310 MH. A. ADAMS ON NEW JAPAN SHELLS. [Mar. 14, 



j)res8a ; anfr. 11, conuexiusculis ; apertura subovali, \ totius 

 lonyitudinis ; cohunella rotu7idata, callo tenui induta ; lahro 

 acitto, sinuato, extus valde varicoso, intus Icevigato ; canali 

 lato, hrevi. 



Long. 2-1, diam. 9 mill. 



Hab. Gotto Islands, Japan. 



The largest and most beautiful species of the genus. 



Genus Iol.ea, A. Ad. 



Testa tenuis, turbinato-turrita, umbilicata, seu rimata ; anfracti- 

 bus sculjitis, convexis, transversim liratis ; apertura ovata ; 

 plica parietali obsoleta aut celata. 



I established this httle group under the name of lole in the * An- 

 nals ' for 1860, founding my diagnosis on a single specimen. Since 

 then, however, I have succeeded in obtaining both /. scitula and 

 another species, /. amabilis, in greater abundance ; and I find that 

 on breaking some examples the parietal plica exists, but is entirely 

 concealed. In I. amabilis it is conspicuous externally. The descrip- 

 tion and natural position of the genus, however, I still consider cor- 

 rect. I have altered the termination of the word lole, as there is a 

 genus of birds under that name. The group differs from Oscilla in 

 being thin and turbinate, with the axis more or less perforated, and 

 with the parietal fold either obsolete or entirely concealed. 



1. Iol^a scitula, a. Ad. Annals, 1860. 



Hab. Mino-Sima ; Seto-Uchi ; Akasi ; Mososeki ; Gotto. 



2. loL^A SCULPTILIS, A. Ad. 



Menestho sculptilis, A. Ad. Annals, 1861. 



Hab. Mino-Sima ; Yobuko. 



In the young shells the axis is rimately umbilicated. 



3. lOLiEA AMABILIS, A. Ad. 



I. testa turbinato-turrita, rimata, alba, tenui, subdiaphana ; an- 

 fractibus 6, convexis, transversim liratis, /iris acutis, angustis, 

 elevatis, distantibus, interstitiis longitudinaliter valde striatis, 

 suturis canaliculatis ; apertura aeuminato-ovata, antice pro- 

 ducta et effusa ; labio libera, arcuato ; plica parietali jjostica, 

 parva, iiiconspicua . 



Long. 3, diam. 1^ mill. 



Hab. 0-Sima ; Tanabe ; Gotto, 48 fathoms. 



A thin, semipellucid, exquisitely sculptured species, with chan- 

 nelled sutures. 



Genus Oscilla, A. Ad. 



Testa solida, ovata sen pyramidato-turrita, imperforata ; anfrac- 

 tibus transversim valde liratis ; apertura ovata aut subqua- 

 drata ; plica parietali valida, transversa, mediana. 



