ON THE ANGUILLULIDÆ 95 
** Integument with transverse strie or dots. Œsophageal ring absent. 
+ Ocelli absent. 
į Uterus unsymmetrical. 
«22, TACHYHODITES. Pharyngeal cavity absent. Two peculiar colourless bodies on dorsal surface near 
anterior extremity. Vaginal glands wanting. Accessory pieces recurved. 
«23, Tuerıstus. Pharyngeal cavity hemispherical. Vaginal glands two, unequal, Accessory pieces 
recurved. 
24, SPHÆROLAIMUS. Pharyngeal cavity large, somewhat spherical. (Esophageal canal bounded by 
three longitudinal bands. Vaginal gland single, posterior. Spicules long, narrow, with a single 
posterior shield-shaped accessory piece. 
if Uterus symmetrical. 
25. Comesoma. Integument having lateral circular depressions near head. Pharyngeal cavity very 
small. Spicules long, narrow, with or without a very small posterior accessory piece. 
. Seira. Integument having lateral, convex, circular prominences near head. Pharyngeal cavity none. 
Œsophagus having a slight rounded swelling posteriorly. Spicules stout, curved, with two accessory 
to 
c 
pieces. : 
27. Oponrosius. Pharyngeal cavity none. Teeth doubtful. Spicules stout, curved, with two acces- 
sory pieces. 
Tt Ocelli present or absent. 
28. CyarnoLaımus. Integument with transverse striæ or rows of dots. Pharyngeal cavity cup- 
shaped, with longitudinal markings. (Esophagus cylindrical. Accessory pieces strong, four, in two 
pars. Caudal sucker elongated, cylindrical. 
B 
. SPILOPHORA. Integument with transverse rows of dots or striæ. Pharyngeal cavity cup-shaped, 
with longitudinal markings, and three processes extending backwards. Accessory pieces two, 
rather indistinct. Caudal sucker elongated, cylindrical. Œsophagus having well-marked swelling 
posteriorly. 
- CHROMADORA. Integument with transverse and longitudinal strie. Pharyngeal cavity rather in- 
distinct, three cuneiform processes extending backwards and in contact. Accessory pieces two, 
strong, hooked. Caudal sucker elongated, pointed. 
Qa 
© 
GENERA WHOSE CHARACTERS ARE INSUFFICIENTLY KNOWN. 
31. AMBLYURA, Hemprich and Ehrenberg. 
32. HemırsıLus, Quatrefages. 
33. PHANOGLENE, Nordmann. 
34. Ponronema, Leidy. 
35. POTAMONEMA, Leidy. 
36. Nema, Leidy. 
37. UROLABES, Carter. 
