14 University of Michigan 



Thanks to ]\Ir. James Zetek and Dr. Clark, both connected 

 with the Board of Heakh Laboratory at Ancon, we were not 

 only able to have specimens brought in to the laboratory and 

 preserved during our absence in Darien, but were given a 

 number of specimens which from time to time had been 

 brought to the laboratory for examination, lusually to deter- 

 mine whether or not they were venomous. 



Among the rarities so found by Brooks and myself were 

 Coecilia sabogae Barbour, previously only known from the 

 Pearl Islands. This specimen agrees w-ell with the type and 

 has 14 or 15 vomerine teeth, eight or nine teeth on each 

 side of the upper jaw; eight teeth on each side of the outer 

 row of the lower jaw and three on the inner row. The four 

 anterior maxillary and mandibular teeth are much enlarged. 

 This species is now to be recorded from the vicinity of Ancon. 



Among the snakes, Micrurus nigrocincfus (Gir.) and its 

 remarkable counterpart, Ery\throlamprus aesctilapii (Linne), 

 caught within a few days of each other in almost the same 

 spot and under similar conditions, offered a most graphic 

 exposition of this ill-explained phenomenon of "mimicry." In 

 any case, whatever may be the cause of the coloration, in both 

 species the similarity is almost certainly purely fortuitous. 

 Hima/ntodes elegans (Jan.), known from Costa Rica and Gua- 

 temala, occurred with H. cenchoa (Linne) about Ancon. Lep- 

 tocalamiis torquatus Giinther is another rare and little known 

 species represented by two specimens in our Ancon collection. 

 The ten other species secured were all common and already 

 well known from the locality. 



One novelty has, however, appeared, a single Micrurus, 

 and one which has been carefully examined by my friend, 

 Dr. Dunn, who is particularly interested in this genus. It is 



