1 Northern California Pgrgmya mal.esginae (Dall, 1916) Alaska - British Columbia. Pgrgmya tenuiggngha Dall, Alaska - California. SsiiQOCdia glaskana (Dall, - Ca 1 i fornia. ESCbiSCSya Eycbs (Jeffreys, Columbia. Eysg^dgrj^a fiBEbema Dall, Alaska - California. EysBibgcis EbiigDgis Daii Alaska - Chile Eysgidaria murrayi (Smith, Eal.ii.stgEbit.ED EECiEEDiS Islands. Occurrence: Northern Gulf of a. 1913, Occurrence: Northern Gulf of 895). Occurrence: Southeastern Alaska 1882). Occurrence: Arctic - British 1916. Occurrence: Northern Gulf of Occurrenc Northern Gulf 1885), Occurrence; Gulf of Alaska. (Dall, 1908). Occurrence: Aleutj ISEbDEEbitED giiybi ” Eurjangyiiiia aiiyni (Ferreira, 1977) IsEbDEEbitED iiyibyg “ EbggtEEigycg gnaistg lEEbDEEbitSD tCifidus = Irigggiax trifidus ilEDEsernus abyssiggla A. G. Smith & Cowan, 1966. Occuri Northern Gulf of Alaska - Northern California. UgBibEEbitEDg aigytiEg = SSEDQiECgdsia aieutiga UgBibEEbitEDg fgCDglbi Eemisse, 1984. Occurrence; Puget Sound. E®Bib2EbiiSDg flgEtEDg = igsiiigghitgn figgtens LgEidoEbitEDg gbgCBii “ StEDEgglcyg gibyg LSEibEEbitED tbEE'agi (Pilsbry, 1898). Occurrence: Puget Sound. biEbiQbitED 9 C§Dbisgina Birenko, 1975. Ocurrence: Aleutian Islands - Western Bering Sea. iEbi22Bis>< DjyltiEElEC “ SEbi39Big>s bcgDbtii lEDigelia saggharina = Jyyeraghitgn saggharina TgniEElig Eitkensis = Legidgghitgna dentiens EbggtSEigyCg aglStOg- Author might be Carpenter MS in Dall, 1897? Msealis wossenssenskii ( M i ddendor f f , 1847). Appears to be a valid species. Occurrence: Kacnernak Bay, Alaska — British Columbia Rae Baxter, Box 96, Bethel, AK 99559 Ki" 275.— Chiliiia Pnel- °ha , (l'0i bii:ny. Du Rio Nesfo (d Oibigny). The Water Window Here's a new easy-to-use urxJerwater viewer mat makes QfxJing shells, rocks ar>3 collectiDles fun and profitacie for waders of all ages Discovering valuables is as simple as picking them out of a fishtx>wl with the Water Win- dow's 20* diameter, scratch-resistant lens Sturdy handles allow a flick of the wnsi to put your window to the trea- sures of the ocean floor exactly where you want it Oder DAO or rrxDre arx3 put dollars Pack in your pocket NEW W««r Window Acce*sort«l Nylon fTvsh Shell Bag Si 50. 2-foot ngd acryK Handle S3 50. Water WirxJow acrylic ftjiish S3 75 Please en-_ close S39 95 plus S2 00 for shipping and handling per window. S70 for 2 Each additional - S35 Allow 2 -a weeks for delivery Shells and Sea Life, 16(7):199 Living Clocksprings, part 2. Chris inert, 2 Tern Place, Semaphore Park, S. Australia 5019. Although there was a great deal of interest in Natural History at the turn of the century, and several scientists had observed that certain gastropods use their shells as tensile springs to pry open cockles (i.e. Francois 1890, Colton 1908, Warren 1916 and Cope- land 1918), the idea that molluscan shells coil in optimally strong elastic-spring shapes had not really been taken seriously. Theodor Andrea Cook (1914) drew an analogy between the coils of a turbinate seashell spire and those of "a conical watchspring . . . formed ... by lifting up the centre of the coil and fastening its longer outside whorl to the table” , yet he still felt obliged to apologise for this analogy commenting that "mathematics is an ab- stract science and I have only entered upon this enquiry at all because it suggests so many questions to which the specialist has as yet provided no reply". We have seen, however, that the watchsprings first mentioned by Cook, in 1914, pe not transcendent metaphysical ANALOGIES . The whelk studies of Colton (1908) clearly show the watchsprings to be pertinent scientific EXPLANATIONS of one of the molluscan shell's primary functions; the optimal dissipation of stresses un- avoidably inflicted on it during the normal course of life. The whelks and murexes mentioned in the first part of this article, and the helmet shell shown in Figure 3 (opposite) , demonstrate that at least some shells do not merely resemble tensile springs, they actually function like them. The gastropod's soft body, coiled about the shell columeUa, is able to rotate the shell about its axis (like a hand twirling the winding spindle of a spiral spring) causing the (often strengthened) shell aperture to force bivalves apart , or to bulldoze sea-urchin spines out of the way, thus facilitating feeding. This is perhaps a little more obvious in the case of the South Aus- tralian helmet, Cassis fimbriata, because it is larger than the previously discussed whelks and murexes. It even has a thicken- ed apertural vanx so that it can bulldoze the sea-urchin spines without fracturing. As early as 1974, I observed similar varices at earlier stages of helmet-shell ontogeny and concluded that these molluscs, like their triformis murex counterparts, increase their shells by a whole 240 degree segment during the course of infrequent but rapid periods of growth. Only when the whole segment is completed can the gastropod then feed. More recently it has been commented by Linsley (1977) that "the growth of shells from the families Cassidae, Cymatiidae , Bursidae and Mur- icidae ...is not a continuous event, but occurs in abrupt episod- es. During these growth spurts the animal may he very vulner- able . . . The growth of Cassis apparently represents the most rapid deposition of aragonite to be found in the phylum mollusca". My aquarium and scuba studies, in the mid 1970's, revealed the feeding habits of the South Australian helmet and the role play- ed by its apertural varix during feeding. I reported in Of Sea & Shore (1980) that the thickened apertural varices protected the shell body-whorl from the destructive breakages that Nielsen observed in his European whelks. The helmet is an excellent example of a living "clockspring" in action. The only weakness being that a particularly energetic urchin can sometimes maneuv- er a spine or two under the helmet's shell-aperture, in an attempt to poke the gastropod's soft body hear its aU-important siphonal Figure 3. The South Australian helmet. Cassis fimbriata, using its thickened apertural varix to bulldoze sea-urchin spines out of the way during feeding (after Chris Illert 1973, 1976, 1980). 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