352 Mr. O. Thomas on the Types of the 



This would appear to be one of the original specimens 

 sent alive to Paris, and was mentioned as living there when 

 the animal was described. 



The single specimen referred to by Lataste in his ' Mammals 

 of Barbary' as undamaged by rickets is no. 19. 7. 7. 2272, 

 from Bou-Saada. The species remains one of the rarest of 

 Algerian mammals. 



Psammomys roudairei, Lat. 

 Le Nat. i. p. 492 (1881). Hub. " Chotts," Plateau of Tunisia. 



Lectotype. Female skin, no. 19. 7. 7. 1572, and its skull, 

 19. 7. 7/1573. 



Meriones trouessarti, Lat. 

 Le Nat. ii. p. 69 (1882). Hub. Bou-Saada, Algeria. 



Lectotype. Adult male skin no. 19. 7. 7. 2902, and its 

 skull, 19. 7. 7. 1566. 



Meriones ausiensis, Lat. 



Le Nat. ii. p. 77 (1882). Ilab. Oued-Akarit, Aumale, High Plateau 

 of Algeria. 



Lectotype. Adult female skin, 19. 7. 7. 29LK5, and its skull, 

 19. 7. 7. 1567. 



Meriones gcetulus, L'lt. 

 Le Nat. ii. p. 83 (1882). Ilab. Tilremt, near Lagliouat. 



Lectotype. Adult female skin, B.M. no. 19. 7. 7. 1561, and 

 its skull, no. 19. 7. 7. 1560. 



Meriones longifrons, Lat. 

 P. Z. S. 1884, p. 88. Bab. Jedda, Arabia. 

 Lectotype. Male skeleton, B.M. no. 19. 7. 7. 2216. 



Meriones albipes, Lat. 

 Le Nat. ii. p. 101 (1882). Hub. Msila, High Plateau. 



Lectotype. Female adult skin, 19. 7. 7. 1570, and its 

 skeleton, 19. 7. 7. 1571. 



A co-type of M. albipes, the separate skull mentioned in 

 the original description, had already been presented to the 

 British Museum (no. 82. 7. 29. 10) — this now becoming a 

 lectoparatype. 



