518 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



The species described here conforms to the diagnostic features of 

 the family Lithoglyptidae, and except for certain specific differences 

 it is very similar to "Chytraed" ampulla. This similarity extends to 

 the details of the attachment area clearly illustrated by Aurivillius 

 (1894) but disputed by Utinomi. The attachment disc in our form 

 securely fastens the barnacle within its burrow. 



We therefore believe that Aurivillius did not place two barnacles 

 without attachment discs in a genus and family that he described as 

 having a disc whose function is attachment. "Chytraea" ampulla and 

 bicornis clearly belong to the family Lithoglyptidae and to the genus 

 Lithoglyptcs as originally described. 



Utinomi (1950b) described the family Berndtiidae to accommodate 

 a new species, Berndtia purpurea Utinomi (1950a). This barnacle is a 

 burrower that attaches by an adhesive disc. The diagnostic features of 

 the new family were such that it was necessary for him to include Lith- 

 oglyptes indicus in it. Since no particular diagnostic differences sepa- 

 rate the Berndtiidae from the Lithoglyptidae and since the latter was 

 described first, there is no justification for the family Berndtiidae. 

 Thus, Lithoglyptes indicus and Berndtia purpurea, along with Litho- 

 glyptes ampulla, Lithoglyjrtes bicornis, and the species described here, 

 constitute the family Lithoglyptidae. Weltneria spinosa Berndt (1907) 

 is placed incertae sedis in this family on the basis of its five pairs of 

 terminal cirri. It appears to resemble Berndtia; however, the descrip- 

 tion is incomplete. 



Family Lithoglyptidae Aurivillius (emend.) 



Lithoglyptidae Aurivillius, 1892, p. 133. 

 Berndtiidae Utinomi, 1950b, p. 457. 

 Chytraeidae Utinomi, 1950b, p. 457. 



Mouth cirri well developed, on a 2-jointed pedicle. Four to five 

 pairs of terminal cirri, but if only four pairs, caudal appendage present 

 (four pairs in original description). No gut teeth or gizzard in di- 

 gestive tract. Adhesive disc on mantle. Lateral bar absent. Bur- 

 rows in coral or mollusc hard parts. 



Key to the Lithoglyptidae 



1. Caudal appendages absent, five pairs of terminal cirri 2 



Caudal appendages present, four pairs of terminal cirri . . Lithoglyptes 3 



2. Burrowing in coral Berndtia purpurea Utinomi, 1950a 



Burrowing in Haliolis midae Weltneria spinosa Berndt, 1907 



3. Apertural hooks and spines absent, 6X4 mm. 



Lithoglyptes indicus Aurivillius, 1892 

 Apertural spines or hooks and spines present 4 



4. Apertural spines present (no hooks), 2.5 X 1.5 mm. 



Lithoglyptes bicornis Aurivillius, 1892 

 Apertural hooks and spines present 5 



