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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 75 



The spermathecal pores are in 7/8 in he, close to 6. 

 There are two genital markings. The anterior marking is an 

 elongate, oval, lighter colored depression on 13/14, extending from 

 the setae of xiii, to the setae of xiv, and laterally on each side to 

 about half way between 6 and c. The posterior marking is a deep 

 depression in the body wall of xvii, in hh. On the floor of this 

 depression in the region aa are four elongate white papillae. External 

 to these papillae and also on the floor of the depression are the 

 columnar male porophores. The body wall around the mouth of 

 the depression lacks the brown pigment and is much wrinkled. 



Internal anatomy. — Septa 4/5 and 5/6 are much thickened, especially 

 5/6; 6/7 and 7/8 are missing; 8/9 and 9/10 and 10/11 are much thick- 

 ened and displaced posteriorly together; 11/12 is represented only by 

 the thin connective tissue which forms the wall of the median testic- 

 ular chamber. The remaining 

 septa are thin and attached 

 normally. 



The gizzard is subspherical. 

 There are calciferous glands in the 

 wall of the alimentary canal in xii. 

 The intestine begins in xv. 



There are large tufted masses 

 of nephridia adherent to the pari- 

 etes in iii. 



Posterior to the gizzard are 

 seven pairs of commissures, two 

 pairs under 8/9, one pair in the 

 median testicular chamber, and 



Figure 20.— Eutyphoeus planatus. a. Genital • • -i r 



AREA. 6. Tip of penial seta X about 412 One pair in each of segments ix, x, 



xii, and xiii. 



The testes and the male funnels are enclosed in a median chamber 

 on the posterior face of 10/11. The seminal vesicles are large, in 

 contact dorsally, and extend from 10/11 to 12/13, pushing 12/13 and 

 13/14 into contact with 14/15. The tubular prostates extend through 

 segments xvii-xx. The duct is confined to xvii and is looped several 

 times. 



The ovaries and oviduct funnels are in the usual positions in xiii. 

 The spermathecal ampulla is large and flattened out by the gizzard, 

 the duct is short and stout; a club-shaped diverticulum of three 

 seminal chambers is attached to the right and to the left sides of 

 the duct. 



Distribution. — Prome, Thayetmyo. 



Remarks. — The type-specimen is probably not a complete worm. 

 The posterior opening of the alimentary canal is not a normal anus 

 and the length of the worm is not as sreat as is usual in similar 



