BY E. J. GODDARD. 



341 



triannulate. This arrangement would leave the last annulus of 

 the somite, which I have labelled xi. (fig. 13) unaccounted for, 



Fig. 13. — Semilageneta HUH, gen. et sp.n. 

 Diagram showing the metameric arrangement in the annuli. 



inasmuch as the sulcus behind this annulus certainly marks the 

 line of division between somites xi. and xii. This important 



