42 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Distribution. — This species occurred in considerable numbers from 

 several stations as follows: Albatross station D5236, in 494 fathoms 

 (903 meters) east coast of Mindanao; D5460, in 565 fathoms (1,074 

 meters), east coast of Luzon; D5468 in 569 fathoms (1,081 meters), 

 east coast of Luzon; D5567, in 268 fathoms (490 meters), north of 

 Tawi Tawi, bottom temperature 52° F. (11.1° C); D5580, in 162 

 fathoms (297 meters), off Darvel Bay, Borneo, bottom temperature 

 55.8° F. (13.2° C); D5585, in 476 fathoms (870 meters), Sibuko Bay, 

 Borneo, bottom temperature 41.1° F. (5° C); D5591, in 260 fathoms 

 (476 meters), same locality; D5619,in 435 fathoms (796 meters), in 

 Molucca Passage; D5622, in 275 fathoms (503 meters), between 

 Gillolo and Makyan Islands; D5625, in 230 fathoms (421 meters), 

 between Gillolo and Kayoa Islands, and D5668, in 901 fathoms (1,648 

 meters), in Flores Sea. 



The specimens of the deeper, colder waters are larger and better 

 developed than those in the shallower, warmer waters. Practically 

 all the stations are in the deeper waters outside the protected waters 

 of the Archipelago proper. 



The texture of the wall is very different in appearance in this 

 species from any of the others in the region. 



Bathysiphon Jiliformis — Material examined. 



Cat. 



No. 



Coll. of- 



Locality. 



Depth 



in 

 fath- 

 oms. 



Bot- 

 tom 

 tem- 

 pera- 

 ture. 



Character of 

 bottom. 



Abundance. 



13404 

 13415 

 13958 

 13955 

 13960 

 13961 

 13962 

 13963 

 13964 

 13965 

 5» 

 13966 

 13%7 



U.S.N.M. 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



U.S.N.M. 

 U.S.N.M.i 



8 50 45 N. 



13 32 30 N. 

 13 35 39 N. 



5 48 00 N. 



4 52 45 N. 



4 07 00 N. 



4 11 48 N. 



35 00 N. 

 Makyan Id. 

 W. 



07 00 N.; 



2 28 15 S.; 



126 26 52 E . 



123 58 06 E . 

 123 40 28 B. 

 120 33 45 E . 

 119 06 45 E. 

 118 49 54 E . 

 118 38 20 E. 



127 14 40 E. 

 (NE.); N.66'> 



; 127 28 00 E . 

 118 49 00 E. 



494 



565 

 569 

 268 

 162 

 476 

 260 

 435 

 275 



230 

 901 



' F. 

 41.2 



52.0 

 55.8 

 41.1 



fne. gy. s 



gy- m 



gn.m.(m.b.), 



fne. s 



br. s., Co . . . . 

 gy. m 



fne. gy.s.,m. 

 gy. m 



gy. m.,fne. s. 

 gy.m 



Common. 



Few. 

 Rare. 

 Rare. 

 Rare. 

 Rare. 

 Rare. 

 Rare. 

 Rare. 



Few. 

 Rare. 



BATHYSIPHON RUFUS de Folin. 



Plate 2, fig. 2. 

 Bathysiphon rufuni de Folin, Actea Soc. Linn. Bordeaux, vol. 40, 1886, p. 283, 

 pi. 6, figs. 8a-c.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 267, pi. 7.— 

 CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 32, fig. 22 (in text); Bull. 

 104, U. S. Nat. Mus., pt. 1, 1918, p. 29. 



Description. — Test elongate, somewhat curved, decidedly tapering 

 from the small initial end to the much larger last-developed portion; 

 surface smooth and polished, wall comparatively thick, with numer- 

 ous annular lines of growth and depressed areas, composed of sponge 

 spicules and a very hard siliceous cement; color reddish-brown. 



Length up to 10 mm.; diameter about 0.5 mm. in the widest part. 



