THK SKlMTLAKin.V. 129 



werden ;il XT nadi oben /n heller mid sind unregelmassig gefiedert. Die Fiedern sind fftdlich, 



schlart' und mil mehreren, ot'Hi Keihen von Ilvdrotheken beset/t. l>iesesind eiformig. sind aber 

 oheu mit einem vorragenden Hals versehen, auf welchem sich die .Mundotl'nung hetindet. I>ie 

 (lonotheken sind schlaucharl ig (ut riculares), mei-tens angeschwollen, fast durch>ichtig. haben 

 eine runde, von einem wulstigen Rand uuigahene ( Hl'nung und sir/en oi't xn beiden Seiten der 

 /weige. dicht gedrangt, fast daelmegelfOrmig." 



Distribution. Siberian Polar Sea (Lepecliin): St. J'aul's Inland (A. and A. Kraiisr). 



The. identity of this peeie- i- doubt I'ul. Tlir foregoing description is quoted entire from 

 Kirchenpauer and is the only good description that I can rind. Kirchenpauer bases his descrip- 

 tion on a fragmentary specimen found in the collection made by A. and A. Krause in Bering 

 Sea. His drawing, which I have copied, shows an irregularity in the distribution of hydrothecae, 

 which a I'e represented as not in regular vertical serie^. nol found in other species of the genus. 



Otherwise it would seem likely that X. pinaster and .s'. cylindrica Q&rk were identical. It 

 does not seem likely that S. pinaster is the same as /' i-i<-/it<l!inii li'nl, nliitnm. as Miggested by 

 Kirchenpauer. the latter species having well-marki'd lateral hvdrothecal teeth, which are not 

 indicated in Kirchenpauer's description or drawing of .V. 



SELAGINOPSIS TRISERIALIS Mereschkowsky. 



( I'lat.- \X\I\. li-!-. 1-1'. I 

 ,\-liti/iiiii/Ki.< Iran i-inli.-i M I:KK.M HKO\\>K\ , Ann. ami Ma-j.. ."itli>er. . II, 1ST*, ]'. 4:!."). 



Selaginopsis trigerialis K.IRCHEKPAVER, Nordische Gattungen, lss4, p. 14. 



Si'i-liiliii-in iimiiii/i'iiii TnuitKV, Ilyilniiila nf the 1'ariMr masl, I'.IIIL', \<. ii!l. 



Ti-iij>/ii>xniin'.- Colony attaining- a height of about 1' inclie.>. Stem straight, with distant and 

 irregular nodes, and two rows of completely immersed hydrothecse on opposite sides. Branches 

 with a pinnate appearance, but really arranged in an open spiral, borne on short processes from 

 the, stem that do not bear hydrothec;e, with very distant node-, or none, llydrothcca' in two 

 rows on proximal portion and in three rows on distal portion of each branch, where they also 

 follow a spiral arrangement, more distant from each other than is common in the genus, there 

 being often a considerable space between successive hydrotheeje and also between the rows, 

 almost entirely immersed, only a very short moiety of the distal end being free: aperture nearly 

 round, without teeth or noticeable angles; opercuhim a single adcauline Hap. 



(r'ti/iiifsntiir . A single distorted gonuiigimn \\as present in the specimen described; oblong- 

 oval in shape, with a large terminal aperture. I believe it has not been described before. 



I)i>;1 r'lltiiiinn. Kamchatka (M. Kastilsky); San Pedro, California (Torrey); Albatross Station 

 L".MIS. hit. N. :'4 I'.V 25", long. W. I '2" -_'n'. :',! fathoms. 



This is the most southern locality for tlii> genus on the Pacitic coast. Torrey regards this 

 form as showing an intergradat ion between 77m/<ir/ii and S, /,/,//' /mjixix. Sevei'al species of 

 Xil,i,/iii<ii>x!x< however, ha\e but. two rows of hydrotliec;e on the proximal part of tli ! branches, 

 the other rows being intercalated distally. 



Ti/jii . - In the collection of the Academy of Sciences, St. Petersburg. 



SELAGINOPSIS PLUMIFORMIS, new species. 



I I'late \.\\I.\, M-. :!. > 



Ti'nj)/i,ixin/i, .- Colony branc-hing in a regular symmetrical compound manner, and attaining 

 a height of about I inches. Stem regularly geniculate. irregularly annulated in proximal 

 portion, divided into vcr\ irregular internodes by distant nodes, \\ith a row of immersed 

 hydrothecse on each side. Primary branches alternate, borne on short proce.-ses from the >tem, 

 there being three hvdrothec;e on the stem between adjacent processes; a \er\ short liasal 

 internode intervenes between this process and the first hydrotheca of a branch; otherwise there 

 are no regular internodes. the primary branches resembling the main stem in all particulars and 

 bearing a row of immersed hydrothecse on each side. Secondary branche- regularly alternate. 



