1Z4 PERCY SLADEN TRUST EXPEDITION 



1. EUPHYSORA BIGELOWI, Maas, 1905. 



Euphysora bigelowi, Mass, 1905, p. 7, Taf. 1, figs. 1 — 3. 



Euphysora bigelowi, Maas, 1906, p. 84, pi. 2, figs. 1 — 2. 



Euphysora bigelowi, Miiller, 1908, p. 59. 



Sleenstrupia bigelowi, Mayer, 1910, vol. i, p. 36, fig. 9. 



Euphysora bigelowi, VauhoflFen, 1911, p. 197. 



Euphysora bigelowi, Vanhbflfen, 1912, p. 7, Taf. 1, fig. 3. 



Localities. Cargados Carajos, Surface. 30 Aug. 1905, i. 2 specimens. Alphonse 

 Is., Surface (Temp. 80° F.). 7 Oct. 1905, dd.* 1 specimen. 



The specimens in the " Sealark" collection belong to the species Euphysora bigelowi, 

 and only a brief description of them is necessary as the species has been fully described 

 and well figured by Maas. The smallest specimen is about I'S mm. in length, and has 

 seven globular clusters of nematocysts upon the principal tentacle. The next in size is 

 about 3 mm. in length, and the principal tentacle is also provided with seven batteries of 

 nematocysts. Neither of these specimens shows gonads. The largest specimen is about 

 4 mm. in length and 2 mm. in width, and has a well-developed spermary which surrounds 

 the stomach and extends along its whole length, just leaving the circular mouth free. 

 Upon the principal tentacle there are eleven globular clusters of nematocysts forming 

 a half loop round the tentacle. The three other marginal tentacles are quite different in 

 shape and appearance. They taper to a point and have a smooth external surface, the 

 nematocysts being scattered. In the largest specimen the tentacle opposite to the 

 principal tentacle is much shorter than the others, but in the smaller specimens the three 

 tentacles are about equal in size. None of the specimens show the apical prolongation of 

 the stomach in the shape of a canal, which was present in many of the medusae seen by Maas. 



Distribution. Indian Ocean ; Pacific Ocean, Malay Area. 



2. Steenstrupia normani nova species. 



(Plate 39, fig. 1.) 



Locality. North of Chagos, Lat. 4° 16' S., Long. 71° 53' E. 100—0 fms. 17 May, 

 1905, B. I specimen. 



Description of the Species : — Umbrella about twice as high as broad, with a conical 

 apex, and thin walls. Ex-umbrella with twelve longitudinal streaks of nematocysts 

 extending from the margin to the apex, having lateral branches and forming a kind of 

 network on the lower part of the umbrella. Stomach large, cylindrical, with a tube-like 

 mouth extending beyond the velum, and with an endodermal cellular prolongation into 

 the apex of the umbrella. Four thick radial canals and a very thick circular canal. 

 One perradial tentacle, with a long, hollow, sac-like basal bulb, and terminating with a 

 large globular ball containing nematocysts, and also three other globular clusters of 

 nematocysts probably unilaterally arranged. Three small perradial bulbs without 

 tentacles on the margin of the umbrella. 



Size. Umbrella 1"25 mm. in width and 2*5 mm. in height. 



The specimen is in very good condition, but a few more showing later stages would 



* Por List of stations see Trans. Linn. Soc. Ser. 2. Zool. xii. (1907), p. 170. 



