472 Mr. E. T. Browne on the Medusce 



Staurophora laciniata^ L. Agassiz, 1849. 



Staurophora 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. 



Staurostoma laciniata, Hfeckel, 1879, p. 130 ; Hargitt, 1905, p. 43. 



Staurophoi'a Keithii, Peach, 1867, p. 358, pi. ii. 



Thaiimantias melanops, M'lntosli, 1890, p. 40, pi. viii. ; Hartlaub, 1904, 

 p. 103. 



This species has tlie mouth extending along the whole 

 length 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 should be made of the 

 organs on the margin of the umbrella, especially of the 

 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. Agassiz'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'lntosh described under the name of Thaumant'tas 

 melanops an abnormal Hydromedusa without stomach or 

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

 and states that it is a typical 8. 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 8. 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. 



Distribution. Arctic Ocean ; White Sea (TFa^wer). North 

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

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

 W. {Feiches) . Bay of Fundy ; Grand Manan Is. and Frye's Is. 

 (i^ew'/jcs, 1888). Europe; Norway (iJ/'oc/*). Scotland, east 

 coast {Peachy Mcintosh). Heligoland {Hartlaub). 



Staurophora falkland'ica, sp. n. 

 This new species was taken by the Scottish Antarctic 



