BY N. A. COBB. 399 



are arranged also in longitudinal rows. Conspicuous among the 

 dots are two longitudinal rows of circles arranged on either 

 side of each of the lateral lines at a distance apart equal to one- 

 third the A'idth of the body. The neck becomes convex-conoid 

 in front, and ends in a truncate head which bears near its anterior 

 margin ten seUie one-half as long as the head is wide, arranged in 

 the usual manner, the submedian pairs being of somewhat unequal 

 size The anterior part of the pharynx, one-half as deep as the 

 head is wide and one-half as wide as deep, is cyathiform, its 

 sides presenting twelve jointed ribs; at the base of this part of 

 the pharynx occurs a small and pointed dorsal tooth behind 

 which the pharynx narrows gradually, ceasing at 30(U, from the 

 anterior extremity. The lateral organs are rather obscure 

 spirals of five winds situated opposite the middle of the 

 phar^'nx, the right being a left-handed spiral and the left a 

 right-handed spiral, as usual; in size they are one-third to one-half 

 as wide as the head. There are no eyes. The simple oesophagus, 

 though at first only one-third, becomes finally one-half, as wide 

 as the neck; there is no bulb. The cardiac collum is shallow but 

 distinct, and the cardiac region rather transparent. The thick - 

 walled intestine is one-half as wide as the body. The ventral 

 excretory pore is situated just behind the nerve-ring. The lateral 

 fields are one-third as wide as the body. The anterior half of the 

 tail is slightly convex-conoid; thence it is setaceous to the barely 

 swollen terminus, which gives exit to the secretion of the caudal 

 gland. The anal region is slightly elevated. The two equal, 

 linear spicula are of uniform size and az'e parallel to the lateral 

 plane of the body in their proximal halves; thence they are 

 arcuate. Their proximfe are prominently cephalated by a sudden 

 flat expansion. The two accessory pieces are parallel to the 

 spicula and are nearly as long as they; but are, however, not 

 cephalated and are the wider distally. The blind end of the testicle 

 is as far behind the cardia as the latter is behind the lips. No 

 supplementary organs were seen. 



It is possible that this is a member of an hitherto unrecognized 

 genus, closely related to Cyatholaiinus, &c. 



