from the Vancouver District. 427 
et striis subobsoletis cincta, suturis valde impressis ; basi rotun- 
data, obtuse angulata, striis seepe evanidis spiralibus ornata, testa 
adulta circa umbilicum magnum, infundibuliformem, vix angu- 
latum, seepe tumidiore, medio obtuse impressa; apertura sub- 
quadrata, parum declivi; columella subarcuata. Long. *16, long. 
spir. °07, lat. °16, div. 70°. 
Hab. Neeah Bay (Swan); Lower California, on Haliotis 
(Rowell). 
27. Gibbula lacunata. 
G. testa parva, fusco-purpurea, solidiore; marginibus spire valde 
excurvatis ; anfractibus nucleosis normalibus, postea iv. subpla- 
natis, suturis distinctis, apice mamillato; subleevi, circa basin 
vix angulatam striolata, striolis spiralibus distantibus; apertura 
suborbiculari, parum declivi; labio juxta umbilicum constrictum, 
quasi lacunatum, lobato; columella callositate parva umbilicum 
constringente. Long. ‘11, long. spir. :05, lat. 11, div. 80°. 
Hab, Neeah Bay (Swan). 
28. Gubbula funiculata. 
G. testa parva, elevata, compacta, fusca; marginibus spirze excur- 
_vati. : anfr. vi., haud tumidis, suturis parum impressis ; lirulis 
crebris rotundatis undique cincta, quarum vy. in spira monstrantur ; 
interstitiis parvis ; basi rotundata, haud angulata; umbilico parvo, 
haud carinato; apertura suborbiculari, parum declivi; columella 
vix arcuata. Long. °24, long. spir. ‘11, lat. °2, div. 70°. 
Hab. Neeah Bay (Swan), specimen unicum. 
29. Hipponyx craniordes. 
H. testa valde planata, majore, albida; vertice nucleoso?...; testa 
adulta apice interdum subcentrali, seepius plus minusve postico ; 
laminis incrementi confertis, undique rapide augentibus ; striis 
radiantibus fortioribus, confertissimis, lammarum margines szepe 
crenulantibus; margine acuto; cicatr. musc. angusta, margini 
contigua, regione capitis minore, seepe dextrorsum torsa; epi- 
dermide?... Long. °85, lat. °75, alt. °3. 
Hab. Neeah Bay (Swan). 
30. Bivonia compacta. 
B. testa satis magna, seepe solitaria, purpureo-fusca, spiraliter ple- 
rumque satis regulariter contorta, obsoletim cancellata seu sculp- 
tura fere evanida; testis tenacissime adhezerente. Long. (plerum- 
que) *7, lat. *3, diam. apert. °1. 
Hab. Barclay Sound; abundant on Pachypoma gibberosum 
(Swan). 
Belongs to Bivonia, Gray (not Moérch). Has the aspect of 
Petaloconchus macrophragma on a large scale, but is entirely 
destitute of internal laminz. One specimen had a faint colu- 
