272 PROCEEDINGS OF THE NATIONAL MUSEUM vol.83 



In anterior somites the neuropodial setae are much larger than the 

 notopodial, their basal joints homogomph and markedly cross stri- 

 ated. Their terminal joints are long, gently curved to sharp apices, 

 and finely denticulated along the concave border. In the notopo- 

 dium are two kinds of setae neither of which protrudes from the sur- 

 face as much as do the neuropodial. Those of the ventral part of 

 the tuft are similar to the neuropodial. Those of the dorsal part 

 have heterogomph transversely striated basal joints, the terminal 

 joints being short and blunt-ended and carrying a row of stiff spines 

 along one margin (fig. 19, i). The setae of the posterior portion of the 

 body have the broad paddle-shaped terminal joints characteristic of 

 the epitokous phase. 



The paragnath arrangement is: I, 2, one behind the other; II, 8 

 pairs, each being almost dumb-bell shaped, the first 6 pairs larger 

 than the others; III, numerous paragnaths arranged in 4 transverse 

 rows, with 4 smaller ones at either end; IV, 4 or 5 large paragnaths 

 with scattered smaller ones in front and behind ; V, 1 large and several 

 smaller ones; VI, 2 large ones; VII and VIII, 2 irregular transverse 

 rows. Each jaw is a curved dark-brown plate without any marginal 

 denticulations. 



Type.—V.S.^M. no. 20116 (Chen no. 26). 



NEREIS (NEANTHES) AMOYENSIS, new species 



The single specimen is incomplete, retaining the first 45 somites, 

 which in length measure 27 mm. The prostomial ^\^ldth is 1 mm, the 

 peristomial 1.5 mm. The \\ddest region is in the neighborhood of the 

 tenth setigerous somite. 



The prostomium (fig. 19, j) has a length a little greater than its 

 breadth, and the eyes are separated from each other by less than 

 their own diameters. The prostomium narrows immediately in front 

 of the anterior eyes, about one-third of its length from the posterior 

 border. The tentacles are less than one-third as long as the prosto- 

 mium and are separated at their bases by a distance less than their 

 own diameters. The basal joints of the palps extend to the ends of 

 the tentacles. In both palps the terminal joints are broken but look 

 as if originally they were rather narrow cylinders. The tentacular 

 cirri are slender and short, the longest barely reaching the anterior 

 border of the third setigerous somite. All other tentacular cu'ri are 

 shorter than the peristomium. 



The prostomium is twice as long as the first setigerous somite. 

 Later somites show slight increases in length up to the tenth, this 

 latter length being retained throughout the rest of the fragment. 



The thirtieth parapodium (fig. 19, k) has conical hps on the noto- 

 podium, the setal portion not showing as a definite lobe. The dorsal 

 cirrus is very long and slender, and there are two aciculae in the noto- 



