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BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



these families do not, so far as the records go, have these ohtrigona- 

 like or virgula-Wk^ Ophalinas. Indeed no member of the genus 

 Opalina, whether slender or broad, straight or curved, is known 



fi'om Australasia, and no Cepedea either. That is, no multinucleated 

 Opalinids are Australasian. 



It is noteworthy that no species of the genus Opalina is known 

 from South America, although both narrow and broad species are 

 found m tropical Central America. The Opalinae angustae are all 



