95 



on the posterior four lateral teeth, whilst the other species has on 

 each side one tooth less. {Cardine utrinąue subbicostato, Lam.) 



Vknerupis tenuisthiata. Jonas. Ven. testd ovatd, iransversd,cequi- 

 valvi, in(Equilaterali, albd, striis radiantibus tenuibus undulatis, 

 suleis incrementi distantibus decussatis, concinne sculptd ; lateribus 

 rotundatis, marginibus dorsali et ventrali parallelis leviterąue ar- 

 cuatis ; lanuld nulld, ligameiito longo, prominente, umbonibus parvis 

 acutis ; cardine utriusque valva dentibus tribus compressis ; im- 

 pressionibus musculorum magnis, rotundis, sinu palliari lato, pro- 

 fundo, semilunari. 



Long. 15, altit. 9, crassit. 6 lin. 



Hab. Apud Singaporen. 



Exstat in museo hon. Gruner. 



The umbones are situated so near the anterior end that the su- 

 perior margin of the shell almost forms the area. 



Fasciolaria clava, Jonas. Fase. testd subfusiformi-clavatd, ven- 

 tricosissimd , crassd, ponderosd, nodosd, albd, rubro variegatd, filis 

 fuscis transversim impresso-striatd ; anfractibus octo medio angų- 

 latis, tubercuHs magnis compressis in angulo coronatis ; ultimo 

 superne angulato et coronato, infra angulum seriebus tribus nodo- 

 rum obtusorum armato ; suturd undulatd, crispd ; caudd spira: 

 subeBįuali, obligue funiculatd, rectd, inferne subrecurvd; aperturd 

 oblongo-ovatd, intus hepaticd, aurantio tenuissime striatd, labro 

 crasso, dentato ; dentibus striis externis respondenlibus ; columelld 

 cylindraced, hepaticd, basi triplicatd, 



Long. 5į, lat. 3į poli. 



Hab. In Oc. India. 



Amphibola obvoluta. Jonas. Amph. testd solidd, nitidd, superni 

 pland, inferne convexd, late umbilicatd ; anfractibus gvatuor obvo- 

 lutis, suturd pro/undd divisis, transverse striatis, albis : ultimo zonis 

 duabus latis, glaucis obsolete balteato, obtuse superne angulato; 

 aperturd ovatd, labro postice subexciso, columelld rectd, callosis- 

 simd, callo umbilicum latum pro parte tegente ; regione umbilicali 

 et callo fuscis. 

 Altit. ab apice ad aperturse basin, 8 ; ad ultimi anfractūs basin, 6 ; 

 diameter major 10^, minor 8 ; aperturae long. &\, latit. 3^ lin. 

 Patria, Australia meridionalis. 

 Exstat in museo hon. Gruner. 



Schumacher was the first who in his ' Essai d'un nouveau Systėme 

 des habitations des vers testaces, a Copenhague 1817,' elevated the 

 Nerita nux avellana, Chemn., to a peculiar genus, which he named 

 Amphibola. Lamarek ranged it among the AmpuUarias, till Quoy and 

 Gaimard separated it, after careful examination of the animal, from 

 this genus, and instituted it the type of the genus Ampullacera. 

 It appears from this that Amphibola and Ampullacera are identical, 

 and that the first denomination has the priority. 



Our species is very likę to the Amphibola avellana, but may how- 

 ever be distinguished from it by the following difFerences : — 1, it is 



