ON NEW SPECIES OF &lt;italic&gt;HEMIPLECTA&lt;/italic&gt; AND &lt;italic&gt;XESTA&lt;/italic&gt; FROM THE XULLA (= &lt;italic&gt;SULLA&lt;/italic&gt; OR &lt;italic&gt;SULA&lt;/italic&gt;) ISLANDS, WITH NOTES ON OTHER SPECIES FROM THE SAME LOCALITY
Journal of molluscan studies