58 
presso; apertura diagonali, lunato-ovali, intus submargaritacea ; 
perist. tenui, recto, margine columellari leviter arcuato, sursum 
valde dilatato, fornicato-patente. 
Long. 22, diam. 16 mill. 
Hab. Natal. 
2. Butimus picrus, Pfr. B. testa anguste umbilicata, ovato- 
conica, tenuiuscula, sublevigata, pallide lutea, fasciis spadiceis, 
interruptis strigisque sparsis elegantissime subtessellata; spira 
conica, acutiuscula; sutura levissime crenulata ; anfract. 7, con- 
vexiusculis, ultimo 2 longitudinis equante, basi rotundato, infra 
medium et circa umbilicum fasciis non interruptis signato ; aper- 
tura parum obliqua, elliptico-ovali; perist. simplice, recto, mar- 
gine dextro regulariter arcuato, columellari leviter arcuato, sur- 
sum dilatato, fornicate-patente. 
Long. 23, diam. 11 mill. 
Hab. Peru. 
3. Buxtimus rapiosus, Pfr. B. testa semi-obtecte perforata, ob- 
longo-conica, tenuiuscula, striatula, lineis impressis, spiralibus, sub- 
confertis decussatula, albida, strigis epidermidis virenti-fulve ra- 
diata ; spira conica, acuta; anfract. 53, superis planis, sequen- 
tibus convexis, ultimo spira paulo breviore, infra medium obsolete 
angulato ; apertura parum obliqua, oblonga ; perist. simplice, mar- 
gine dextro recto, superne arcuato, columellari subtorto, superne 
dilatato, fornicato-reflexo. 
Long. 21, diam. 10 mill. 
Hab. New Hebrides. 
4. Butimus Gatapacanus, Pfr. B. testa compresse umbilicata, 
ovato-turrita, tenui, striatula, sericea, pellucida, corneo-cerea ; 
spira convexo-turrita, acutiuscula ; sutura submarginata ; anfract. 
8, convewxis, ultimo + longitudinis subequante, juxta umbilicum 
compresso ; apertura subverticali, oblongo-ovali ; perist. simplice, 
margine dextro vix expansiusculo, superne arcuato, cum columel- 
lari introrsum subtorto, patente angulum formante. 
Long. 153, diam. 6 mill. 
Hab. Galapagos Islands. 
5. MonoGrapus or AcT#ON AND SOLIDULA, TWO GENERA OF 
Gasterorpopovus Mo.uuusca with DESCRIPTIONS OF SEVE- 
RAL New SPECIES FROM THE CUMINGIAN COLLECTION. 
By Artuur Apams, F.L.S., Surgeon R.N. 
Genus Acrzon, Montfort. 
Head in the form of a quadrate disk, bilobed in front, with broad 
posterior tentacular lobes ; eyes sessile, on the middle of the head ; 
mantle included ; branchial plume single. 
Operculum horny, sub-spiral. 
