BULLETIN 5!», UNITED STATES NATIONAL MUSEUM. 59 



N., 7^ 16' W.. deptli 804 fiitlioins, teuiperrttiire r)3.3 F.: C}i(tlh:iui,r H\pc<liti<)ii 

 (Moseley); off Ki Islands, 12y fathoms (/•'. yM^-^.v Moselcy); off Twofold Bay. New 

 South Wales, 120 fathoms {F. australe Moseley): Sihoga Expodition (Alcock); 7" 15' 

 S., 115° 15.'6 E., 2Sft meters, 2 specimen^: and 5 2s. '4 S.. 1:^2- o'.2 E., 204 meters, 

 1 specimen (as /". anstrnh). 



Albatross, 1902: 



Vicinity of Kauai Island, Station Sit'.t'.t; depth 7-1 Is fathoms: l)ottom, coral sand, 

 shells; 1 specimen. 



Pailolo channel, between Maui and Molokai islands. Station 4lni: depth 122-143 

 fathoms: bottom, coral sand, shells, foraminifei-a: 2 specimens. 



FLABELLUM PAVONINUM var. PARIPAVONINUM Alcock. 



I'late 111, tig.s. 1, L', -A, 4, 4.i, 4/.. 



1894. Flfiliellum parljKtiQninum Xlcock, Jour. As. Soc. Bengal, LXIII, \>. IS". 

 1898. Flabellwn pciripavoninnm Alcock, Investigator Deep Sea Madrepor., p. 21, pi. ii, figs. 

 3, 3'(, .%. 



Desct'ijyiion. — According to Alcock: 



Corallum compressed, fan shaped, with a ses!^ile .siar (it" attachment, but no pedicle, and with the 

 two faces somewhat concave. The lateral costa- arc sharp, but not .salient; they meet the ba.^al .«car 

 at an angle of about 4.5°; the other costje are merely sinuous striation.s. The margin of the calicle is 

 almost entire, and forms a segment of a i-ircle of about 230°, so that when the corallum is held straight 

 in front of the eyes, with the major axis end on, and without any inclination, the columella, such as it 

 is, is plainly visible above that plane of the calicular margin. The septa are in si.i: cycles, the last 

 cycle not quite complete; they are all extremely thin, and have the free edges sharp and straight 

 (not sinuous) and the granular stria; of the surface inconspicuous Those of the first three cycles are 

 almost equal and meet together at the bottom of the calicle to form a .sort of columella by their 

 slightly thickened ends. Those of the fourth cycle are not so very much smaller than their prede- 

 cessors, but do not meet them. Those of the last two are small. * * » 



Height of corallum. 39 mm. ; major axis of calicular orifice, 37.5; minor axis, owing to the eversion 

 of the rim of the calicle, .30..T ram.— Alcock, 1898. 



The anf;le of divergence of the lateral edges, luea.sured in the figure, is al)Oiit 

 110^; plane of shorter diameter of calice above tliat of the longer, 2'.t mm., this al.-^o 

 mea,sured on the figure. 



The absence of th(; pedicel in Alcock's type, I am confident, is an accident; the 

 figure looks as if the base of the specimen had been broken, therefore no importance 

 attaches to this character. The angle between the lateral ^edgcs indicates var. dis- 

 tinctum, and the septa arc the same as in tiie type of that form. The chief peculiar- 

 ity of Alcock's form is the height exceeding the greater diameter of the calice, wiiile 

 the plane of the longer diameter of the calice is not nmch below the middle point in 

 the altitude of the coralhan — the arch of the calicular margin is decidedly high. 



Eighty-tive of the Alhatross, 1902, specimens are referred to this variety. 

 As their intergi'adation with typical pavoiiinum has been discussed at the end of the 

 remarks on that form of the species (see p. 54), attention can be turned directly to 

 their relations to Alcock's type specimen. In form there is no diti'erence; the type 

 was somewhat over 39 nnn. in height, as the base is now broken. The munber of 

 the septa is the same, but there are more principal septa in the Hawaiian specimens 

 than in the tjpe. The principals over 24 are often, nearly always in part at 



