NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 3 1 1 



Neuropodia have palisaded rows of long, distally pointed setae that may 

 be sigmoid (S-shaped) and somewhat limbate (winged) in their distal 

 part. The neuropodial postsetal lobe may be short to long; it may be ex- 

 panded or inflated at the base. Branchiae are simple, cylindrical to broad- 

 ly flattened and laterally fimbriated ; they arise above the notopodium 

 and are directed upward. Their shape, number and distribution are of 

 specific importance. 



Postbranchial segments are slenderer than those in front; they are 

 usually cylindrical in cross section or appear moniliform. Their noto- 

 podia have only slender pointed setae sometimes accompanied by furcate 

 setae or acicular spines. A long to short filiform postsetal lobe is present 

 or absent. Neuropodia have slender distally pointed setae, sometimes ac- 

 companied by uncini which may be acicular or distally bidentate, or 

 hooked; the distal end may be covered with a hyaline hood that is 

 rounded or pointed. 



Genital papillae have been described for Paraonis (Paraonis) 

 gracilis (Monro, 1930, pp. 151-152), located in segments 30 to 60, a 

 little below and in front of the parapodium. The posterior end tapers to 

 a pygidial ring provided with a pair of ventrolateral processes, sometimes 

 accompanied by a shorter to longer midventral one; or it may be some- 

 what subspherical or the pygidium may be an unadorned collarlike ring. 



Anatomical details have been given by Mesnil and Caullery, 1898, 

 pp. 133-136. 



Nothing is known of their reproduction (Thorson, 1946, p. 103). 

 The large size of ova (see Paraonis gracilis oculata, below) suggests 

 that there are no pelagic larvae. 



Systematic Discussion 



Original generic, subgeneric, specific and subspecific names are listed 



alphabetically with citation unless discussed below. They are: 



Aonides fulgens Levinsen, 1883, pp. 101-103. Denmark. Referred to 



Paraonis {Paraonis) fulgens (Levinsen), see Fauvel, 1927a, p. 



71, fig. 24 g-1. 



Aonides gracilis Tauber, 1879, p. 115. Denmark. Referred to Paraonis 



(Paraonis) gracilis, see Cerruti, 1909, p. 504. 

 Aricidea Webster, 1879, p. 255, erected for A. fragilis Webster, see 



below. 

 Aricidea (Aedicira) , new subgenus, erected for Aricidea pacifica Hart- 

 man, see below. 



