156 



birds of ample wing, and of slow but untiring flight. Observing 

 them in the birds to wbicb he had before referred, he did not accu- 

 rately draw the line of distinction betvreen anchylosis, and a firm and 

 close attachment with only thin cartilage intervening betvveen the 

 bones. With regard to the eiFects produced upon aerial progression, 

 he conceives that, ceeteris paribus, it is immaterial whether the unioa 

 be that of anchylosis oi' not, p^o^^ded the junction be firm and in- 

 timate. 



Mr. Martin thinks it, however, probable that in the Adjutant, -vvhen 

 old, a bony union may take place ; the junction between the osfur- 

 catum and the sternum in the Society's skeleton of this bird being 

 so close as almost to admit of its being regarded as a kind of suture. 

 In an adult example of the Stanley Crane, Anthropoides paradiseeus, 

 Bechst., where the anchylosis between these bones is fairly perfected, 

 he finds traces of the obliteration of a similar mode of union. 



Referring to Mr. Allis's remark that in the Cranes the os furcatum 

 is rather a forked elongation of the keel than a distinct bone, Mr. 

 Martin obsen^es that the anchylosis "which takes place in those birds 

 does not render the os furcatum less a distinct bone in reality than 

 where its union is by cartilage or suture ; for in these latter cases it 

 is only by an arrest of the process of ossification — a natūrai arrest, 

 it is true — that anchylosis has not been effected. 



Mr. Gould, at the reąuest of the Chainnan, exhibited drawings of 

 ten species of Ramphastidce which had become knouTi to him since 

 he published, in 1834, his ' Monograph ' of that family. Severai of 

 these birds had already been brought under the notice of the So- 

 ciety. He now named and characterized the remaining ones as 

 foUows. 



Ramphastos citreopygus. Ramph. tectricibus cauda superioribus 

 sulphureis . 



Long. tot. 20 poU.; rostri, 5l; alce, 9i ; caudee, 6 ; tarsi, 2. 



Hab. in Brasilia ? 



DzscR. Rostrum (pro corporis ratione) minus, nigrum, fascia basali 

 culmineque propebasin flavis. Pectus albidum flavescente tinctum. 

 Torąues pectoralis coccinea latiuscula. Orbitse tarsique plumbei, hi 

 saturatiores. 



Ramphastos osculans. Ramph. rostro nigro, culmine fascidąue 

 basali stramineis ; pectore in medio aurantiaco. 



Long. tot. 18 poli.; rostri, 4^; alce, 7-į^; cauda, 64^; tarsi, I4. 



Hab. in Brasilia. 



Descr. 2?ffn!/?/^. c?/?»i2»«/o, Gould, quamproximė accedit. Pectus 

 aurantiacum, latera versus in flavum transiens; gula regioque paro- 

 tica albse. Torques pectoralis subangustata. 



