THE MEDUSAE OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 251 



Vanhopfkn, E., 1888, " Untersuchungen uber semaeostome und rhizostome Medusen," Bibliotheca Zoologica, 



Heft iii., 54 pp., 6 Tafn. 

 „ 1902, "Die acraspeden Medusen der deutschen TiefseeExpedition 1898-1899," Wissensch. 



Ergebnisse ..." Valdivia," Bd. iii., pp. 1-52, Taf. i.-viii. 

 ,, 1906, "Acraspede Medusen," Nordischen Plankton, part xi., pp. 40-64, 37 text figures. 



Verrill, A. E., 1869, "Description of a Remarkable new Jelly-fish and two Actinians from the Coast of 



Maine," Amer. Journ. Set., 1869, pp. 116-118. Reprinted in Ann. Mag. Nat. 

 Hist., ser. 4, vol. iv., p. 161. 



EXPLANATION OF PLATES. 



Plate I. 



Staurophora falklandica, n. sp. 

 Fig. 1. Oral view. Natural size. 

 Fig. 2. Cordylus partly contracted. x 140. 

 Fig. 3. Cordylus expanded. x 140. 



Fig. 4. Margin of the umbrella, showing the tentacles and cordyli. Inner side, x 25. cc, circular 

 canal ; oc, ocellus ; sc, cordylus ; T 2 ., rudimentary tentacle ; v., velum. 



Fig. 5. Inner side of the wall of the stomach with gonads. x 10. g., gonads ; m., margin of the mouth. 



Fig. 6. Lateral view of the base of a tentacle. x 25. 



Fig. 7. Basal bulb of a tentacle. Outer side. x 25. t.r., the spur or root of the tentacle. 



Fig. 8. Botrynema brucei, n. g., n. sp. Lateral view. The margin of the umbrella is curled inwards, x 2. 

 Fig. 9. Botrynema brucei. Diagram showing the position of the gonads. 



cc, circular canal; g, gonads; m., margin of mouth ; r., radial canal; st., stomach. 



Plate II. 



Fig. 1. Botrynema brucei. A sketch showing the arrangement of the tentacles on the margin of the 

 umbrella. The velum is omitted ; its position is below the tentacles. Aboral view. x 9. per., percanal 

 (perradial) radius; inter., intercanal radius; p.t., percanal tentacle. 



Fig. 2. Desmonema chierchiana, Vanhoffen. A portion of the sub-umbrella showing the arrangement 

 of the circular muscles, tentacles, sense-organs, and marginal lobes in a young stage, x 3. cm., circular muscles ; 

 occ, canal of the ocular lobe; ocl., ocular lobe; v., tentaculocyst (rhopalium) ; spt., septum dividing the 

 pouches of the stomach ; t.c, canal of the tentacular lobe ; t.l., tentacular lobe. 



Fig. 3. Phacellophora ornata (Verrill). A portion of the sub-umbrella showing the arrangement of 

 the radial canals, sense-organs, and tentacles. Natural size, cc, circular canal ; occ, canal of the ocular 

 lobe; ocl., ocular lobe; ?*., tentaculocyst; r.c, radial canals; s., stomach; t., tentacles (cut off at base); 

 t.c, canal of the tentacular lobe ; t.l., tentacular lobe. 



Fig. 4. Phacellophora ornata. Portion of a tentacle, showing the arrangement of the nematocysts. 

 e., endodermal canal; n., nematocysts. 



Addendum. 



On the sub-umbrella and on the gonads of the large Desmonema chierchiana many 

 amphipods were found. Mrs E. W. Sexton of Plymouth kindly undertook their 

 identification, and informs me that they are Hyperia gaudichaudi (H. Milne- 

 Edwards). Most of the specimens were immature, but adult males and females were 

 present. Hyperia gaudichaudi has been taken off the coast of Chile, and was present 

 in the Antarctic collections made by the Southern Cross and by the Discovery. 



