lU'LI.KTlX UK THK I'MTKU >T.\TK.S KISH COMMISSION. 



diHiiixniiii'. (ronangia curved, cornucopia-shaped, borne on slender pedicels at the liases of the 

 hydrothecii' and having one or two nem.'itophores on the basal portion. 



Itixti'iliiitinn. Found abundantly on the piles of the wharves at Woods Hole and Vineyard Haven. 

 Off <i;iy Head. S to 10 fathoms; Vineyard Sound, 8 fathoms. (Verrill.) 



verrill). A. Partof hvrtrooladmni (enlarged). 



71. Nr'/"'. l:'ii'fi:l in'">-ill:nt< iSfll'M. 



A. 1'iirt of hyilriirhuM'mii M-nhir.i;c(l .. 



7: 1 . AjUfnmtlaria fmtennfna iLinii.). 

 A. 1'jirl of hydrocliuliinu icnlargod). 



Schizotricha gracillima (Sarsl. l''i^. 71. l'/niiiii/ni-i<i n-n-iUii Clark. 

 ( lluiniilumi iii-iii-ilUnui Sill's. Biilmg til Kiunlskuli om Dvivlivrt pnii vr</ HiivliiiiikiT.) 



Trojilioxiiiiii'. Colony cdiisistinj; of a main stem, which j;ives off plumose branches near its base* 

 Branches consisting of a slender sliaft, giving off alternate rather distant hydrocladia, which are forked 

 and divided into rat her distinct interuodes which are Ions; and slender and separated by straight nodes. 

 Hydrotheni- small, cup-shaped, almost entirely adnate behind. A pair of trumpet-shaped netnatophores 

 are inserted just above the aperture of the hydrotheca, another single one below its base, and others 

 scattered rather irregularly along the hydrocladia and stem. 



