124 THE NAUTILUS. 



he followed von Martens in considering it identical with P. cos- 

 tata Q. and G. , I do not think that the figure in any way sup- 

 ports his conclusion. As shown by his figure, tricostata is a 

 small, globose form with two visible carinas, the upper one 

 scarcely more than a strong angle, the peripheral one is well 

 developed, the third (and intermediate?) one, if it exists, is not 

 shown in the figure. 



Bavay associates with this as varieties two forms, one much 

 larger and the other about of the same size, both of which are 

 much more strongly carinated and have a funicular umbilicus 

 surrounded with a strong carina. Tricostata has no indication 

 of an umbilicus of this form and no umbilical carina. Bavay' B 

 varieties are certainly clearly distinct from costata and appar- 

 ently so from tricostata. 



Lesson's type came from Lac Sentani at Ase. 



So far as can be determined from Bavay' s figure tricostata is 

 apparently specifically distinct from costata and Quoy and 

 Gaimard's name should be used for the species described by 

 them. 



A HAWAIIAN FOEM OF TAPES PHILIPPINAKUM. 



BY WM. ALANSON BRYAN. 



From a reliable native fisherman I learn that this species of 

 clam was plentiful at a certain locality in the mud-flats at Ewa, 

 on Oahu, more than thirty years ago, but that it apparently 

 completely disappeared from that locality. The native name 

 ' ' Okupi ' was commonly used for the species then though 

 more recently the name " Mahamoi " is sometimes used to dis- 

 tinguish it from the more common edible " Olepi ' (Tellina 

 rugosa Born). 



The story given in accounting for the unusual nature name 

 " okupi," which means leg- weary, tired or exhausted, is that 4 ' a 

 Jong time ago a native chief with his family and attendants, 

 while spending a day at the seashore, accidentally discovered 

 this clam as they were wading in the soft oozie black mud, de- 

 posited in the estuary of the stream. None of them knew a 

 name for the clam; no one had ever seen it before; it was a new 



