56 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



lines lengthwise and diagonally, one side usually flattened; aperture 

 elongated, typically with a long straight tooth occasionally inclined 

 to be bifid at the tip. 



Length, up to 1.5 mm. 



Distribution. — In general this species is abundant in shallow trop- 

 ical and subtropical waters, especially of coral reef regions. In the 

 North Pacific Brady records it from Honolulu coral reefs, Hawaiian 

 Islands, in 40 fathoms. In the material I have had it has occurred 

 about the Hawaiian Islands at numerous stations, about Guam, Gas- 

 par Straits, and Hongkong. 



It seems very possible that more than one species may be repre- 

 sented in the reticulate series of this genus. 



QU1NQUELOCULINA [?] SCHAUINSLANDI (Rhumbler). 



Plate 8, fig. 7, 8. 



Miliolina schauinslandi Rhumbler, Zool. Jahrb., Abteil. Syst., vol. 24, 1907, 

 p. 41, pi. 3, figs. 20, 21. 



Description. — Test with the early chambers quinqueloculine, later 

 ones very irregular, in one plane usually; aperture large without 

 teeth but with several, 3-5, or more irregular incurving somewhat 

 pointed projections from the apertural border; wall smooth or 

 variously wrinkled or roughened. 



Length, 0.3 to 1.5 mm. 



Distribution.— Rhumbler described this species from a few speci- 

 mens from shore sands of Laysan. The only specimens I have had 

 which seem identical are from Nero station 2039, in 24 fathoms, off 

 the Hawaiian Islands. 



Rhumbler compares the inwardly curving projections about the 

 aperture to those seen in Nevillina coronata. From the Hawaiian 

 specimen and those of Nevillina which I have seen the projections of 

 this species seem to be entirely a portion of the lip of the aperture, 

 while the ring of teeth of Nevillina, uniting as they do in the center, 

 seem morphologically different and the resemblance only a superficial 



one. 



Genus MASSILINA Schlumberger, 1893. 



Quinqueloculina (in part) d'Orbiqny, Ann. Sci. Nat., vol. 7, 1826, p. 303. 

 Massilina Schlumberger, Mem. Soc. Zool. France, 1893, p. 218 (type, M. secans 

 (d'Orbigny) ). 



Description. — Test composed of a globular proloculum followed by 

 a Gornuspira-like chamber, making a half coil, these in turn fol- 

 lowed by a series of quinqueloculine chambers, in the adult composed 

 of chambers arranged like Spiroloculina in a single plane, leaving the 

 center open and the chambers a half coil in length. 



This genus, which has already been described in some detail in the 

 early pages, is derived from Quinqueloculina. 



