Dv. T. Gill on the Genera Tremarctos and ^hxvmo,. 15 



III. — On a New ParascylHum from IIobso7i^s Bay. By 

 Frederick M^Coy, Professor of Natural Science in tlie 

 Melbourne University, and Director of the Melbourne 

 National Museum. 



[Plate 11.] 



To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, 



As only one species of ParascyUium is noted in Dr. 

 Giintlier's Catalogue, I beg to give you a brief description of 

 a different one, not very uncommon near Melbourne. 



ParascyUium nuchalis^ M'Coy. 



Spec. char. Body and fins clouded with two shades of 

 chocolate-brown, with a broad blackish-brown nuchal collar 

 extending from the base of the pectorals to halfway between 

 the eye and the first gill-opening, and two or three very con- 

 spicuous large spots of the same dark colour on each of the fins ; 

 the whole of the sides and back covered Avith white spots, 

 smaller and more crowded on the dark nuchal collar ; under- 

 side of throat and abdomen pale whitish brown. Mouth nearer 

 the extremity of the snout than to the eye. 



Length 2 feet 9 inclies ; snout to anterior edge of orbit 

 1 inch, to base of pectoral 3|^ inches, to origin of ventrals 11^ 

 inches, to origin of first dorsal 14| inches, of second dorsal 

 20| inches, of anal 20 inches, to caudal 25 inches ; girth 7 

 inches. 



This beautiful species is adult at the above size, and is 

 easily recognized by its brown-clouded body, dark, wide half 

 collar, and conspicuous round white spots. 



IV. — On the Genera Tremarctos, Gervais (Nearctos, Gray), 

 and iElurina, Gervais (Ailurogale, Fitz.). By Theodore 

 Gill, M.D., Ph.D. 



In the ' Annals and Magazine of Natural History ' for August 

 1873 (vol. xii. p. 183) Dr. Gray has differentiated from the 

 genus to which he had formerly referred it {Ilelarctos) the 

 Ursus ornatus of Frederick Cuvier, giving to that species the 

 new generic name "Nearctos.''^ A distinct subgenus had, 

 however, been long previously proposed for that species by 

 Gervais (' Hist. Nat. des Mammiferes,' tome ii. 1855, p. 20), 

 and named 1)y him Tremarctos. The name evidently refers 

 to one of the characters mentioned as peculiar — the supra- 



