Journal of conchology . characters, I havelittle doubt in referring the shell that Mr. Woodward calls P. pusilltitnto the nitidum of Jenyns. Of the type specimen oi ]Q\-\yViss Pisidium pusilluin Mr. Oldhamwrites :— Shell unopened. The rounded outline and silky texturedue to very fine striation indicate P. personatum. The specimenmatches exactly a long series on a tablet marked Pisidium pusillum 238 JOURNAL OF CONCHOLOGY, VOL. I5, NO. 8, JANUARY, I918. Jenyns. One of these is open and is beyond doubt P. callus is well marked in both valves. Seven unopened shells onanother tablet
Journal of conchology . characters, I havelittle doubt in referring the shell that Mr. Woodward calls P. pusilltitnto the nitidum of Jenyns. Of the type specimen oi ]Q\-\yViss Pisidium pusilluin Mr. Oldhamwrites :— Shell unopened. The rounded outline and silky texturedue to very fine striation indicate P. personatum. The specimenmatches exactly a long series on a tablet marked Pisidium pusillum 238 JOURNAL OF CONCHOLOGY, VOL. I5, NO. 8, JANUARY, I918. Jenyns. One of these is open and is beyond doubt P. callus is well marked in both valves. Seven unopened shells onanother tablet marked Pisidium pusilliim Jenyns comprise, I think,P. personahim and P. hibernicum. A tablet marked ?Pisidhim pusillumvar. has had all the shells removed. Specimens on a further tabletmarked ? Pisidmmpudlhim (with a ? in pencil) are P. on four tablets marked Pisidinm cinereiim Alder are all Open valves in each series show the hinge characters well. Right valve. J> -^ Left
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Keywords: ., bookauthorconcholo, bookcentury1800, bookdecade1870, bookyear1879
