84 



U.S. NATIONAL IVIUSEUM BULLETIN 292 



other hand, lai'ge specimens were observed in the swift cun'ent, as 

 well as in the quiet pools. For several miles up the Layou River from 

 its mouth, juvenile and small subadult Xiphocaris were present in 

 the littoral portions of the river, but were never seen far from the 

 shoreline. Here, too, they were frequently found clinging to the lee 



6 8 10 



Carapace Length (mm) 



12 



Figure 18. — Scatter diagram showing correlation of the proportionate length of the rostrum 

 with growth in specimens of Xiphocaris elongata collected on Dominica in 1964. 



