410 
a. erassiuscula, opaca, alba (coll. Cuming.). 
fb. pallidissime rosea. 
y- fuscescens, rima utringue violacea, apice alba (coll. Dunker.). 
Jun. Siliquaria lactea, Lam. Hist. v. p.338.no.5; Dh. v. p. 585 ; 
Blainv. Dict. xlix. p. 213 ; Chenu, Ill. pl. 2.f. 1. 
Hab. Mer des Indes, Voy. de Péron (Lam.) ; les mers australes, 
Pér. et Less. (Blainv.) ; Kangaroo Islands (coll. Cuming, a nume- 
rous group, quite filling a sponge). War. y. Adelaide. 
13. Tenacopus (PyxrpomA) TauHiTENs1s, Morch. 
T. crasiuscula albescens, ferrugineo-tincta, longitudinaliter ex- 
presse lirulata, striis incrementijucta rimam refleais regularibus 
expressis unde interstitis lirarum cancellatis, aperturam versus 
juata rimam obsoletissime fissurata ; rima coarctata, margine 
dextro incrassato. 
Long. rime apertee 45 mm., diam. anfr. ult. 5 mm. 
Tahiti, coll. Cuming., specimen fractum, long. 6 cm. 
Differt a precedente T. multo majore, liris fortioribus, interstitiis 
cancellatis, rima coarctata. 
14. Tenacopus (Pyx1PpoMA) ANGUILL&, Morch. 
T. gracillima, tenuis, candida, hic illic pallide carnea tincta, lon- 
gitudinaliter subtilissime lirulata, unde obsoletissime multiangu- 
lata ; rima regularis margine sinistro acuto suberecto, in anfr. 
primis clausa, lamina interna; striis incrementi validis, juata 
rimam reflexis. 
Long. 43 mm., diam. 2 mm. 
Differt a S. actea, T. graciliore crassiore opaca, rima angustiore. 
Hab. Oc. Atlant. ad ins. Anguillam Antillarum (Dr. Hornbeck). 
15. Tenacopvs (Pyx1pomMa) CyLINDRELLA, Morch. 
T.. elongato-cylindrica, trochlearis ; anfr. leves, teretes, medio ob- 
tuse angulati, ferruginei et pallidiores, transversim dense fis- 
surati, striis incrementi flecuosis inferne valde reductis ; rima 
angusta in anfr. primis lamina interna clausa; apertura ovalis 
inferne oblique labiata. 
Long. 74.cm., axis 18 mm., diam. testee 7 mm., alt. ap. 4 mm. 
Hab. Caput Bone Spei? 
Var. ? Vermiculus fissura quadam secundum volutas insig- 
nitus, Lister, Hist. Conch. sect. 3, pl. 548. f. 2=Tudbulus testa- 
ceus solitarius, §c., Mart. Conch. Cab. i. f. 13 A. 
Cylindrella seminuda, Adams, gives in miniature an idea of this 
shell. From some fragments of a Mytilus (Aulacomya), probably 
erenatus, Lam., being among the whorls, I suppose this species 
is from the Cape of Good Hope. The figure of Martini shows 
the colour, but the form is too broad. 
eS 
