THE SESSILE BAENACLES. 



217 



Type. — British museum. 



Distribution.— Q\\\\v\ Sea and Philippine Archipelago, in deep 

 water. 



This species was originally taken by the Cludlenger in the China 

 Sea west of ISIindoro, and again by the Sihoga in the Suln Sea east 

 of northern Borneo. Its range is considerably extended by the 

 Albatross collections, recorded below. It is a trulj'^ deep-water 

 species, all of the records being between 100 and 244 fathoms. 

 Though described from quite young and small examples, it attains 

 a considerable size, up to 35 mm. in rostrocarinal diameter, with a 

 height of 50 mm. In some places it is evidently abundant. 



U.S. N.M. 

 No. 



Station. 



Locality. 



Collector. 



D. 5325 

 D.5294 

 D. 5265 

 D.5290 

 D. 5298 

 D. 5289 

 D. 5520 

 D. 5551 



Near Hermanos Islands, oil Northern Luzon. . 

 ChinaSea, near Escarceo Light, southern Luzon 

 China Sea, near Malocot Point, southern Luzon 



do 



do 



do 



Near Point Tagolo, northern Mindanao 

 Oil Jolo Island , near Jolo Light 



A Ibalross. 

 Do. 

 Do. 

 Do. 

 Do, 

 Do. 

 Do. 

 Do. 



BALANUS AMARYLLIS Darwin. 



1854. Balamis amarijlUs Dakwin, Monograph, p. 279, pi. 7, figs 6cr-6c. 

 1902. Balaniis omanjUis (lisshiiiJis Lanchester, Proc. Zool. Soc, p. 369, 



with var. clarovittata (p. 370). 

 1905. Bahtmis amaryUis Darwin, Griwel, IMonographie des Cirrhipedes, ]>. 



250, with var. roseiis and nwens. 

 1913. Balanus amaryUis Darwin, Hoek, Sihoga Exped., Cirripedia. Monogr. 



31?J, p. 179, pi. 15, figs. 17-21 ; pi. 16, figs. 1-4. 



Type. — British JMuseum. 



Distribution. — Southern Japan and India to northern Australia, 

 shoi-e to over 100 fathoms. 



This species has an unusually great range in depth. Tlie colored 

 form with cirri of characteristic short segments bearing two pairs 

 of large spines in the sixth cirrus is certainly found living from low 

 tide to over 100 fathoms {Albatross station 4935), probably to 150 

 fathoms; but the specimens from stations 5313, 5398, and from the 

 Verde Island Passage came up dead and empty, and may have floated 

 or drifted into deep watei:, especially those from the last locality, 

 which were seated upon bark. 



B. amaryUis is quite variable, as Darwin recognized. This would 

 be expected in a common form which has a wide geographic and 

 bathymetric range. It appears to me possible that the forms de- 

 scribed by Dr. Hoek as 7j. bimrr and B. maculafus are varieties or sub- 

 species of B. amaryUis. since their small differences in various de- 

 tails are such as one finds variable in all of the well-known species. 



