398 Mr. J. E. Gray on a new species of Marmozette. 



19. Epidendrum (^Spathium) refractum ; folio carnoso ovato-oblongo 

 coriaceo obtuso, pedunculo elongato spathis plurimis falcatis ob- 

 tusis distinctis vaginato, racemo brevi 4 — 5-floro cernuo, fioribus 

 carnosis, sepalis oblongis acutis dorsali refracto, petalis ovalibus 

 subconformibus, labello subrotundo cordato trilobo basi biverrucoso 

 per medium calloso, lacinia intermedia abbreviata truncata. 



Caraccas (Linden, no. 618). 



A very singular plant, with six or seven herbaceous, equitant, di- 

 stinct falcate spathes on a peduncle about nine inches long. The 

 sepals are about three-quarters of an inch long. 



20. Epidendrum (^Euepidendrum) aquaticum ; caule ancipiti ramoso, 

 foliis lineari-oblongis acutis panicula siraplici pauciflora (aut ra- 

 cemo) paulo brevioribus, sepalis oblongis petalisque linearibus ob- 

 tusis, labello carnoso alte cordato cucullato basi ecalloso, clinandrio 

 utrinque bidentato. 



Brazil (Gardner, no. 4344) ; an aquatic. 



The branches of this are four or five inches long, the leaves from 

 half an inch to two inches. The flowers small and green. 



XLIX. — On a new species of Marmozette in the British Museum 

 Collection. By John Edward Gray, Esq., F.R.S. 



To Richard Taylor, Esq. 



My dear Sir, 

 Among the new Mammalia recently received by the British 

 Museum is a species of Marmozette, which is very interesting 

 as coming from Mexico, all the species hitherto described having 

 been found in the Brazils. I have named it, from the peculiar 

 colouring of its under side, the Red-bellied Marmozette. 



Jacchus rufiventer. 



Black, grisled by the white tips of the hair, which are more abun- 

 dant on the loins and thighs; chest, inner side of the legs, 

 under side of body and spot on the middle of the crown of the 

 head chestnut-brown; tail elongated, black; ears large, not 

 penciled. 

 Inhab. Mexico. 



This species is very distinct in its coloration from any other 

 of the described species. I was at first inclined to regard it as 

 a variety of Jacchus melanurus, but that species is described as 

 brown and fulvous beneath, and on comparing the longer de- 

 scription of the species given in Kuhl with our animal, it is evi- 

 dently distinct. 



Yours truly, 

 John Edward Gray. 



