T1IK SKKTULAKID^E. 1)9 



branches, others more, hut an equal number on hoth side-, no hydrothcc:e mi main stem. 

 Branches subopposite to alternate, ascending, const ricted at llieir origins where they I tear .-eve nil 

 deep annulations, divided into lone- hut unequal internodes, each of which bears several hydro- 

 thec<e. Hydrothec-e suhopposite, close lv approximated, deepl\- immersed, their distal ends only 

 being free, tuhular, very slightly curved di.-tally; aperture with two rather hroad teeth; 

 operculum composed of two Haps. 



(TOIIIIXIHIK.'. Not known. 



I>iKtribiit!nii. Shumagin Island.- and Port Moller. A la-ka (( 'lark): Yakutat, Ala-ka (Nutting). 



TI/J>C xt !(!,.<. Cat. No. I'.iTL'l, I'.S.N.M.; Cat. Nos. ls;7ti, ls;77. State I'niv. of Iowa; also 

 in the collection of the author. 



?THUIARIA LATIUSCULA (Stimpson). 



Sertularia latiuscula STI.MPSON, Marine Invert. < train! Manan, ls,">:;, p. s. 



Si'Hiilnriii latiiisrii/H VERIUI.I., I'rur. Am. Assn. Adv. Sri.. 1-":;, p. .'!~>i>. 

 Si'i-lii/iiriii luliiisi-iilti YKKUILL, Am. Jnnni. Sri. ami Arts, VII, 1S74, p. '.','.>. 

 S,Tlnl,irni lulinxi-iilii A. AC.AS.SI/, Xorth American Acalepli.-r, isii.i, j.. 14.">. 



' Pinna; broad, compressed, attached hy a slender liase to the main stem: cells crowded. 

 nearly opposite, shaped a.- in S, rtnl<iri<i nn/, nfi ; vescicles elongated, ovate, with a single -trong 

 spine on one side at the extremity. Color, brownish. Breadth of pinna, u.u:; inch. Dredged 

 in the laminarian /.one." 



Dixtriliiitian. Grand Manan (Stimpson); li miles east of Seguin Island. .".:' fathom- (Yen-ill); 

 between Cape Cod and Gulf of St. Lawrence (Yen-ill). 



I have been unable to obtain an authentic specimen of this species. The above description 

 is taken entire from that of the original describer. No further description nor any tigure has 

 thus far been found. There is no doubt that it is a 77m in ///, and it is quite probable that it is 

 T. a r<ji.-nt i.-<i. The single spine to the gonangium occurs occasionally in that species. 



Type. Apparently lost; at least, I cannot lind where it is. 



THUIARIA SIMILIS (Clark |. 



I Plate X, li'.'S. 7-9.) 



Xi i-liiliiriii simi/is CI.AKK, Alaskan Ilyilrniils, 1S7U, ]>. 219. 



'.'X i-lnliiriii tiiinilix II. \KTI.ACH, llyilniicli-n ails ilcm StiHen Ocean, IsiM, p. .'!.")-4. 



,S, 'i-liilin-iii xinii/ix XcTTiNii, Ilyilrnids (if tlie Ilarriman Kxiieilitioti, lillll, p. 185. 



Triiphoxoiiii'. Colony usually consisting of a central stem, sometimes attaining a height of 

 over 3 inches. Stem geniculate, divided into regular internodes. each of which bears a branch 

 and two hydrotheciB on one side and a single hydrotheca on the other. Branches divided into 

 usuallv short interuodes, each of which bears from one to several pairs of opposite or subopposite 

 hydrothecse. Hydrothecse in closely approximated pairs, the individuals of a pair being distinctly 

 separated in front, and of the -V rtnlnrni jnniiil/i type, with free outwardly inclined di-tal portions; 

 aperture with two well-marked and nearly opposite teeth and a two-valved operculum. 



(T<HIOX<>IIU'. Not known. 



Dixti-ilmtltiii. Hagmeister Island (Clark); Bare Island (Ilartlaiib): Berg Inlet, Glacier Bay 

 (Ilarriman Kxpedition); 1'uget Sound (Nutting); A/Imfm** Station L'Mi'. lat. N. .">4 I."/, long. 

 \Y. l(i(i <:;', 7^ fathoms; Station I'Si;;,, lat. N. 4s IL'', long. \V. IL'L' 4!i'. 4" fathoms; Station 3465, 

 lat, N. 48 al', long. W. 1*! 14', 4s fathoms; Station ;;M:.. lat. N. .V.i 59', long. \V. M7 53', 

 l:-i fathoms; Station :;:>:>7, lat. N. :>7 u4', long. W. 1 7u ^'4'. _'; fathoms. 



The specimen from Station :!.">1.">. from which the above description was taken, agree- very 

 well with Clark's original description and figure. Other specimens vary considerably, but not 

 sufficiently to demand separation. Indeed, none of them vary as much from the type as the 

 specimen tigured by Ilartlaiib. which seems to me to be quite distinct. 



Ti/j>i: In collection of the U. S. National Museum. 



