Gattij Man III- Lahorafory, St. Ati'Jri'ics. 10 



were about the length of the dorsal lainelUo. Tliere were 

 uo hooked bristles, aud the ventral division of the foot has 

 no hollow. An anal sucker. Tiie first species is Ncrhiidts 

 huf/irustris, De Quatrefages, from Bhicksocl Bay {Soutliern). 

 The head is acutely pointed, with a median riilge, 

 which runs backward to the third segment, on which four 

 eyes in a square are placed, and the sides have a flattened 

 process (peristomium), from which project a pair of short 

 tentacles of a golden-yellow colour, and these when separated 

 retain vitality for three days (Z)e <S7. Juseph). Beneath 

 them is a ciliated {groove with pigment-granules, and |)o.ssibly 

 witli urticating elements [De St. Juseph). The tentacle>, 

 as in allied forms, aid in procuring nourishment. JJudij 

 10 cm. long and 8 mm. broad, slightly tapered anteriorly, 

 and more so ])osteriorly, where it ends in a dorsal anus 

 with a multilobed ciliated border uot surrounded by cirri. 

 The colour is rose-red anteriorly (probably from the blood- 

 vessels), but from the fortieth segment, or thereabout, the 

 posterior region is didl green, almost blackish, but near 

 the vent the intestine is yellowish, and is usually filled with 

 Rlssoa parva. The first segment carries a brancliia, and has 

 a dorsal and a ventral division with bristles. There aie two 

 lamelUe, the posterior larger than in N.follosa and bordering 

 the branchia. Behind the anterior lamella is a flattened 

 disc with a tuft of bristles similar to the inferior lamella, 

 but longer. From the thirty-third to the forty-fifth segment, 

 according to the size of the individual, the inferior division 

 bears two or three bifid and hooded hooks, which by-and-by 

 increase in number to about twenty, and at the ventral 

 border a few wingless capillary bristles. Simultaneously, 

 the posterior lamella forms a margin only to the first part 

 of the branchia, which also is smaller. The feebly winged 

 bristles persist to tiie posterior end in the dorsal division, 

 but without accompanying hooks. In the last twelve or 

 thirteen segments the branehia progressively diminish and 

 disap|)ear. 



Mesuil and CauUery '^ (1917) describe this species as dimor- 

 phic, some eggs developing to typical Spionid larvtc, whilst 

 others in the spawn-mass develop directly without a pelagic 

 stage. Moreover, in the latter ease cannibalism occurs, the 

 authors assigning the title adelphophagy to the condition 

 (the poccilogony of Giard). De St. Joseph met with 

 Trichodiitu pedicu/us as a parasite on the branchiie ; whilst in 

 the interior of the branchiie and the tentacles he found 



* Comjjt. Reud, clxv. p. 264^. 



