1889. | ON LIZARDS FROM THE MUSEUM OF HALLE. 143 
Puiestopuysa, Fischer, 1883. 
Animal unknown, with the exception of the radula ; central tooth 
5-eusped; middle cusp the largest; laterals 4-cusped, strong ; 
marginals as the laterals. 
Shell that of a Physa, fragile. 
Distribution. Guadeloupe. 
2. On some Specimens of Lizards in the Zoological Museum 
of Halle (Saale). By G. A. BouLencrr. 
[Received March 6, 1889.] 
(Plate XV.) 
Having, at the request of Dr. O. Taschenberg, examined some 
specimens of Lizards belonging to the Museum of Halle, which have 
been named or described by Burmeister and Giebel, I beg leave to lay 
before the Society the results of my examination, and to append 
revised descriptions of two species from the Argentine Republic. 
1. GonGyLUS MELANOGaSTRICUS, Burmeister, Verz. Zool. Mus. 
Halle, 1850, p. 79 (nom. nud.), = Chalcides viridanus, Gravenh, The 
specimens are therefore not from Brazil, as stated by Burmeister. 
I may add, from the examination of fresh specimens of this 
Lizard recently brought to me by Mr. E. B. Poulton, who collected 
them in Grand Canary Island, that the colour of the lower surface 
is a bright yellow, which turns to black after some time in spirit. 
2. PLATYDACTYLUS ALBOMACULATUS, Giebel, Zeitschr. ges. Na- 
turw. xvii. 1861, p. 59, from Banka, = Gecko stentor, Cantor. 
3. PLATYDACTYLUS BURMEISTERI, id. ibid., from the same loca- 
lity, = G. monarchus, Schleg. 
4, PLATYDACTYLUS DEISSNERI, id. ibid. p. 60, from the same 
locality, = G. monarchus, Schleg. 
References to these three synonyms have been omitted from the 
British Museum Catalogue of Lizards. 
5. GyMNopacTyLus HoRRIDUS. (Plate XV. fig. 1.) 
Gymnodactylus horridus, Burmeister, Reise La Plata, ii. p, 522. 
Head once and a half as long as broad; snout a little longer than 
the diameter of the orbit, as long as the distance between the eye 
and the ear-opening; forehead plane; ear-opening oval, oblique, 
half the diameter of the eye. The adpressed hind limb reaches the 
shoulder. Digits slightly depressed at the base, with well-developed 
