394 TRICOMA AND OTHER NEW NEMATODE GENERA, 



as wide as the neck, in its widest parts three-fourths as wide 

 as the neck. The cardiac collum is broad but distinct. The intes- 

 tine is three-fourths as wide as the body, and is composed of rather 

 transparent cells of such a size that three or four of them build the 

 circumference. The intestine of this little worm often contains two 

 or three other Nematodes two-thirds as long as the worm itself, 

 which have been swallowed whole, a fact which sufficiently attests 

 the rapacity of the species. The ventral excretory pore is situated 

 just behind the nerve-ring. The gland lies in the cardiac region ; 

 its duct is rather narrow, but the ampulla is distinct. The 

 indistinct lateral fields appear to be one-fifth as wide as the body. 

 The anterior fourth of the tail is conoid ; the remainder is very 

 narrow, flexible, and prehensile. The terminus is slightly swollen 

 and tipped with a much elongated outlet for the caudal glands ; 

 these latter, three in number, are situated in the anterior part of 

 the tail, just behind the anus. The vulva is rather conspicuous. 

 Vaginal glands are present. Each uterus usually contains a 

 thin-shelled unsegmented egg as long as the body is wide and 

 two-thirds as wide as long. The ovaries reach from one-half to 

 two-thirds the way back to the vulva and contain half-a-dozen 

 developing ova. The male remains unknown. 



Hab. — Coral bank. Bay of Naples, 1888, at a depth of thirty-five 

 metres. 



lY. Chromadora, Bastian. 



I cannot attempt to say what will be the final definition of 

 Chromadora. It is now known that a large number of forms 

 exist which must be reckoned either as belonging to Chromadora 

 or to closely allied genera, and already much has been accomplished 

 towards unravelling their relationships, notably by Dr. de Man in 

 a series of admirable memoirs ; but much remains to be done 

 before our knowledge of these worms can claim to be thorough. 

 I deal here with a species which T believe will be reckoned a 

 Chromadora. 



_ -6 9- 15- '48-' 86- ^ ^, x- i • 



C. minor, n.Sp. 1-7 3-2 3-7 4-8 2-8 ^■"""- The CUtlcle IS 



traversed by transverse striae resolvable with high powers into 



