230 : REPORT—1857. 
The following is a summary of the species :— 
Acephala lamellibranchiata ..... dois. adie sie Re 
Pallicbranchiata 0's o.6-0-eeinryanovagess sommes 
Gasteropoda prosobranchiata ........ sore Oy 
opisthobranehiatain gles py ice, oe FE 
ia Aloe cas srekale leew tie 193 
List of SHEetus from the Tursot Bank. 
Those marked A, determined by J. Alder, Esq. 
Species. Observations. 
— 
Pholas striata ............,|. very rare | dead |2 single valves only found. It is not ad- 
mitted as a British shell by Forbes and 
Hanley, and it is no doubt an intro- 
duced species in shipwrecked Maho- 
gany. 
Saxicava arctica.........0+ scarce dead. 
TUQOSA ...e0eceeees | frequent dead. 
Mya truncata.........+ Bese scarce dead |Fragments mostly. 
—— AFENATIAs ss c00c0060800% scarce dead |Fragments only. 
Corbula nucleus........ pay scarce dead. 
Spheenia Binghami, A.... rare living. 
Pandora obtusa....... aa sue rare dead, 
Lyonsia Norvegica......... rare dead. 
.Thracia phaseolina......:.. scarce dead. 
—— pubescens ............ scarce dead. 
Cochlodesma pretenue,.. rare dead. 
Solecurtus coarctatus ... rare dead. 
Psammobia Ferroensis ... rare dead. 
—tellinella ....... shoes scarce dead |Valves united. 
Tellina crassa............... rare dead, 
— donacina ....,....... rare dead. 
incarnata ............ rare dead. 
REMUS) ecareseencrnser scarce dead. 
—fabula ....... pet aeaas rare dead. 
—— solidula....-..0....00 rare dead. 
Syndosmya alba............ scarce dead. 
—— intermedia ......... scarce dead. 
—— prismatica............ scarce dead. 
Mactra elliptica........ +--.| Common «.. {A few living, dead shells common. 
Lutraria elliptica ......... rare dead |Fragments only. 
Tapes pullastra ..........4. scarce. eG 
—— VIFginea......see0eeees common dead |Sometimes with valves united. 
BULCRS <ackesaze Seessees rare. a 
Venus casina .............6- common dead |Sometimes with valves united. 
—Striatula ............| frequent dead |Sometimes with valves united. 
—— fasciata ..........0006 scarce living |Single valves not uncommon. 
=erere (VALB dvs seuiscsadess ose frequent dead |Occasionally living, single valyes very 
frequent. 
Artemis exoleta ..........:. scarce dead. 
—— lincta.....eceecsceceees scarce dead. 
Lucinopsis undata...... is! scarce dead. 
Cyprina Islandica .........| common dead |From the smallest size up to full-grown, 
valves often united. 
Circe minima............... scarce dead. 
Astarte sulcata ............ frequent Living occasionally, single valves common, 
var. Scotica ...... +-| frequent dead Single valves of small size. 
