1865. ] MR. H. ADAMS ON NEW MOLLUSKS. 753 
and phalanges, there is a large piece (two-thirds) of a sacrum, and 
two upper cervical vertebree. 
The remaining determinable fragments belonged either to a Duck, 
more than one-fourth larger than the Common Mallard (Anas bos- 
chas), or, which is more likely, to a small Goose, about the size of 
the Brent Goose (Bernicla brenta). There were a nearly perfect 
thigh-bone, the lower part of a tibia, the distal and middle part of a 
radius, the middle part of an ulna, the largest metacarpal, and the 
upper half of a coracoid, belonging to this small Anserine bird. Mr. 
Erxleben, who has so beautifully figured the best of these remains 
in the plate which is now exhibited, suggests, from the size of the 
fragments and the generally injured condition of the condyles even 
in the unbroken bones, that the birds had been carried into the cave 
and eaten by foxes. 
11. Descriptions or A New Genus AND soME New SPECIES OF 
Mo.uvusks. By Henry Apams, F.L.S. 
Macron wrieati, H, Adams. 
M. testa ovato-trigona, solidissima, subumbilicata, alba ; spira brevi, 
anfr. 4, convexiusculis, superne tabulatis, anfractu ultimo magno, 
transversim sulcato, sulcis postice evanidis, antice tribus valde 
distinctis ; sutura canaliculata ; apertura ovali, 2 totius longitu- 
dinis teste; columella arcuata, callo postice copioso, canali brevi, 
recurvo ; labro postice inflexo, antice sinuato-dentato. 
Long. 75, lat. 52 mill. 
Hab. Coast of Patagonia (Coll. mea). 
The specimen from which the above description is taken was 
obtained, I am informed by Mr. Wright, from the coast of Pata~ 
gonia. It is very much beach-worn, but when in a fresh state was, 
I have no doubt, covered with a thick dark epidermis like the other 
species of the genus. MW. wrightii differs from M. hellettii, which 
it most resembles, in being larger and more solid, and in its short 
spire and trigonal form. 
The genus Macron has hitherto been considered a subgenus of 
Pseudoliva; but having recently seen the operculum of M. kellettii, 
which is unguiculate, while that of P. levis (the type of Pseudoliva) 
is purpuroid, Macron must be separated, and take rank as a genus. 
EGLISIA MACANDRE&, I. Adams. 
E. testa subsolida, pallido-fulva; anfr. 13, rotundatis, cingulis 
obiusis spiralibus (quorum tres majores sunt) ornatis ; interstitiis 
lamellis acutis, tenuibus, subdistantibus, longitudinalibus cancel- 
latis ; apertura orbiculari ; columella incrassata, antice effusa et 
refleva ; labro simplici, acuto, intus sulcato. 
Long. 15, lat. 83 mill. 
Hab. Gibraltar (Coll. M‘Andrew.). 
A single specimen of this interesting addition to the genus Eglisia 
Proc. Zoou. Soc.—1865, No. XLIX. 
