Reptiles should also be put in alcohol, even if their great size only permits thus to preserve the skin, which is much better than to send it dried. In skinning snakes, it is necessary to leave the head, and to take care not to injure the scales. Great care should be taken too not to break the tails of lizards. It should be desirable to send the skeletons of fish and reptiles too large to be sent in spirits. These skeletons need not be perfect. It is sufficient to take of the flesh, and, afterwards, to dry perfectly, without taking them to pieces. The whole skeleton should be placed in a box with cotton or with very dry and fine sand. If it is too long, it could be separated into two or three parts. The following indications will point out the reptiles which, in the present state of science, would offer the greatest interest for the collections of the museum. _North America_--_Testudo polyphemus_ or Gopher. _Cistudo Blandingii_, Holbrook. _Emys rubridentris_, Leconte. _Emys floridaua_, id. _Emys mobylensis_, Holbrook. _Emys insculpta_, Leconte. _Emys aregoniensis_, Halbrook. _Emys hyeroglyphiea_, Holbrook. _Emys cumberlandensis_, id. _Emys conciuna_, Leconte. _Emys troostii_, Holbrook. _Emysaura serpentina_, Dum. Bib. (large ones). _Chlonura temminckii_, Holbrook (young and grown). _Trionyx muticus_, (large ones). _Trionyx spiniferus_, (large ones). As much as possible some living specimens of each of these kinds, as well as of all the other chelonians; these reptiles, whose flesh is eaten, abound in the markets of the United States. _Rana mugiens_ or Bull-frog; (living subjects). All the small kinds of lizards and serpents and all the batraciens urodeles, with persisting gills. Rattle snakes from the south which differ from those of the north (in alcohol). We have nothing or almost nothing in reptile from the Californio, Yutacan and Guatemala; _boas_, the _crested basilic_ and the _horrible heloderme_, a great lizard with tuberculiform scales, should be sent us. _Antilles._--Cuba nourrishes a prodigious quantity of reptiles which are entirely unknown to us. The museum possesses only some kinds of this class of vertebres from Jamaica.