362 Records of the S.A. Museum 



are not nearly so large as the females. The striking sexual dimorphism exhibited 

 is a remarkable feature, but will possibly prove to be a generic rather than a 

 specific character. 



The species will l)e more fully described and mentioned in the forthcoming 

 re]:)ort to which allusion has already been made. 



CONCLUSION. 



From the foregoing notes it apjjcars that instead of being i>racticall\- mono- 

 specific genera as some authors have seemed tempted to consider them, both 

 SepiailiiriiiJii and Idioscpius contain a number of fairly well marked geographical 

 races, which, until the existence of actual intergrades be proven, are best con- 

 sidered as distinct species. lioth these genera are now seen to have an extended 

 distribution in Indo-Pacific waters, and it is possible that both will prove fairly 

 rich in species as collections are made over a more extended area of this region. 



The scanty evidence available indicates that Sepioloidea is both a more 

 compact and a more localized genus, the distribution of which through the whole 

 of the region occupied by the other two genera is not to be expected, 



BIBLIOGRAPHY. 



Appellof, A. 



1898. Cephalopoden von Ternate. 1. X'erzeichnis der von Professor Kuken- 

 thal gesamnielten Arten. 2. Ihitersuchungen iiber Idiosepius, Sepiadanuin 

 und vervvandte Former, ein Beitrag zur Beleuchtung der Hektocotulization 

 und ihrer systematischen Bedeutung. Ergebnisse einer zoologischen 



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Kiikenthal, etc., Zweiter Tail: W'issenschaftliche Keiseergebnisse. ii, p. 5()1- 

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Berry. S, S, 



1912, A catalogue of Japanese Cephalopoda, Proceedings Academy Natural 

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Brazier, J. 



1892, Catalogue of the marine shells of Australia and Tasmania, Pan I, 

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Brock. J. 



1884. Das Mannchen der Sepioloiden lineolata d'Orb. (Scpiohi liiicoUtta 

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1XS7. Indische Cephalopoden. Zoologische Jahrbiicher, Syst.. ii, yi. ^^\MA, 

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