600 THE AUSTRALIAN HYDROMKDUS^, 



II. SUB-FAMILY. CANNOTIN.E. 

 CANNOTID.E. Haeckel. 



Leptomedusae, without marginal vesicles, with branched Radial 

 Canals. 



Polyp colonies unknown. 



46. GENUS CANNOTA. Haeckel. 



Cannotina?, with four radial canals, from each of which two 

 branches originate, so that 12 terminations occur, on each of 

 which there is a Gonad. 



198. CANNOTA DODECANTHA. Haeckel. 



This species, which also occurs near the African coast has been 

 obtained from New Guinea, and described by Haeckel (2.) 



47. GENUS CLADOCANNA. Haeckel. 



Cannotinse, with six dichotomously branched radial canals. 

 These branch dichotomously repeatedly, the branches (about 48) 

 all extend to the ring-canal. Numerous gonads in the distal part 

 of the branch canals. 



199. CLADOCANNA THALASSINA. Haeckel. 



This species from northern Australia was described first by 

 Peron et Leseur (1), under the name Berenice thalassina. 

 Eschscholtz (2) and L. Agassiz (3) refer to it under the same 

 name. The Berenice euchroma of de Blainville (4), Milne 



( 1 ) E. Haeckel. System der Medusen. Seite 126. 



(2) E. Haeckel. System der Meduseu, Seite 151. 



(1) Per on et Leseur. Tableau des Aleduses, 1809, p. 327. 



(2) E*chxcholt%. System der Acalephen. Seite 120. 



(3) L. Agasniz. .Monograph of Acalephes. Coutrib. Natural Hist., 

 U.S.A., Vol. I V r ., p. 345. 



(4) De Blainville. Actinologie, p, 270. 



