GENERA INCERTAE SEDIS 245 



Hab. Parasitic in a Fish (Lophius piscatorius) . 

 Genotype : D. crinalis Wedl, 1855. 



Wedl, 1855, Sitz. k. Akad. Wiss., Wien, xvi, 384. 



Wedl's description of this worm is very inadequate, and he 

 makes no distinction between the sexes. It may be a larval 

 form, but it seems possible that the orientation of the worm was 

 mistaken, and that the protrusible processes of the " head " 

 were in reality the spicules of the male. 



10. Diplolaimus v. Linstow, 1876. 



Cuticle imstriated. Head with a hemispherical expansion, 

 which has fine bristles on its periphery, is divided by longi- 

 tudinal furrows and shows internally several chitinoid rings. 

 The lumen of the anterior fifth of the oesophagus is funnel- 

 shaped, with chitinized walls. The oesophagus is greatly 

 thickened behind this funnel, and is also somewhat swollen 

 behind, but has no bulb. The tail is finely pointed, and a 

 caudal gland is present. 



Hab. Fresh water. 



Genotype : D. gracilis v. Linstow, 1876. 



V. Linstow, 1876, Arch.f. Naturg., xlii, i, 16. 



It appears quite impossible to determine the relationships 

 of this genus. According to Micoletzky, the genotj^pe is 

 probably the larval form of a parasitic species. 



11. Eubostrichus Greeff, 1869. 



Body long and filiform, enclosed in a peculiar covering of 

 closely entangled or cemented hairs. This covering is 

 apparently not a part of the cuticle, and may be a secretion. 

 Head not distinct, with bristles. Mouth-opening funnel- 

 shaped. " Oesophagus " cylindrical, narrow, without bulb 

 or with a posterior muscular bulb. Male unknown. Anus 

 of female terminal. 



Hab. Marine. 



Genotype : E. filiformis Greeff, 1869 (by page precedence). 



Greeff, 1869, Arch.f. Naturg., xxxv, i, 117. 



The anatomy and systematic position of this genus are very 

 uncertain. From Greeff's figures it seems possible that the 

 organ described as the oesophagus may in reality be a long, 

 tubular buccal capsule, or even a stylet like that of the 

 Anguillulinidae, and that the true oesophagus may have been 

 mistaken for the begimiing of the intestine. In E. filiformis 

 the " oesophagus " is figured as a simple, cylindrical tube, 

 while in the other species, E. phalacrus Greeff, it has a mus- 

 cular ( ?) bulb at its posterior end. 



