22O Bulletin American Museum of Natural History. [Vol. V, 



not blackish plumbeous as in H. anomalus. A series of adults 

 of H. alleni, measured in the flesh, give the following dimensions : 

 Total length, 250 (238-260) mm. ; head and body, 122 (112-135) 5 

 tail, 128 (175-136); hind foot, 29 (28-30); ear from crown 

 (measured from the dried skin), 10. 



In general, H. alleni differs from H. anomalus in its much 

 smaller size, in the very much smaller ears, in the tail being hairy 

 and slightly tufted, and radically in coloration, H. anomalus 

 being very much darker at all ages, and entirely lacking the ful- 

 vous lateral line seen in H. alleni. In fact, as recently pointed out 

 by Mr. Oldfield Thomas (Ann. and Mag. Nat. Hist, 6th Ser., XI, 

 1893, p. 329), these two species belong to very different sections 

 of the genus, 1 in respect especially to the character of the hind 

 feet, H. anomalus belonging to the section having the soles naked 

 and 6-tuberculate, and H. alleni to the section with the soles 

 hairy and 5-tuberculate. 



This species made its home beneath the roots of forest trees. 

 The pouches are used to carry food. One specimen had no less 

 than fifty-three seeds the size of peas in its pouches, while the 

 pouches of most of the specimens captured contained a few 

 kernels of the corn used as bait which they had stored away 

 before springing the trap. 



22. Loncheres guianae Thomas. 



Loncheres guiance THOMAS, Ann. and Mag. Nat Hist. 6th Ser. II, 1888, p. 

 326 (Demerara) ; Journ. Trinidad Field Nat. Club, I, No. 7, 1892, p. 166 

 (Trinidad). 



This species is represented by five specimens, all females, and 

 all taken in the mangroves at the mouth of the Caroni River. 

 Four are adult, the other is a half-grown young one. One of the 

 specimens was collected by Mr. Chapman, April 29, 1893, and 

 the others, taken June 10 and n, were collected and presented 

 to the Museum by Messrs. F. W. Urich and R. R. Mole, of Port- 

 of-Spain. Three of the adults are skins, with the skulls ; the 

 other two specimens are skins preserved in alcohol. The June 

 adults all contained foetuses, two of which are preserved in 

 alcohol. 



1 Mr. Thomas, however, appears not to have had full-grown specimens of H. alleni. 



