938 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. [60] 



EXPLANATION OF PLATE Vn. 



Fig. 6.— vHemitubifex insignis. 



Fig. 6 a. — The worm, natural size. 

 6 &. — One of the spines. 

 6 c. — The efferent duct, atrium, vesicula seminalis, prostata, penis, penis sheath, 

 oviduct (exterior and interior). A^umeroua muscles are seen attached 

 to the oviducts, r. s = vesicula seminalis. 

 6 d.—A part of the atilum, with the vesicula seminalis and the prostata gland. 

 6 e. — One of the receptacles. At its base are seen 3 winglike glands, 

 6 /. — One of the segmental organs. 



