Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION • WASHINGTON, D.C. 



Volume 112 1960 Number 3445 



LITHOGLYPTLS SPINATUS, A BURROWING 

 BARNACLE FROM JAMAICA 



By Jack T. ToxMlinson and William A. Newman 1 



While in Jamaica in the spring of 1959, Stephen A. Wainwright of 

 the Department of Zoology, University of California, collected spec- 

 imens of the coral Acropora palmata containing the large burrowing 

 barnacle, Lithotrya. At Berkeley we found associated with this bar- 

 nacle a minute burrowing barnacle that has proved to be not only a 

 new species, but a critical form in the taxonomic status of the families 

 Chytraeidae and Berndtiidae of the order Acrothoracica. This Jamai- 

 can acrothoracican has given us grounds for uniting these families 

 with an older family, the Lithoglyptidae. 



The family Lithoglyptidae was established by Aurivillius in 1892 to 

 accommodate three species of acrothoracicans: Lithoglypies indicus, 

 ampulla, and bicornis. Utinomi (1950b) established a family, the 

 Chytraeidae, in which he placed Lithoglyptes ampulla and bicornis 

 (under the genus Chytraea). This classification was made because an 

 adhesive disc was not mentioned in Aurivillius' description of these 

 two species, and Utinomi believed that they attached to their burrows 

 by means of their apertural hooks and spines. 



» The former is a member of the Department of Biology, San Francisco State College, San Francisco, 

 California; the latter is a member of the Department of Zoology, University of California, Berkeley, 

 California. 



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