84 UNITED STATES NATIONAL MUSEUM BULLETIN 29 6 



A segment count for the terminal cirri follows : 



Terminal 



cirrus: 1 2 3 4 



Ramus: ant.* post.** ant. post. ant. post. ant. post. ant. post. 



Segments: 16 19 19 20 29 31 32 33 33 30 



♦Anterior. **Posterior. 



The body segmentation is similar to B. purpurea, but no conical 

 body processes have been seen. 



The male : The dwarf male resembles those of B. purpurea insofar 

 as can be ascertained from dried specimens. They are found primarily 

 on the exuviae of the female, and come out of the burrow with the 

 female when the coral is decalcified. This is opposed to B. purpurea, 

 where the males are invariably found attached to the wall of the 

 burrow. B. nodosa males have been found singly (three times on the 

 female) and in sets of two (once on the female, once on the burrow 

 wall) . 



The burrow: The burrow is deeper than long in mature specimens. 

 The aperture, viewed from outside, looks much like a typed apos- 

 trophe: a slit tapered slightly at the attachment end. The average 

 dimensions of this external aperture, for ten specimens arbitrarily 

 circled on a piece of coral, is 1.1 X 0.5 mm. There might be a reaction 

 to the burrowing action on the part of the coral, because a white 

 shell of calcareous material surrounds the burrow, becoming especially 

 prominent around the external aperture. Perhaps this is a product of 

 the abrading action of the barnacle, forming fine granules which 

 accrete and fiU in the interstices of the coral's skeleton. 



Bakmodytes Utinomi, 1950b, page 91 



Diagnosis: Lithoglyptidae with four pairs of terminal cirri, without 

 a caudal appendage. 



Balanodytes taitvanus Utinomi, 1950b, page 91 



Figure 20 



Diagnosis: Balanodytes with orifice broadly arched, with a spinif- 

 erous projection on each side of its upper edge. Attachment area 

 weakly developed or absent. Fibrous lateral bar present inside of 

 mantle. Retractor orijicii absent, but retractor pallii rostralis present. 

 Color uniform yellowish in preserved and dried state. 



Distribution: Utinomi's description is based on a complete and 

 an incomplete female, which were lost in dissection. They both occupied 



