michelson: terms of relationships 181 



from the structure of the narial capsule alone, which in the latter 

 group is fully ossified as in the Laniidae, leaving no external nasal 

 fossa. Since there is no other family to which the genus Tylas is 

 properly referable, it becomes necessary to provide one for its 

 accommodation, as follows: 



Tylidae, fam. nov. 



Family characters. — Bill relatively slender and thrush-like, the 

 culmen rather sharply ridged, the gonys rounded and but slightly 

 and gradually ascending, the culmen straight for its basal half, 

 gently decurved terminally; mental apex opposite anterior end 

 of nostril; maxilla conspicuously hooked at tip, the commissural 

 edge notched subterminally; nostril rather small, oval, non-oper- 

 culate, exposed, and situated in the anterior end of nasal fossa; 

 nasal capsule not ossified; feathering of forehead covering only 

 basal portion of nasal fossae; narial bristles rather weak, but 

 reaching to middle of bill; rictal bristles well developed; head 

 entirely feathered; nuchal hairs present but short; tail moder- 

 ately long, making up somewhat less than half the total length 

 of the bird, square or slightly emarginate, and composed of mod- 

 erately broad, stimsh feathers; wings much longer than tail but 

 much rounded, the first (outermost) primary spurius, but more 

 than half as long as the next, and neither secondaries nor tertials 

 lengthened; feet and legs of moderate size and length; tarsi scu- 

 tellate; femur pneumatic; ectepicondylar process of humerus much 

 reduced. 



The genus Tijlas Hartlaub, comprising the following five species, 

 constitutes this monotypic family : Tylas eduardi Hartlaub ; Tylas 

 alfredi Sharpe; Tylas albigularis Hartlaub; Tylas fulviventris 

 Sharpe; Tylas strophiatus Stejneger. 



ANTHROPOLOGY. — Remarks on terms of relationship. 1 Tru- 

 man Michelson, Bureau of American Ethnology. 

 Some years ago Kroeber 2 undertook to show that terms of re- 

 lationship are linguistic and psychological phenomena. Re- 



1 Published with the permission of the Secretary of the Smithsonian Institu- 

 tion. 



2 Journ. Roy. Anthrop. Inst. Gr. Brit, and Irel., 39: 77-84. 1909. 



