THE SKKTULAKID^E. 131 



I he proximal node. those on the I wo side- iif i In- atom apparently not arranged with any reference 

 to each other, being somet inics oppo.-ite anl sometimes -uboppo-ite. subalternate or alternate; no 

 nodes. Hydrothecse in four series forming regular vertical row-, those in a given row being 

 separated by alioiit onc-t'onrlli their length, the four scries being placed so that not only a vertical 

 lint al-o a ,-piral arrangement of hydro! heca' can lie traced; individual hydrothe.-e rather short 

 and stout, broader below, with a bracket -shaped chitinous thickening at the bottom, and an oval 

 aperture which sometimes ..hows slight angles at the sides; opcrculnm a single abcauline lla]i. 

 ,: Not, known. 



i. Port Ajan(M. Wosnessensky); St. Paul- Island. -i'.\ fathoms (Kirchenpauer); 



AH><itroxn Station :;.Vi>., lat. N. .Ml ;..s'. long. \V. 17u u;r. ;.';, fathoms. 



The specimen from Stiition :i.V>s answers i|iiitc exactly to the original description of 

 Mereschkowsky, except that the arrangement of the branches seems less regular than his 

 description would indicate. The color of the colony is light brown, lightening on distal parts 

 to a brownish buff. 



'////' In the collection of the Academy of Science-.. St. Petersburg. 



SELAGINOPSIS ORNATA, new species. 

 I I 'laic XL, li-s. 1-3. i 



Ti'nj>Ii<ixtini,'. Colony plumose, attaining a height of about 4 A inches. Stem, straight, thick, 

 more attenuated in proximal portion, divided into irregular internodes b\- usuallv distant nodes; 

 ccenosarc canaliculated. Branches on opposite sides of stem and borne on short and inconspic- 

 uous jirocesses. iri-ei;'iilar iii disposition, being either opposite or alternate, closely approximated, 



there lieinjf reu'ularly but two liydrotheca' lietwecn adjacent branches; cci'iiosal'c of branches 

 very regularly canaliculated, there being four canals running through each branch, each canal 

 supplying a row of livdrothecie; branches not divided into internodes, but themselves often 

 branching to form terminal branchlets. Hydrothecae in four regular and equidistant rows, aud 

 also in spirals, cylindrical, almost entirely immersed, nothing but the margins being free; aper- 

 ture oval, nearly round, with shallow lateral teeth and evident sinuations; operculum a single 

 abcauline Hap. The top of one hvdrothcca does not reach quite to the bottom of the one above. 



(to/Kixmii, . Gonangia borne in ro\\son front of branches, each being' inserted just below 

 the base of an liydrotheca. obconical, long, produced into a rather slender pedicel below, and 

 bearing about eight remarkably long, bifurcated arms or processes above, which curve inward 

 toward each other at their distal ends so as to form a sort of pseudo-marsupium above the body 

 of the gonangium. 



lUx/i-Hiiit ;<>n. A llHih-nxx Stat ion ^ !: :;. lat. N. 53 .M/. long. \V. Hi.-) 5ii'. 45 fathoms. 



In its trophosome this species is clo-cly allied to >'. jiiiunif/i, from which it differs in the 

 rei'-iilar ai'ran"'eiuent of coenosarcal canals in the branches and also in bavin"- but t wo hydrothecffi 



. > O D 



bet ween adjacent branches. 



Ti/]>, slides. Cat. No. insn. C.S.N..M. Cat, No. 1S7MS. Museum of the State I'niversity 

 of Iowa; also in the collection of the author. 



SELAGINOPSIS CYLINDRICA (Clark). 



I ]'I:M.' XXXIX. li'JS. 7-80 



Tliii'tiii-in ,-iirniilfi<-ii Ci M:K. Alaskan 1 1 y.lr, .i.l^. |s7ii. p. 1'L'li. 



iS'i7i/i/i(i/)s/x I-I///HI Irii-ii MKHICSC 'iiKdWSKV, Ann. ami Ma-_'., "illi >cr.. II. 1S7S, \<. I l.'i. 

 Si/ni/liiii/ixiii i-i/linili-ii-ii KIKI m-:xru 1:1:, Nunlische i ialtunirni, Iss4, \<. l_. 

 Tliiiiiii-in i-i/liiiilrini ^Ii IMIIICII. K\iieililiiin I.. I'nim I'.arnnv. lss."i, p. Kin. 



i-ii/iii< Irifii MARKTANNER-TURNEEETSCHER, Ilyilmiilen llni'mnsi-'iinis. is'.io. p. 1*4:;. 

 i-n CU.KISS, Some llyilniiils fniiii I'lifict Smuul. I Mm, p. ::iiL' 



i'iili,ii/i'i'-'i HAUTI.U-I:. llycli'iiiili-n ans dcin Stilli-n <><vaii. I'.MII, p. :;54. 



ii,:-- Colony attaining a height of about .". inche-. plumose. Stem slender basally, 

 enlarging distallv. iuleriiodes long and irregular, regularly genicnlate. a row of hydrothecie on 



