TABLE 4 (Continued) ===============+===========================+============================ Character | _S. sila_ | _S. sordida_ ---------------+---------------------------+---------------------------- | | Alary Processes| One and one-half | Two and one-half | times as high as lateral | times as high as lateral | wing of premaxillary; | wing of premaxillary; | straight. | slightly convex | | anteriorly. | | Nasals | Short, wide, bearing | Moderately long narrowest | small posteromedial | anteriorly and | processes; not attached | posteriorly; not attached | to ethmoid. | to ethmoid. | | | | | | Ethmoid | Moderately long; entirely | Short; one-half to entirely | ossified; smooth | ossified; irregular | margins. | margins. | | Frontoparietal | Large, ovoid fontanelle; | Large, elongate fontanelle; | smooth margins; | smooth margins; | flanges absent. | flanges absent. | | | | | | | | Squamosal | Moderately large; anterior| Moderately small; anterior | arm extending | arm extending | 1/4 way to maxillary. | 1/4-2/3 way to maxillary. ---------------+---------------------------+----------------------------