Mayeb. — Staurocephalus gregaricus. 



PLATE 2. 



Fig 10. Dorsal view of Staurocephalus gregaricus, nov. sp., magnified 2 diameters. 



Showing tiie sexual segments contracted after the e.xpulsion of the 



genital products. 

 Fig. 11. Dorsal view of head, showing mouth opening. Magnified. 

 Fig. 12. Ventral view of head. Magnified. 

 Fig. 13. Side view of parapodium of the 40th segment from the head of the worm. 



[np) nephropore. 

 Fig. 14. Larva one day old. Showing the green-colored gland cells between 



the eyes. 

 Fig. 15. Larva ^ days old. ((jl) head glands. 

 Fig. 16. Larva 5i days old. 

 Figs. 17. (u) and (b) setae of a larva 5i days old. 



