BY N. A. COBB 401 



marked by transverse strife, 2'2/a apart, composed of rows of bead- 

 like mai'kings easily resolvable with medium powers. In addition, 

 two longitudinal rows of circles occur in the lateral regions 

 separated by a space equal to one-fourth the width of the body. 

 Short hairs occur throughout the length of the body. The conoid 

 neck terminates in a squarely truncate head. Opposite the base 

 of the pharynx a circlet of ten cephalic setae, one-half as long as 

 the head is wide, are arranged in the usual manner. Each of the 

 six lips bears a seta one-half as long as the cephalic sette. Each 

 of the lateral organs is a spiral of four winds, that on the right 

 being a left-handed spiral and that on the left being a right handed 

 spiral; they are situated opjDOsite the base of the pharynx and 

 are one-third as wide as the head. Backward from the stronirlv 

 twelve-ribbed cyathiform pharynx, which is one-half as wide as 

 the head and one-half as deep as wide, extend three indistinct 

 chitinous structures which, doubtless, represent infoldings in the 

 upper part of the oesophagus ; if so then it is highly probable 

 that the pharynx should be regarded as extending back as far 

 as the posterior part of these structures. I wished much to 

 ascertain what movements the back part of the pharynx was 

 capable of, but could not satisfy myself. It seems to me likely 

 that Dr. De Man's Haliclioanolaimus gives some idea of the 

 movements possible in Cyatholaimus, of which Halichoanolainnis 

 is, so to speak, an exaggeration. The simple conoid oesophagus, 

 at first only one-half as wide as the neck, enlarges gradually to 

 two-thirds as wide ; it has a distinct chitinous lining and is 

 separated from the intestine by a distinct but rather shallow 

 constriction. The short cardia leads to an intestine three-fourths 

 as wide as the body, composed of cells containing loosely stationed 

 granules having a tendency to a tessellated arrangement. The 

 rectum has a length, in the female, equal to the anal bodv- 

 diameter. The ventral gland, situated just behind the cardiac 

 region, empties, by means of a narrow duct and a pyriform 

 ampulla one-fourth as wide as the neck, through the ventral pore 

 situated just behind the nerve-ring. The anterior fifth of the tail 

 is conoid, tapering much; thence the tail is setaceous, being one- 

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