Zoological Society. 227 



1835, and referring to the skin of an Aoudad, Ovis Tragelaphus, 

 Geoff., presented by the writer to the Society, and also adverting 

 to his endeavours to obtain the animal, which, from the description 

 of it given by the Arabs of the Desert, Mr. Willshire conceives 

 must be the Antilope Leucoryx described by Pennant. 



The exhibition was resumed of the new species of Shells contained 

 in Mr. Cuming's collection. Those brought on the present evening 

 under the notice of the Society, completed the genera Venus and Cy- 

 therea, which had been commenced at the Meeting on February 24. 

 The Shells now exhibited were accompanied by characters by Mr. 

 Broderip and Mr. G. B. Sowerby, which are given in the ' Proceed- 

 ings', under the following names : 



Venus tricolor, histrionica, fusco-lineata, Chilensis, lenticularis, as- 

 perrima, costellata, opaca, variabilis, discors, Cypria (a near relation 

 to the Linnaean Venus Paphia), crenifera, leucodon, Calif orniensis , 

 compta, ornatissima, Mactracea, pulicaria, obscura. 



Cytherea lubrica, alternata, tortuosa, affinis (may be a variety of 

 Cyth. tortuosa), Dione, varr. (3, y, vulnerata, planulata var. suffusa, 

 argentina, pannosa, pallescens, inconspicua, modesta, pectinata (var. 

 immaculata). 



Specimens were exhibited of numerous Thrushes, chiefly inhabit- 

 ants of the Himalayan Mountains and of India; and Mr. Gould, at 

 the request of the Chairman, brought them under the notice of the 

 Meeting, principally with the view of indicating those of the former 

 district as constituting a new form in the family Merulidce, Vig., for 

 which he proposed the generic name 



Ianthocincla. 



Rostrum fere ut in Cinclosomate et Turdo sed magis robustum : 

 mandibula superiore ad basin setigera. 



Nares basales, ovales, apertae. 



Alee breves, concavae, rotundatae; remigibus 6ta 7maque longiori- 

 bus, omnibus mollibus. 



Cauda subelongata, concava, rotundata; rectricibus mollibus. 



Tarsi elongati, robusti. 



Hallux digitum medium longitudine subaequans, ungue forli sub- 

 aequali munitus. 



Typus genericus. Cinclosoma ocellatum, Vig. 



Montium Hhnalayce Incolce. 



The chief distinguishing characteristics of the genus Ianthocincla 

 are the comparative length of the tarsus ; the length of the hinder 

 toe, and the great length of the claw by which it is terminated; the 

 roundness, concavity, softness, and yielding character of the wings 

 and tail ; and the peculiar fullness, lightness, and downiness of the 

 whole of the plumage, and particularly of that of the back and rump. 

 The downy nature of the covering is alluded to in the generic name. 



The following six species may be referred to it, viz. 



Ianthocincla ocellata (Cinclosoma ocellatum, Vig.), variegata 

 (Cinclos. variegatum, Vig.), erythrocephala (Cinclos. erythroce- 

 phalum, Vig.) ; and the following new species : Ianth. squamata, 

 ehrysoptera, rufogularis. 



2 G2 



