3o EXPEDITION ANTARCTIQUE BELGE 



Beania Hydesia (Jullien) 



(PL I, %. 7) 

 Diachoris Hyadesi Jullien. Mission scientifique du Cap Horn, vol. VI, i885, p. 74. pi. VII, fi.gs. 1. 2. 



A spécimen, from the Straits of [Magellan, lias one short triangular avicularium on the 

 dorsal surface, situated on a slightly raised chamber. The position is strange, and no avicu- 

 laria hâve been described previously, nor could I find any in the spécimens in Jullien's 

 collection. The zoœcia are so close together, that the tubular connections can frequently 

 not be followed either on the anterior or dorsal surface. The thick radicle is situated near 

 the proximal end, and terminâtes in cervicorne attachments, radiating in ail directions. There 

 are four stout oral spines, and also spines on the border of the zoœcium, usually five on 

 each side, and thèse are more délicate than the oral spines and acute at the ends. Sections 

 show 20 tentacles. 



From examination of the British Muséum spécimen of B. inermis Bush, it would seem 

 that the spécimen is in an unsatisfactory and worn condition, but the relationship between 

 the two species is undoubtedly very close. 



Jullien mentions B. inermis B. as well as B. Hyadesi }. from Cape Horn. The B. inermis 

 B. of the Challenger may be B. Hyadesi. 



Habitat. — ■ Baie Orange (Jullien), « sur les frondes de Macrocystis pyrifera ». 



Exp. Antarct. Belge. 



N° 1068. Straits of Magellan. Sur la carapace à'Eurypodius Latreilli. 



Beania erecta sp. nov. 



(PI. I, figs 8<i-e) 



Besicles a spécimen from 1012, in which the chief characters can be deciphered, there 

 is a small imperfect one from 343. 



The zoœcia are erect, as in B. crotali Bush, B. hirtissnna, var. conferta MacG., and 

 B. fragilis Ridley, in ail of which the connections occur at the base of the zoœcium and the 

 radicle also grows from the lower part. The oral aperture is large, and on each side, above 

 the aperture, there is a rudimentary spine. On the side of the zoœcium a large capitate 

 avicularium is articulated, having a much prolonged mandible, and the mandibles hâve the 

 double columella characteristic of B. magellanica B., and B. bilaminata Hincks, while the avicu- 

 larium is broader than that of B. magellanica Busk. 



The shape of the appendage of B. crotali B. in a spécimen from Port Phillip Heads 

 is exactly similar to the mandible of B. erecta, even to the contraction at the distal end, where 

 the narrow mandible terminâtes, and it seems probable that B. crotali B. is degenerate 

 B. erecta, having the appendages without mandibles. Upon putting a zoœcium from spirit to 

 water it quickly became much inflated, and the latéral walls between the attachment of 



