472 Mr. E. T. Browne on the Medusce 



Staurophora laciniata, L. Agassiz, 1849. 



Staurnphora laciniata, L. Agassiz, 1849, p. 300, pi. vii. ; A. Agassiz, 

 1865, p. 136, figs. 215-219 ; Wagner, 1885, p. 80, Taf. iv. ; Fewkes, 

 1886, p. 958 : Fewkes, 1888, p. 233 ; Hartlaub, 1897, p. 484, Taf. xvi. c, 

 Taf. xxii. ; Broch, 1905, p. 7. 



Staiirostoma laciniata, Hseckel, 1879, p. 130 ; Hargitt, 1905, p. 43. 



Stauropliora Keithii, Peach, 1867, p. 358, pi. ii. 



Thuumantias melanops, M'Intosli, 1890, p. 40, pi. viii. ; Hartlaub, 1904, 

 p. 103. 



This species has tlie mouth extending along tlie whole 

 leno-th of the stomach, and the tentacles form alternating 

 series of large and small ones, but the difference in size is 

 very slight. Both this species and ^S'. arctica require further 

 examination, and careful drawings sliould be made of the 

 organs on the margin of the umbrella, especially of tlie 

 tentacles. It is not yet definitely proved that the latter is a 

 distinct species. 



Peach states that his specimens agreed in every detail 

 with L. Acrassiz's description of ^S*. laciniata^ except that the 

 four rays of the stomach meet to form a perfect cross, whereas 

 Agassiz figures an imperfect cross. This slight difference is 

 not a specific character, though Peach attached great import- 

 ance to it. 



M'Intosh described under the name of Thaumantias 

 7nelanops an abnormal Hydromedusa without stomach or 

 mouth. Hartlaub (1904) has examined M'Intosh's specimen, 

 and states that it is a typical S. laciniata. 



Hartlaub (1897) records the capture of a large specimen 

 at Heligoland, but he is a little uncertain whether it belongs 

 to S. arctica or ;S^. laciniata. He also obtained some very 

 early stages, about 2 mm. in diameter, and kept them alive 

 for several weeks in an aquarium. They fed on copepods 

 and grew at a great rate. It was whilst watching the 

 development of these young stages that Hartlaub saw cordyli 

 develop direct into tentacles. The figures of these young 

 stages do not show cordyli, but only tentacular buds. 



iJistrihution. Arctic Ocean ; ^\\n\Q ^Qi\ {Wagner). North 

 Atlantic; America, Boston Harbour {L. Agassiz) ; Nahant 

 {A . Agassiz) ; Woods Holl (Hargitt) . Lat. 38° N., long. 68° 

 W. [Fewkes) . Bay of Fundy ; Grand Manan Is. and Frye's Is. 

 (Feu/'/.-es, 1888). Europe; Norway (5wcA). Scotland, east 

 coast [Peach, M'Intosh). Heligoland [Hartlaub). 



Staurophora falklanclica, sp. n. 

 This new species was taken by the Scottish Antarctic 



