774 anticoma: a genus op free-living marine nematodes. 



spicuke, theii' accessory pieces, a caudal gland and, higher up, the 

 small sigmoid accessory organ. The form of the end of the tail 

 is illustrated by the smallest of the figures ; x 350. A portion 

 of a $ is shown at the left, x 120 : one half the sexual organs 

 and a portion of tlie tessellated intestine are shown ; an egg lies 

 near the inconspicuous vulva, and this last, with the four 

 adjacent glands, is shown in ventral view in the only remaining 

 figure, x200. 



Fig. 2. — $ organs of A. typka. To the right the entire apparatus, x 150: 

 to be seen are the anterior straight testicle, the posterior testicle 

 with reflexed extremity, the vas deferens (grey), and the long- 

 narrow ductus ejaculatorius ending below between the two 

 spicuh« and accessory pieces. To the left above, three phases 

 in the development of the spermatozoa ( x 900) ; each phase is 

 placed opposite the part of the testicle in which it occurs. The 

 two lower left-hand figures show the histological details of the 

 vas defei-ens and the ductus ejaculatorius at the points opposite 

 which they are placed, x 450. 



