136 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.6 



Distribution. — Off Albemarle Island, Galapagos, in 250 fms. ; off 

 Chatham Island, Galapagos, in 400 fms. This species was also found in a 

 bottom sample taken at low tide in the harbor at Manila. 



Textularia orbica Lalicker and McCulloch, new species 



Plate 15, Figs. \7a, b, c 



Textularia trochus H. B. Brady (not d'Orbigny), Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 366, pi. 43, figs. 15-19 (part). 



Test small, triangular in front view, nearly circular in top view, early 

 portion of test somewhat compressed, later portion broadly rounded; 

 chambers numerous, low and broad, apertural chambers flattened, early 

 chambers somewhat overlapped by later ones ; sutures distinct, slightly de- 

 pressed, nearly straight and horizontal ; wall rather smooth, composed of 

 very fine sand grains cemented with calcareous cement; aperture a low, 

 broad opening at the base of the inner margin of the last-formed chamber 

 in a slight re-entrant, and a faint lip on some specimens. Length of holo- 

 type, 0.35 mm.; maximum width, 0.49 mm.; maximum thickness, 0.36 

 mm. 



Holotype (AHF no. 26) from Hancock Expedition Station 412, lati- 

 tude 0° 59' 15'' S., longitude 90° 20' 30" W., Galapagos Islands, depth 

 111 fms. 



This species has been noted also at Hancock Expedition stations 414, 

 419, 478, and 481. It is abundant at the type locality, but is quite rare at 

 the other stations. This is apparently the same species that H. B. Brady 

 identified as Textularia trochus d'Orbigny, from the Admiralty Islands 

 and New Guinea. T. trochus d'Orbigny has been definitely assigned to 

 the genus Marssonella. 



Distribution. — Off Tower Island, Darwin Bay, in 17 fms.; off 

 Chatham Island, Wreck Bay, in 26 fms. ; off Albemarle Island, Cartago 

 Bay, in 12 fms.; off Bindloe Island, Galapagos, in 56 fms. 



Textularia panamensis Cushman 

 Plate 15, Figs. \%a, b, c, d, e 



Textularia panamensis Cushman, U. S. Nat. Mus. Bull. 103, 1918, 

 p. 53, pi. 20, figs. \a, b. 



Textularia espersoni Applin, Bull. Amer. Assoc. Pet. Geol., vol. 9, 

 no. 1, 1925, p. 97, pi. 3, fig. 2. 



