70 



latter colour ; the remainder of the upper mandible, from the fore- 

 head to the poiot, is of a rich orange ye]low. The bare space round 

 the eyes is of a blueish lead colour. 



In one specimen which has fallen under Mr. Gould's observation, 



the salmon colour toward9 the base of the mandibles is entirely 



y,,anting, its place beinp: occupied by a dull black, only less inteiise 



han that of the oblique line which borders it, and which passes from 



near the cidmen at the base of the bill to the edge of the gape at 



about one third from the tip. 



la the colours of its plumage thisbird agrees so completely witb 

 Rhamph. ambiguus, Swait>8., (Zool.Illust.pl. 168,) as to induce a 

 suspicion of their specific identity. But unless the colours of the 

 bill aiid their disposition have been incorrectly observed by the 

 artist \vhose dravving was used by Mr. Swainson, the t«o birds may 

 be regarded in these particulars a.s really distinct. 



RnAMPHASTOs cuLMiNATUS. Rhamph. ater ; gutture pector.eque 

 albis ; Jascid pedoris posticd tectricibusque caudce inferioribus 

 coccineis ; uropygio sulphureo, plumis versus apices in aitrantium 

 transeuntibus. 



Long. 18-20 unc. ; caudcE, 6^-1 ; alte, 8^-9; tarsi, 2. Rostri 

 long., 4-5; ad basin lat., vix 1, 



Hab. in Mexico. 



The bill h black, with a broad line of pale straw yellow run- 

 ning the whole length of the culmen, from which a band of the šame 

 colour passes downwards encircling the base of both mandibles. 



This specJes resenvbles the Rhamph. Cuvieri, Wagl., wbich ap- 

 pears toMr. Gould to be synonymous with Rhantph.Erythrorhynchus, 

 the bill of which, he statės, changes its colour according to the sea- 

 son from a brilliant scariet to black. 



Pteroglossus HYrOGLAucus. Pler. olivaceo-brunneus, subtiis 

 eceruleo-canus ; vertice, occipite, cauddque nigris, rectricibus qua- 

 tuor intermediis ad apicem hrunneis ; remigvm pogoniis exlernis 

 viridibus, internis brunneis ; uropygio lutescente ; tectricibus 

 cauda; superioribus viridi-olivaceis. 



Long. 184- unc; caudce, 7 ; alce, 64 ; tarsi, \^. Rostri long. 4; 

 alt., l4; lat. ad basin, l^. 



Hab. 



The varied colouring of this bird, and particularly the uniform 

 silvery blueish grey of its under surface, afford a ready distinction 

 of it from all the other Toucans. Its upper mandible is edged on 

 its basai aspect by a narrow line of yeliow, succeeded by a tri- 

 angular spot of black ; then folIows an irregular mark of yellou', 

 edged by a narrovv irregular black line ; the ręst of the upper 

 mandible throughout the whole of its admen andsides isdeep blood 

 red : the lower mandible, for the basai half of its length, has the 

 yellow aiid black colouring of the upper, but instead of terminating 

 in red, this colour is exchanged for deep black. 



The exhibition was resumed of the new species of Shells, form- 

 ing part of the collection made by Mr. Cuming on the western 

 coast of South America, and among theislands of the South Pacific 



