Mr. Gouid stated in conclusioii, that this formerly limited group 

 iio\v constitutes a considerable family, or subfamiljs whose members 

 appear naturally to form themselves into at least tliree or four genera : 

 thus divided, the genus Tamatia, Cuv. (Capiio, Vieill.) contains 9 

 species, that of Lypornix, Wagl., 3 species; th?iX oi Monasa, Vieill., 3 

 species ; and that of Chelidoptera, Gould, 1 ; the latter being a generic 

 title provisionally instituted by Mr. Gould for the Lypornix tenebrosa, 

 Wagl., a species which difFers in many essential characters from all 

 the other members of the group, possessing as it does a very length- 

 ened wing, and being in every way adapted for povverful flight. He 

 obser\'ed, that he had consulted with M. Natterer on the propriety 

 of separating this bird from the other members of the group, in which 

 opinion that eminent naturalist had coincided, and at the šame time 

 stated, that it usually resorted to the topmost branclies of the trees, 

 whence it salUed forth over the forest in search after its insect food, 

 ■virhile, on the other hand, all the other members of the group kept to 

 low thickets and the neighbourhood of the ground. In their general 

 economy they offer a striking resemblance to the Shrikes and Fly- 

 catchers ; they are, ho\vever, more indolent in their disposition, and 

 sit motionless on a dead branch for hours together, until their atten- 

 tion is drawn to some passing insect, when they sally forth, capture 

 it, aud return to the šame branch, which they are known to freąuent 

 for months together. With the exception of three or four species 

 all the members of this group are confinedto the Brazils. 



Mr. Gould exhibited six species of the genus Cursorius, one of 

 \vhich was described as new by the appellation of Cursorius rufus. 



Cursorius rufus. Cur.frontecastaneo-rufoį occipite griseo.fascid 

 albd cincto hac suprU et infra lined angustd nigrd margiiiatd ; 

 nucha rufescente ; corpore summo rufescente brunneo ; guldalbidd; 

 pectore pallido fulvo hoc colore infaciam ventralem nigram mer- 

 gente į abdomine posteriare, crissoąue albis į remigibus primariis 

 nigris ,■ secundariis albis ; prymno P rectricibusgue caudts ad basin 

 brunneo-griseis harum duobus intermedius nota nigrd apicali ex- 

 ternis feri albis reliquis plhs minusve ad apicem albis nec non 

 nigra viacula griseum colorem singente ; rostra nigro ; digitis ni- 

 grescentibus ; tarsis ? albido flavis. 



Long. tot., 9 unc; rostri, \\\ alce, 5į; cauda, 2; tarsi, 3. 



Hab. in insulis Oceani Indici. 



The new species of Cursorius was from the islands of the Indian 

 Ocean, but from -o'hat paiticular locality Mr. Gould had not been 

 able to ascertain. It differs from Curs. Asiaticus, by being smaUer 

 in all its proportions, by having the -vvhole of the upper surface of a 

 rich rufous brown, and by not possessing a white band across the 

 rump. In its affinities it is closely allied to both Cnrs. Asiaticus and 

 Curs. Temminckii. 



Mr. Martin placed on the table two examples of the Potto or 

 Kinkajou from the Society's Museum, and, at the reąuest of the 

 Chairman, read some notes describing the dift'erences in colour, size, 



