i'U CROTALUS HORRIDUS, VAR. UNICOLOR. 



specimen is longer than that of the snake from Aruba. As 

 to the arrangement of the scales on the head it wholly 

 agrees with the first mentioned .specimen , nnd has 160 

 ventrals, one undivided anal and 28 caudals, the first of 

 which is divided in two. 



Moreover, two specimens from Aruba are still living in 

 the Zoological Gardens of the R. Z. Society »N. A. M." 

 at Amsterdam. They were also collected during the Expedition 

 and have been presented to the forenamed Society. One of 

 them resembles the first mentioned specimen in color and 

 in the total absence of any marking , the other is also 

 of the same color, but shows on the back a trace of 

 lozenge-shaped spots. Both have the bluish black color on 

 the lower surface of the end of the tail. 



JBuifnchin. 



1. '^ Rana Co pit, Blgr. 



One specimen with tadpoles from Aruba. According to 

 the inhabitants of the island, this specimen is not the 

 »dori" (the native name of the frog common in Aruba) , 

 which frog creeps into the ground during the dry period, 

 and consequently was not to ',be seen when the Expedi- 

 tion visited Aruba. 



2. Dendrohates trivitfatus, Spix. 

 One specimen with tadpoles from Surinam. 



3. Phryniscus cruciger, Mart, 

 Many specimens from the coast of Coro (Venezuela). 



4. B ufo tnarinus , L. 

 Two specimens from Surinam. 



5. Hyla maxima., Laur. 

 One specimen from Surinam. 



Notes from the Leyden Museum, Vol. XX. 



