11)6 ACTINLE OF AIMATHOSS !• X l'l,( >KAT1( iN.'- — M' Ml'lOx'K H. 



of Mie iiu'scnti'iics, iiiid niimcKms iiivilics ;irr inclosed liclwrtii llio 

 moso^io'n of tlio I'old iiiid (li;il of tlio. iiu'soiitrry i>ro|)<'r,:is in Acfiiio.sh^la 

 callosn. 



()^ving• to tlic liu-k ol' nioic coniplcU' <l;ita \\\{\\ irjiiird (o tlii.s t'orni, 1 

 at tirst hesitated lo classify il. It seems, liowcAcr, \o helont; to llcit- 

 Avift's jieinis Lciolndio, (li(»ni;li without some knowlcdj^c, as to Ihe ar 

 ranji'einent ol' the tcntat'les, the correctness of this reference nuist 

 n'liiain uncertain; the jHobability seems to lie in favor of a ey«;lieal 

 arrangement of the tentacles. The tbrm recalls sitmewhatthatdescribed 

 by Verrill ('(i7) for Ka^osima iiay, da[>an, as Vri'n-'niK c(^<fiii<'((, but 

 the "few, slij;htly prominent, inconspicuous verrucic" could not be 

 detected. 



Family I'll YL!.A(TI1).E. 



Hexactinia' with simi>le conical tentacles at some distance IVoni the 

 ai>parent maruin; b<'t\veen them and the UKirj;in are low tentacular or 

 folios*' structures (fronds), Sphincter endodermal, ni()reor less circum- 

 scribed, lyinj"- in the interval between the tentacles and the frondos4», 

 or tentacular structures. From two to several cycles of mesenteries 

 ])ei'fect. 



I have elsewhere (\Sl)<() discuss<d the (luestion as to whether this 

 fandly should bo referred lo the suboider Stichodactylina', as Andres 

 ('S;>) has done, or placed in the snlxuder Actinina>, and have decided 

 in favor of the latter position. V]h)\i this view the fronds are to be 

 reji'arded as dilferentiated acrorha.ui. 



ilvuHH OULACTIS, IM.-Kdw. 



IMiyllactuhe in which the column is i)rovided w ith h)n^itudinal rows 

 of Ncnuca' in its up])er ])art; the fronds are foliose. Sphincter nniscle 

 more or less circnmscribed. 



32. Oulactis californica, sp. mov. 

 PlatH XXXII, V\<i. lOr.; Plato xxxiii. l<'i<;s. 107-108. 

 No. 741. Picliilinj;iii' May, (Julf of ("alifoniia. 'I'wo spociinoiis. 



The base is adherent and lather thin, allowin,"- the insertions of tlie 

 mesenteries to be seen throu.i;h it. The column (I'l. xxxii, Fij^-. 105) is 

 <'ylindrical, and in the alcolmiie s])ecimens shows no trace of ccdor. The 

 two specimens measure, respectively, .'>'"' and 3.5*'" in hei.iiht, Avith ii 

 dijimeter near the upper i)art of the column of 2'"' and near the base 

 of Lo'"'. Toward the upi)er part of the colnnni are verruca' arranged 

 in forty eij; hi longitudinal rows, each rowbeinji' com])osed of from ei.iiht 

 to ten verruca'. The ui»per ])orti()n bearinji- the liomls is m)t concealed. 

 The fronds occupy the marjiin and exten<l iinvards to the bases of the 

 tt'ntacles, which surround tlu'nionth; they are foliose, ap]>arentlybeeom- 

 inji' thickly .so toward their <'xternal extremity, and ai»i)ear to be forty- 

 Oi^ht in number, corresponding to the rows of verrm^jy, but owiji^ tQ 



