60 



MEDUS.E OF THE WORLD. 



Gronberg found this species at Spitzbergen in summer, and he also identified it among 

 a collection of medusae from Jakobshavn, Greenland, where it appears to be rarer than at 

 Spitzbergen. 



Sarsia angulata Hartlaub. 

 Plate 5, fig. i; plate 6, fig. 3. 



Syndictyon angulatum, MAYER, 1900, Bull. Mus. Comp. Zool. at Harvard College., vol. 37, p. 5, figs. 6-8, plate 3; 1904, 



Memoirs Nat. Sci. Brooklyn Institute Museum, vol. I, No. I, p. 7, plate I, fig. 6. 

 N on Syriilict\on tiHgtihitum, MURBACH and SHEARER, 1903, Proc. Zool. Soc. London, vol. 2, p. 168. 

 Sarsia angulata, HARTLAUB, 1907, Nordisches Plankton, Nr. 12, p. 16. 



Bell i mm. high; half-egg-shaped, with moderately thick walls. Becomes almost square 

 in cross-section when contracted. There are 4 slender tentacles with fairly thick spindle- 

 shaped ends. These tentacles are each about as long as bell-height and their distal halves are 

 tapering and are armed with nematocysts. The basal bulbs of the tentacles are not very large, 

 and each one bears an ocellus formed by a cup-like invagmation of ectodermal cells. The velum 

 is large, and the radial-canals and circular vessel are of fine caliber. The manubrium is 

 spindle-shaped with a narrow tubular o?sophagus and without an aboral projection. It is 

 about two-thirds as long as the height of the bell-cavity. The gonad encircles it, extending 

 from the base to near the mouth, leaving the throat-tube free. The entoderm of the tentacle- 

 bulbs and manubrium is robin-egg blue, while the ocelli are deep-brown, almost black. All 



other parts are hyaline. This medusa is abundant 

 in the Tongue of the Ocean, Bahama Islands, in June 

 and July, and was found at Turks Island in January. 

 It is rare at Tortugas, Florida. 



Sarsia gracilis Browne. 



Sarsia gracilis, BROWNE, 1902, Annals Mag. Nat. Hist., ser. 7, vol. 9, p. 275. 

 (? ?) S\ncoryne sarsii (hydroid), HARTLAUB, 1905, Zoolog. Jahrbiichern, 

 Suppl. 6, p. 525, fig. F. 



Bell 5 mm. high, 3 mm. wide; cylindrical, with 

 moderately thick walls and quadrangular margin. 

 4 tentacles, about as long as the bell-height, and end- 

 ing each in a large knob containing nematocysts. An 

 ocellus on the basal bulb of each tentacle. Manu- 

 brium about two-thirds as long as the depth of the 

 umbrella cavity. Color ( ?) Gonads ( ?) Found at 

 Stanley Harbor, Falkland Islands, by Vallentin, and 

 briefly described without figures by Browne. The 

 hydroid, Syncoryne sarsn, described by Hartlaub from 

 southern Terra del Fuego, may be the stock ot this 

 medusa. 



The medusa may be a young Slabberia ( ?) 



Sarsia princeps Haeckel. 



Codonium princeps, HAECKEL, 1879, Syst.derMedusen,p.l3,taf.l,figs. 1,2. 



Sarsia princtps, HAECKEL, 1879, Ibid., p. 655. LINKO, 1905, Zool. An- 

 zeiger, Bd. 28, p. 212. BROWNE, i9O3,Bergens Museums Aarbog, 

 No. 4, p. 8, plate i, fig. i; plate 3, fig. 4. HARTLAUB, 1907, Nor- 

 disches Plankton, Nr. 12, p. 47, fig. 44. 



Codonium princeps, LEVINSEN, 1893, Vid. Meddel. Nat. For. Kjobenhavn 

 (5), Bd. 4, p. 143. GRONBERG, 1898, Zoolog. Jahrb., Abth. Syst., 

 Bd. n, p. 458, taf. zj, figs, i, 2. 



Bell thin-walled and conical, about 25 to 40 mm. 

 high, and 15 mm. wide. There is a short, conical, 

 apical projection. There are 4 tentacles with long 

 conical basal bulbs. The shafts of these tentacles 



1-iG. 22. barsia princeps, alter Hartlaub, in 



Nordisches Plankton. are very contractile, three or four times as long as 



