1862.] M.0. A. L. MORCH’S REVIEW OF THE VERMETID. 63 
This variety differs chiefly from the preceding in the colours being 
stronger, the exterior side being of a deep chestnut-brown colour, and 
the upper side of a bluish white, like the preceding forms, but much 
more developed. A smaller specimen, attached to the same shell, 
with agglutinated pebbles, differs chiefly from the type in being 
thicker in the shell. 
? Var. . (ALETEs). 
T. solida, spiraliter torta, lateraliter affiva; anfr. contigui, pla- 
niusculi, incumbentes, obliqui, suturis dilatatis ; anfr. ultimus 
longus, solutus, fere semiteres, aperturam versus reflexus, liris 
longitudinalibus confertis, sepe connatis et leviusculis, leviter 
undulatis; ruge incrementi parve, approximate, suturam versus 
incrassate, leviter sigmoidee et sepe furcate ; interstitia lira- 
rum reticulato-scrobiculata, fasciis longitudinalibus angustis 
approximatis 4-5 aurantiacis ; sutura alba; anfr. ultimus 
sordide livescens ; columella candida, nitida, intus aperturam 
versus fuscescens. 
Diam. aperture circ. 6 m.; anfr. ult. 73 m.; anfr. penult. cire. 
10m. 
Hab. ? (Mus. Cuming). 
This variety is not unlike Vermetus cercus, Carp., chiefly so in 
shape; but the sculpture and colour remind one of var. 7. corallio- 
phila. The affixed side is thinner, white, and shows marks of a pearl- 
oyster. 
6. Bivonia constrictor, Morch. 
T. crassa, repens, laqueatim contorta, sordide lactea, primum 
roseola; anfr. convewxiusculi; latere externo dilatato; lire late, 
parum prominentes, subapproximate, versus marginem eaternum 
omnino evanescentes ; ruge incrementi prominentes, irregulares, 
leviter sigmoidee, in intersectionibus interdum obsoletissime 
nodulose ; anfr. ultimus pone aperturam contractus, breviter 
cylindricus, varicibus duabus equidistantibus crassis brevissimis 
arcuatis ; intus fere ubique castanea ; apertura soluta, cireu- 
laris, peripheria interna alba. 
Diam. apert. 7 m.; diam. anfr. ult. circ. 10-12 m. 
Serpula arenaria, Bowd. Elements, ii. f. 130, non absimilis. 
Hab. Australia (Mus. Cuming). 
’ One specimen, nearly half sunk in the surface of a calcareous con- 
‘glomerate, with an imbedded spine of an Echinus: it seems to be some- 
what corroding. The last whorl shows two varices, the first at the 
same distance from the second as that is from the aperture. The 
figure quoted is not unlike the principal specimen in the group, but 
the apertural tube is rather long. 
7. Bivonta GOREENSIS, Gm. 
T. teres, cancellata, flava, intus cornea, 8-9 pollices longa, striis 
elevatis, longitudinalibus confertis (Gm). 
