330 lAdK sKor.smonc 



The u |i |i I' r lip ;intl tlic rod -sli ;i |)(mI (irt^aii ;in' similar to tliosf of (he inalc 

 The lateral o y i* s »n"t*, like those of tlio lyju' species, situated soiuewliat in Jiont 



of the middle of the shell and somewhat above half the height of the latter. They arc rather 



smaller than those of the male. 



7. (C.) lepidophora Remarks: — I regard C. (C.) lepidophora ((J. W. i\li'l,l.i;ii) as t h c f r m a 1 c o f 



= C. fC.) serraia. ?. ^, ^.^,,.^,,^y l^. y^y Mt'i.LKH). — Descriptions of these two forms are to be found in d. W. MiJLl.liit's 

 work 190(3 b, pp. 20 and '21. 



This author has the following remark a!)out the latter species (p. 22): j.W'Jihicnd wir sonst 

 die J in iler C^berzahl finden oiler die V ganz fi'lilcii. vermissen wir hier die J- Unigekehrt ver- 

 missen wir bei P. serrata die V. iind da sich heidc Formen in Stat. 99 und 140 in grolierer Anzahl 

 nebeneinauder fanden, liegt der A'erdacht nahe, dalJ sie als die Geschlecliter einei' Art zusaniiucn- 

 gehoren. Immerhin unterscheiden sich beide Formen in so zahlreichen Merkmalen, auf welche 

 sich sonst die secundiircn Geschlechtsmerkmale nicht zu erstrecken pflegen, daB ich mich nicht 

 habe entschlieBen konnen, beide in einer Art zu vereinigen, doch wircl man bei weiteren Fiingen 

 die Frage der Zusammengehorigkeit ini Auge behalten miisseu." 



The fact that in an additional case these two forms — or rather a variety of these two 



forms — were caught together — there were no other species at all of this sub-genus in this 



sample — as well as the rather great morphological resemblance has convinced me that it is 



most in accordance with the facts of the case to connect the two forms in question as males 



and females of the same species. 



yame. As in G. W. Mt'LLER's Work mentioned above C. (C.) serrata is placed before C. (C.) 



lepidophara, the former name must obviously be retained according to the rules of nomenclature. 



.1 mistake made by In describing the posterior part of the shell, as seen from inside, in ('. (C.) serrata 



'■ ■ " /'^r''rr'\ ^' ^^ • Mtj'LLEK has obviously confused the right and the left valve owing to a mistake, a fact 



serrata. that has apparently increased the amoimt of difference between this form and C. lepidophora; 



the same mistake is repeated in his work of 1912. That there is a mistake is shown by the 



accompanying figures in G. W. Miller's work, which show that C. (C.) serrata and C. (C.) 



lepidophora, like the males and females of the form described by me above, agree in this character. 



The variety The variety described above closely resembles the type species and it does not seem 



impossible to me that in the future we may find that it must be united with this. As a preliminary, 



however, it has seemed to me necessary to distinguish it as a separate form. With regard to 



the differences that exist I need only refer to the description and figures. A number of the 



differences may possibly be explained as the results of lack of accuracy and care on the part 



of G. \\. MULLER. 



Habitat: — Australia: 



Gape Jaubert, N. W. Australia (type locality); at the surface of the sea; 

 2. VI. 1911 (coll. E. Mjoberg): four mature males and five mature females; R. M. 8. 



identical with the 

 type species? 



