eed GARMAN — CHIMROIDS 
IgOl 
ba i 
= 
Proboscis short, ending in a leaflike appendage ; 
Lateral canal system tubular ; 
Notochord without rings ; 
Hemispheres far from olfactory and nearer optic lobes. 
Callorhynchide , 
Proboscis long, pointed ; 
Lateral canal system subtubular ; 
Notochord with rings ; 
Hemispheres distant from both olfactory and optic lobes. 
Rhinochimeride. 
The frontal holder is present on the males of Havriotta and of 
Rhinochimera, as on those of Chimera and of Callorhynchus, the 
published statements to the contrary notwithstanding ; and it may 
be added that this holder is only acquired by the young male some- 
what late in his existence, about the time he becomes sexually 
mature and the ventral claspers have approached functional ma- 
turity, the advent of the holder coinciding nearly with the begin- 
ning of its period of utility. 
Museum of Comparative Zodlogy, 
Cambridge, Mass., U. S. A. 
Oct. sitq) LOOT 
