Musk-Rat of Santa Lucia (Antilles), 205. 
to the menagerie *. Two years later Gosse remarks that the 
Mus pitorides of Desmarest, ‘¢ found in the Caribbean Isiands, 
has not the dentition of the Old-World rats, but resembles, in 
the structure of its molars, the South- erecean rats grouped 
by Mr. Waterhouse under the generic name of /esperomys” fT. 
From the published description and figures it is impossible 
to make more than a guess as to w hich group of Hespero- 
myine the musk-rats may belong; Winge was therefore right 
in saying that their closer San aro ig still unknown. 
The examination of a specimen from Santa Lucia in the 
British Museum (no. 53, 12. 16. 4), presumably the one 
mentioned in the P. Z. S. for 1849, shows that we have to do 
with the genus Oryzomys. 'The same may be said of the 
Martinique musk-rat ; one of the type specimens from Mar- 
tinique, presented by Plée to the Paris Museum, has found 
its way to the Leyden Museum, and its skull was kindly lent 
to me by Dr. Jentink. 
The detailed description, with figures, of these two skulls, 
together with the lower dentition of a third (extinet) species 
found by Prof. Gregory in a small ossiferous breccia of 
Barbuda, will be given in another place. 
The following is the synonymy of the musk-rat from 
Martinique :— 
Oryzomys pilorts (Zimmerm.). 
Rat musqué (Pilori), ), C. de Rochefort, Hist. Nat. et Morale des Iles 
Antilles de lAmeérique, p. 124 (1638). 
Musk Cavy, Pennant, Syn. of Quadr. p. 247. no. 183 (1771); 3rd ed. ii. 
p. 97 (1793). 
Cia, Species obscura, Erxleben, Syst. Regni Anim., Mammalia, p. 857 
(1777). 
Castor Piloris, Zimmermann, Zool. geogr. p. 509 (1777) 
Mus pilorides, Desmarest, Dict. Se. Nat. t. xliv. p. 433 (18 26); Wagner, 
Schreber’s Saéiugthiere, Suppl. ii. p. 444 (1845). 
Mus Desmarestir, Fischer, Syn. Mammalium, p. 316 (1829). 
Le Pilori, ¥. Cuvier (KE. Geottroy & I. Cuvier), Hist. Nat. des Mammif, 
iv. pl. cclviii. (1880). 
Fesperomys (Megalomys) prlorides, p. p., Trouessart, Le Naturaliste, 
no. 45, p.5 (1881); Ann. Se. Nat., Zool. xix. Art. no. 5, p. 13 (1885). 
Holochilus (Megalomys) pilorides, p. p., Lrouessart, Catal. Mamm, p, 520 
(1897). 
Hab. Martinique. 
* “ Mus (Hesperomys) pilorides,” Proc. Zool. Soc. London, 1849, 
p, 105. 
+ P. H. Gosse, ‘A Naturalist’s Sojourn in Jamaica,’ pp. 449, 450 
(1851). 
Ann. & Mag. N. Hist. Ser. 7. Vol. vii. 15 
