PLATE III 
A hitherto unrecorded specimen of Holopus -rangu from Barbados 
Fig. 
Fig. 
12. 
15. 
16. 
Lateral view of complete crown with encrusting base, from the 
trivial side. x 4/3 
Lateral view of interior, with bivial and one trivial arms re- 
moved; showing position of orals within a deep cavity . x 4/3 
Ventral view of same structures; articulating surface of brach- 
lals is well shown. x 4/3 
The orals: unretouched photograph. Note the water-porcs, 
and remnants of minute plates in the ambulacral furrows and 
some between the proximal ends of the orals and surrounding 
plates. «x 5 
Terminal part of an arm, showing the position of pinnulcs upon 
alternate brachials. x 8/3 
The specimen is in the author’s collection, now in the United 
States National Museum. 
