132 ^Ir. P. S. Abraham on some Genera depend, in some degree at least, upon the coloui of the fur. I have referred above to tlie slight importance of this character in determining species ; and the following remarks occur in my description of P. auri'tus (at p. 84, ' Monograph of the Asiatic Chiroptera '): — " Examples from Northern Africa and sandy districts in the neighbourhood of the Mediterranean and Caspian seas are much paler in colour throughout than those from moister countries. This I have frequently observed in sp.'cimcns of bats brought from desert regions." Many specimens of a Plecotus with very light-coloured fur, but not otherwise distinguishable from P. auritus^ were obtained by Dr. Stoliczka at Leh . 7. Rhinolophus euryale'} (Severtzoff), =1 R. ferruni-eqiLinum^ Schreber. Rhinolophus euryale^ Blasius, has not yet been recognized by other zoologists from any part of Asia north of the Hima-layas; hut R. fer7-um-eqiunum, which it resembles very closely, is abundant in the Himalayan region. Therefore I would suggest that this species, which has been recognized as R. euryale, with doubt, by Dr. Severtzoff, is probably R.ferrum-equinum. XV. — Notes on some Genera of Nudihranchiate Mollusca, with Notices of a neno Genus and of some hitherto unde-scrihed Species^ in the Collection of the British Museum. By P. S. Abraham, M.A., B.Sc, F.R.M.S., F.Z.S. [Plates VI. & VII.] Calycidoris, gen. nov. Corpus subdepressum ; pallium ultra caput et pedem extensum, papillis gracilibus obtectum ; tentacula dorsalia laminata intra foraniina retraetilia ; branchiae simplices, laminatoe, in cavitatem subretractiles, anum circumdataj, medialiter in dorso postico positae ; tentacula labialia in velum conjuncta ; lingua angusta, ordinem uncinorum unum undique in longiim exhibens. The body is rather depressed ; the mantle ample, extending over the head and the foot and bearing soft conical papillge. The dorsal tentacles are short and laminated, and retractile within sheathless cavities. The branchiaj are simply lami-nate, form a cup round the anus, together with Avhich they are contained in a common mantle-cavity, the wall of the latter being not completely contractile over them. The oral
XV.—Notes on some genera of nudibranchiate mollusca, with notices of a new genus and of some hitherto undescribed species, in the collection of the British Museum
BioStor
