FurtJicr Notes on Australian Hydroids. 99 



laria (Laomedea) Torresii difters from C. insignis in precisely 

 these particulars, there is every probability that Busk was 

 speaking of the latter species under the name of L. antipathes ; 

 it is very doubtful, however, whether it was really the same as 

 that described by Lamouroux ; indeed, if the figure given by the 

 latter be at all correct, it cannot be intended for the species 

 mentioned by Busk. 



Thyroscyphus simplex, Allnian. 



The species described under the above name in the Challenger 

 Report is identical with Canipanularia Torresii^ Busk, {^Laomedea 

 Torresii of the " Voyage of the Rattlesnake "). Both Busk's and 

 Allman's types came from Torres Strait, and appear to have been 

 wholly alike, except that the latter was a rather larger specimen, 



Obelia geniculata, Lin. 



A dwarf variety, about one-fourth of an inch in height, and 

 with all its parts small in proportion. The thickenings of the 

 stem-internodes, which give the species its characteristic appear- 

 ance, are, especially towards the bases of the shoots, even more 

 strongly developed than in the larger forms. 



The Monosklera pusilla of von Lendenfeld appears to be iden- 

 tical with this variety, so far as can be judged from a comparison 

 with some of the type specimens, from which, however, the 

 hydrothecje have fallen off. 



Port Phillip Bay (Mr. J. B. Wilson). 



Halecium gracile. Bale. 



Port Phillip Bay (Mr. J. B. Wilson). 



The female gonothecae when mature have the summit notched 

 like those of H. parvuluni* and do not differ greatly from them 

 in other respects ; it would appear, therefore, that the differences 

 which I have shown as existing between them may depend 

 largely on their state of development. The male gonothecte are 

 considerably longer than those of my foi'mer specimens, which 

 were evidently immature. 



* Proceedings of the Liuiiean Society of New South Wales, 1888, p. 759. 



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