274 MR. H. ADAMS ON NEW MARINE SHELLS. __[Apr. 22, 
This beautiful example of the genus Nacella differs from the 
typical species in the apex being nearly central, and in the form 
being depressedly conical. I therefore propose to separate it as a 
subgenus under the name of Cellana. 
Navica MARworata, H. Ad. (Plate XIX. fig. 8.) 
N. desta subglobosa, solida, subtilissime ae oblique striatula, albida, 
pallide fulvo marmorata, juxta suturam strigis fulvis angulatis, 
et in medio anfractus ultimi maculis sagittutis seriatim fasciata ; 
spira parum elevata, sutura distincta ; anfr. 5, ventricosis ; aper- 
tura subsemilunari; columella arcuata, callosa, callo antice cas- 
taneo ; umbilico parvo, funiculato ; labro simplici, recto. 
Long. 16, lat. 12 mill. 
Hab. Canary Islands (Coll. M‘ Andrew). 
Scata peticatua, H. Ad. (Plate XIX. fig. 9.) 
S. testa viv perforata, elongato-turrita, tenui, albida, lamellis ele- 
vatis tenuibus numerosis longitudinalibus, ad suturam productis, 
clathrata, inter lamellas spiraliter striata; spira anfr. 11, con- 
vexis, contiguis, apicalibus levibus ; apertura subcirculari ; labro 
vie incrassato. 
Long. 64, lat. 24 mill. 
Hab. Lancerote (Coll. M‘ Andrew). 
SyRNoLA minuTa, H. Ad. (Plate XIX. fig. 10.) 
S. testa subulata, in medio tumida, solidula, polita, albida; anfr. 
ad 10, planatis, fascia angusta pallide fulvo ad suturas cincta ; 
sutura impressa ; apertura ovata; plica parietali conspicua, trans- 
versa; labro intus simplici. 
Long. 4, lat. $ mill. 
Hab. Orotava (Coll. M‘Andrew). 
TurBONILLA speciosa, H. Ad. (Plate XIX. fig. 11.) 
T. testa subulato-turrita, solida, albida vel pallide fulva; anfr. 16, 
planiusculis, costis obliquis validis undulatis rotundatis instructis, 
interstitiis equantibus levibus ; costis in anfractu ultimo ad peri- 
pheriam desinentibus ; apertura ovato-quadrata ; labio recto. 
Long. 18-24, lat. 43-53 mill. 
Hab. Vigo (Coll. M‘Andrew). 
CANCELLARIA PUSILLA, H. Ad. (Plate XIX. fig. 12.) 
C. testa imperforata, ovato-turrita, albida, longitudinaliter obtuse 
nodoso-costata et te remotis cincta; spira elata, sutura leviter 
impressa; anfr. 5, convexiusculis, ultimo + longitudinis teste ; 
apertura oblonga, antice vie canaliculata ; ‘labio antice sinuato, 
plicis duabis validis instructo ; labro simplici, intus valde lirato. 
Long. 6, lat. 24 mill. 
Hah. Canary Islands (Coll. M‘ Andrew). 
