BY N. A. COBB. 385 



tained in its cells are so arranijed as to srive I'ise to a tessellation. 

 The ventral gland is situated in front of the cardiac collum, the 

 ventral pore through which it empties being situated half-way 

 between the anterior extremity and the nerve-ring. The latter 

 encircles the cesophagus squarely. The lateral fields are only one- 

 fifth as wide as the body. The anterior half of the tail is conoid 

 from the rather inconspicuous anus; thence to the barely swollen 

 terminus, where the outlet for the secretion of the caudal glands 

 occurs, the tail is cylindroid and one-eighth as wide as at the anus. 

 The two equal, arcuate, acute spicula are of the usual form, i.e.f 

 are wider in the proximal part, and are one and one half times 

 longer than the anal body-diameter. The two accessory pieces 

 are parallel to the spicula and two-fifths as long as they. The 

 two testicles are of the usual foi'm, that is to say, both extend 

 forward atad are arranged one in front of the other, the antei'ior 

 being accordingly connected with the ejacultory duct by a longer 

 vas deferens. I could not make out whether or not the anterior 

 end of the posterior testicle was reflexed. A tubular supple- 

 mentary organ of the usual size was situated in front of the 

 spicula at a distance equal to one-half the length of those organs. 



This species, which is closely allied to A. acvininata, Eb., was 

 found in sand, near low-tide mark, Port Jackson, New South 

 AVales, Australia. 



•2 6-5 1 3-4 '39.'^° 78" 

 AnTICOMA TRICHURA, n.sp. -s i-g 2^2 ¥1 V6 ^ °^ "i™- Ihe 



skin of this well defined species is destitute of stria?, and bears for 

 the mostpartnone but most inconspicuous hairs. Four short closely 

 approximated pectoral hairs occur on each side of the head at a dis- 

 tance from the anterior extremity equal to twice the width of the 

 head. The neck is conoid and ends in a rounded head bearing six 

 equal setse, each three-fourths as long as the head is wide. The 

 three confluent lips are surmounted by six papillae, two on each lip. 

 The lateral organs, in the form of transverse slits, are situated 

 just behind the cephalic setse. There are no eyes. Through the 

 simple conoid pharynx the food passes into a conoid oesophagus, 

 one-half as wide as the neck, the lining of which is not very 

 26 



