INTRODUCTION. 



xui 



Berenicornis is the sixth genus, with two species, viz. comatus and macrourus (=albocristatus, 

 Cassin) : this genus being identical with Anorrhinus, Reich., and of a later date, cannot stand. 

 Tockus has twelve species: — sulcatus (=leucocephalus, Vieill.), ginginianus (=birostris, Scop.), 



GBJSETJS, GINGALENSIS, SUlcirOstriSjWsigl. ( = PANINI, Bodd.), PASCIATUS, MELANOLEUCUS, NASUTUS, 



poscilorhynchus (=nasutus juv., Linn.), erythrorhynchus, limbatus (=hemprichii, Ehrenb.), 

 and plavirostris. The arrangement of the various species into groups is effected with good 

 judgment ; but some of the genera, and especially the subgenera, are unnecessary. 



1854. Bonaparte, Conspectus Volucrum Anisodactylorum. 



A list of the Bucepotid.^ is given, similar to the one reviewed above, but with some new 

 genera added. There are two subfamilies, as before; but Bucerotin^ is divided into three 

 sections — a. Bucorvece, b. Bucerotece, and c. Tockece. The first includes the genus Btjcorvus, with 

 two species, abyssinicus and leadbeatepi ?, Vigors. I have been unable to find a description of 

 this last form. The second section, Bucerotece, contains nine genera and five subgenera. The 

 author commences with Ceratogymna for elata; Tmetoceros for atratus, cristatus, 

 cylindricus, buccinator, PisTULATOR, and cultratus, Sundev., which is the female of elatus. 

 Berenicornis and Buceroturus contain the same species as in the ' Consp. Gen. Av.,' given above. 

 Buceros has rhinoceros, rhinoceroides, sublunatus (= rhinoceros, Linn.), and lunatus (=sylves- 

 tris, Vieill.). Komraius (=Dichoceros, Glog.) has bicornis. Hydrocorax contains plani- 

 cornis. Hydroctssa has monoceros, Shaw (=coronatus, Bodd.), pica, Scop. (=coronatus, 

 Bodd.), and furthermore is divided into two subgenera: — Anthracoceros, Reich., for bicolor, 

 Eyton (=malayanus, Raffl.), and galeritus; and Anorrhinus, Reich, (instituted for quite 

 another form), for violaceus, Shaw (=coronatus, Bodd.), malayantjs, and exarhattjs. Bhyti- 

 ceros is divided into three subgenera, viz. : — a. Aceros, with nepalensis ; b. Cassidix, with 

 cassidix and corrugattts; c. Bhyticeros, with plicatus (=undttlatus, Shaw) and ruficollis 

 (=plicattjs, Eorst.). The third section, Tockece, has seven genera. The 1st, Calao, has sulcatus 

 (=leucocephaltts, Vieill.); the 2nd, Penelopides, contains sulcirostris (=manill.ze, Bodd.) and 

 panayensis (=panini, Bodd.) ; the 3rd, Meniceros, Glog. (forestalled by Lophoceros, Hemp. & 

 Ehrenb.), has ginginianus, Lath. (=birostris, Scop.) ; the 4th, Bhinoplax, Glog. (instituted for 

 vigil, Eorst.), contains griseus and gingalensis ; the 5th, Grammicus, contains pasciatus, 

 nasutus, hastatus, Cuv. (=nasutus, Linn.), and limbatus (=hemprichii, Ehrenb.); the 6th, 

 Bhynchoceros, has melanoleucus ; Tockus, the last genus, contains plavirostris and 

 erythrorhynchus. The second subfamily, Eurycerotince, contains Euryceros prevosti, which is 

 not a Hornbill and should not be included in this family. It will be seen that this author has 

 employed the various genera in a way never intended by those who established them, and in 

 several instances has placed together species belonging to entirely different genera. 



1855. Hartlaub, Journal fur Ornithologie. 

 TOCKUS SEMIEASCIATUS described. Species 39. 



1856. Blyth, Journal of the Asiatic Society of Bengal. 

 TOCKUS TICKELLI described. Species 40. 



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