Booyie, Annelida, Cruises of "Alva" 83 



the apex of which exceeds slightly the length of the notocirrus, but 

 is shorter than the neuropodal spines. These neuropodal spines 

 arise from a base compressed cephalo-caudad, but are much wider 

 dorso-ventrally than the notopodal base. The neural spines are 

 inset in double series dorso-ventrad, and together with the base 

 form a fan-like "fin," the twelve to sixteen spines each being com- 

 posite, the proximal article being stout, horn-yellow, supporting 

 the distal article, a short, blade-like, strong, procurved distal hook, 

 the concave face of which is channeled by a median groove, bor- 

 dered on either side by an acuminate edge, which is coarsely den- 

 tate on the proximal third to half of each edge, having six to eight 

 teeth, with the two edges distally converging to the curved, acumi- 

 nate distal apex, which itself is a strong hook ; the apices of these 

 hooks and the dentate margins of the distal articles of about ninety 

 percentum of the complex setae are directed ventrad. The neuro- 

 cirrus is short, conic, not extending as far distad as the margin of 

 the fleshy base of the setae-tuft. The neurocirrus consists of five or 

 six thick annuli proximally and a narrowed distal, finger-like part, 

 composed of four or five annuli. The first anterior and last or 

 caudal pair of parapodia are greatly reduced in size, in ratio to 

 the other pairs. 



References : Lepidonotus wahlbergi, Kinberg, J. E. H. Kongl. 

 Svenska Fregatten Eugenies, under C. A. Virgin, Zool., Ill, 

 Annulaten, 1857-1910, p. 384, (separate (p. 12), pi. 4, fig. 

 14 a-h.— MclNTOSH, Wm. C, Kept. Voy, H. M. S. "Chal- 

 lenger" Zool., 1885, vol. XII, p. 66, pi. 11, fig. 1, pi. 18, fig. 8, 

 pi. 10a, figs. 15, 16. 



Aphrodita squamata, Pallas, P., Misc. Zool., Animal. Spec. 1766, 

 p. 91, (exparte) Kinberg dixit. 



