149 
The so-called ‘ pyramidales’ muscles, which derive a great proportion 
of their origin from the ossa marsupialia, bear a direct ratio to 
those bones in size; and an attentive observation of the habits and 
modes of locomotion of the different marsupial species is still want- 
ing for a complete elucidation of the function of the marsupial bones. 
It is important to the paleontologist that the cartilaginous condition 
of the marsupial bones in the Thylacine should be borne in mind in 
regard to the evidences of the marsupial order that may be yielded 
by fossil remains: the fossil pelvis of the Thylacine, for example, 
had that species been long ago, as it soon is likely to be, extinct, 
would never have afforded the triumphant evidence to which Cuvier 
appealed in demonstration of the Didelphys of the gypsum quarries 
at Montmartre; yet the Thylacine would not therefore have been 
less essentially a marsupial animal. This may teach us to pause 
before drawing a conclusion against the marsupial character of the 
small Stonesfield mammalia, if their pelves should ever be found 
without trace of the ossa marsupialia. 
“Descriptions of new Shells, collected during the voyage of the 
Sulphur, and in Mr. Cuming’s late visit to the Philippines,” by Mr. 
Hinds. 
Abstract of the accompanying descriptions of shells :— 
The number of well-authenticated species of Terebra hitherto on 
record is about sixty. In the present paper exactly fifty more are 
added, all of which are presumed to have been hitherto unrecorded. 
Of this number sixteen are from the Indian seas, six are from the 
African seas, twelve are from the American seas, and five are from 
the Pacific ; and the whole, without exception, from within the Tro- 
pics. The localities of eleven are unknown. 
They most usually occur under a small incumbent pressure, gene- 
rally at a depth of from five to eighteen fathoms. Some are found 
about low water, and with much constancy they affect situations 
where the floor of the ocean is composed of sandy mud. 
Teresra, Bruguiere. 
Terepra rosusta. Ter. testd turrito-subulatd, solidd, ponderosd, 
albidd, flammeis longitudinalibus interrupt? pictd ; anfractibus infe- 
rioribus rotundatis, indivisis, levigatis, superioribus versis extre- 
mitatem spire subplanulatis, unocinguliferis, longitrorsum plicatis ; 
anfractu ultimo rotundato triseriatim picto, ad basin coarctato ; 
aperturd elongatd ; columelld arcuatd, subcallosd ; epidermide luteo- 
Juscd ; operculo parvo, crasso. Axis 57 lin. 
Hab. West coast of America, between 8° 57! and 21° 32! north 
latitude ; namely at Panama, Gulf of Nicoya, Gulf of Papagayo, and 
San Blas: in from four to eighteen fathoms, sandy mud. 
Cab. Belcher and Cuming. 
TEREBRA succINEA. Ter. testd subulatd, acuminatd, succined, le- 
vigatd ; anfractibus planulatis, lined impressd divisis, longitrorsum 
