156 



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

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

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

 close attachment with only thin cartilage intervening between the 

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

 he conceives that, ceteris paribus, it is immaterial whether the union 

 be that of anchylosis or not, provided the junction be firm and in- 

 timate. 



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

 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 paradiscBus, 

 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 observes 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 natural arrest, 

 it is true — that anchylosis has not been effected. 



Mr. Gould, at the request of the Chairman, exhibited drawings of 

 ten species of Ramphastidce which had become known to him since 

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

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

 ciety. He now named and characterized the remaining ones as 

 follows. 



Ramphastos citeeopygus. Ramph. tectricibus caudte superioribus 

 sulphur eis. 



Long. tot. 20 poll.; rostri, bf, ala, di ; caudae, 6 ; tarsi, 2. 



Hab. in Brasilia .'' 



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

 culmineque prope basin flavis. Pectus albidum flavescente tinctum. 

 Torques pectoralis coccinea latiuscula. Orbitae tarsique plumbei, hi 

 saturatiores. 



Ramphastos osculans. Ramph. rostro nigra, culmine fascidque 

 basali stramineis ; pectore in medio aurantiaco. 



Long. tot. 18 poll.; rostri, 4-5-; alte, 7-i-; caudce, 6^; tarsi, 1^. 



Hub. in Brasilia. 



Descr. -Rff»?/?A. cw/miwff/o, Gould, quamproximfe accedit. Pectus 

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

 tica albse. 'lorques pectoralis subangustata. 



