138 RECENT MADRKI'OKAKIA OF THE HAWAIIAN ISLANDS AND LAYSAN. 



the circiiliir .-alices is Iroiii 1.5 to 2.5 iiiiii. Tlic (•lli])tical ones may have a ^rroater 

 diameter of 4.5 mm. and a lesser of alxmt :'. mm. There are no collines. 



The nnder side of the eoraihim is tinely striate, the striie delicately granulated, 

 equal or slightly alternating in size. The se])to-costa> of the upper side are tine, 

 delieatelv granidated. straight or slightly fle.xuous, ecpial or .slightly alternating in 

 size. Rather freipiently on the proximal side of a calice they may l)e irregularly 

 zigzag. The faces of the septo-costse show no perforations. 



The number of the septa to a calice varies from 14 to :i(). the calices near the 

 center usually having fewer than those near the periphery. There is no definite 

 C3'clical arrangement, hut sometimes there is a fairly regular alternation of larger 

 and smaller, with occasional rudimentary septa. The septa around the outer edge 

 of the calice are thick(>r than the septo-costa\ Their inner edges are thinner. All 

 septa imperforate, ap])arently the inner portions of the margins entire: faces 

 minutely granulate. 



There an* occasional dissepiments in the basal portion of the corallum: synapti- 

 cula abundant. Caliiular fossa narrow, moderately deep. Colunudia usually well 

 develop(Hl, solid. coni|)osed of one or two papilhv. 



LoVlll it K S. 



On the south coast of ]\Iolokai Island: 



Station o.S2;5; depth. 7.S-222 fathoms: bottom, tine sand and pelibles; temperature, 

 6y.0° F. ; 2 good sp(>cimens. 



Station 8S45: (h>i)th. ()()-(i4 fathoms; bottom, coarse sand, pebbles, shells: temper- 

 atui'e, 71^ to 71.5 F. ; 4 specimens, including the largest one found. 



Station 384S; depth 44-7;-! fathoms; bottom, sand, gravel; 7 specimens, very good 

 ones. 



Station 3849; depth 43-73 fathoms; bottom, coarse sand, broken shells, coral; 

 .several \-ery good specimens. The margins of the coral la loljed, the lobes much 

 contorted. 



Vicinity of Kauai Island: 



Station 4<(24; dej)th 24 43 fathoms; ))ottom, coarse coral sand, foraminifera; tem- 

 perature, 73.7" F. ; 2 small specimens. 



Station 4128; depth, 68-253 fathoms; bottom, coarse broken coral sand, foi'ami- 

 nifera: temperature, 47..S- F. ; 3 young or very small specimens. 



Station 4132; depth, 257-312 fathoms; bottom, tine gray sand, mud; temperature, 

 4:6.8 ' F. ; 1 young or stunted specimen. 



Northeast coast of Hawaii Island: 



Station 4053; dei)th. 2<)-2!t fathoms; bottom, tine gray sand; several fairly good 

 specimens. 



Station 4ii54; depth. 26-50 fathoms; bottom, coarse coral sand, corallines; several 

 good specimens. 



Station 4055; depth, 50-62 fathoms; bottom, line gray sand, foraminifera; speci- 

 mens much broken, but originally wen^ large. 



)*ailolo Channel. ))etwcen Maui <aiu Molokai Islands: 



Station 4100; depth, 130- L5rfathoms; bottom coral sand, sh(dls, foraminifera; 

 temperature, 61.0^ F.; 1 small specimen. 



