224 



BULLETIN 93, UNITED STATES NATIONAL MUSEUM. 



B. hawaiensis is a species of the subgenus Solidohalanus^ nearest, 

 I believe, to B. au7'icoma Iloek, from Ternate. It differs from B. 

 auricoma in the following characters: The wall is strongly ribbed 

 externally. There are no hairs on the opercular plates. The articu- 

 lar ridge of the tergiim is much shorter, and the tergum is wider to- 

 ward the spur, which is shorter. The teeth of the labrum are more 

 separated. The outer maxilLie have a regularly oval shape. The 

 palpi have a row of long spines instead of a patch. The greatest 



Fig. 71. — Balanus hawaiensis. a, 5th segment op cirrus vi. ft, three terminal 



SEGMENTS OF INNER RAMUS OF CIRRUS VI. C, PALPUS. 



number of spines on cirrus vi is five pairs, without short hairs at 

 their bases. 



BALANUS TANTILLUS, new species. 

 Plate 48, figs. 2-2e. 



Type.— Cat No. 48202, U.S.N.M. 



Distribution. — Albatross station D5158, near Tocauhi Point, Tawi 

 Tawi group of the Sulu Archipelago, 49 fathoms. 



The barnacle is minute, oval, tapering slightly to the broad sum- 

 mit, between cartridge buff and white ; solid, the walls and base not 



