T11E SKKTri.AIUD.dS. 55 



Si'rliilin-in />: fi-iil'iln MIMICS, r.rii. Ilycln.iil /,., ph., 1st is. |,. ui;: 1 ,. 



S, i-/ii/,ii-in ,1/1: i-riil,iiii M. IM..MI. Ann. and Mai.'.. 4lh SIT., XIII. ls7l, p. -_'lo. 



f Sertitlaria operculata TttoxtvoN, Ann. ami Man., ">ih aer., III. isT'.i, p. n>. 



Sertillaria Operculata \VI\IIIKK, l-'i>rti)_'i]cl.-r dc i liamnark Ilydr.. I ssi I. p. L'liti. 

 Sertutaria operculata \\ M.I:, .Imirn. Microscopic Society, Victoria, issi. p. :J4. 

 Serlularia operculata I! M K, Cut. Australian llyilmiil /ooph., is.s-i. p. 117. 



Si'i-liil,!, -in n/i, i;-u/,ll,l \o\ I.KXIIKXKKI.I), A list nil illll I 1 Vi I n nilri Ills;. . l.ssl. p. ll'JL'. 



Sfi-iiilm-iii n/i: i-i-ii/nln AI.I.MK.X, ('luilli-ii'.'er IJepori. llvdroida, 1't. 2, 1SSS, p. til. 

 .s. I'liilnriii ii/ii'ri-ii/,ilii CH.UVKOIIII. Ann. and Mai:., lilli scr., XVI, Isii.'i, p. L'i;i. 

 ,S'i ilnliii 'in ii/M'i-: -ii/iiln I'.OXNKVIK. Norwegian North Atl. Kxpcd.. ISiHt, p. 79. 



ii, . -Colonies growing in tufts of very slender, delicate stems. sometimes attaining 

 a liciu-lit of ,s to in inches. Stem simple, straight, translucent, divided into more or Ir^s 

 regular iiiteniodes, earh of \vliieli normally hears a pair of hydrothotw. Hranclie> distant, alter- 

 nate. tliemselve^ profusely lu'anehed in a diehotnmous manner and tending; toward an erect 

 posture; internodes like th.>se of the stem. I lydrotheca 1 rather distant, strictly opposite, lean- 

 ing forward, tulmlar, the abcauline side nearly straight, the adcauline side immersetl except its 

 distal third: aperture laru'e. lieveled so a-, to face upward and slightly inward. Mai-yin witli two 

 I a rye aboauline teeth, one of which is much lonyer than the other and continued to a slightly 

 curved sharp point. Operculum very delicate, of two parts, one of which is much laryer than 

 the other. 



(iotmxiitui: Gonangia horne on stem and branches, lonjj, ovate, with larye distal aperture 

 and open-ilium, and no neck. Walls perfectly smooth externally. 



Distribution. Almoai world-wide, except on the coasts of the Tinted States. Arctic 

 Atlantic (Pxmnevie); Denmark (\Vinther); British coasts (Hincks): llelyium (\'an ISeneden); 

 near A/ores, 4."iU fathoms (Allman): Africa (Husk); Australia (Male); New Zealand (Thomp- 

 son); AHiiiti-iixx Station jiTTo. lat. S. 4s :'.T'. lony. W. ti.'i 4t>', ">.s fathoms; .!//////* Station 

 L'77-_'. lat. S. 5i' If/, lony. \V. (is 13', ::!.."> fathoms; Mlmtrnxx Station -J77:-!. lat. S. :<! -J.:\' . lony. 

 \\ . (is 11'. lo fathoms; AH,<iti-xx Station L'77.\ Straits of Majrellan. -J ( .t.:> fathoms; . I Ih.ih ,,.,.. 

 Station 2777, Straits of Magellan, l!.7."> fathoms. 



The distribution of this beautiful sertnlarian is quite unusual, reaching from the Arctic 

 ()cean to the Straits of Magellan. As yet it has not lieen re]iorted from the coa>t> of t he 

 I'nited States. 



SERTULARIA PULCHELLA [ d'Orbigny). 



liiiiiniiii mi /iitlrhi'lln n'OitiiKixv, \*iiy:ifri' dans I'Ani^rique nn'-ridicmalr, Isli;, p. I'll. 

 Sertuloria furcata TRARK, I'mr. ('alii'. Acad., Man'h, Is."i7 p. ML'. 

 .Si -rinliiriii j'ni-rii/ii Ai. \ssix. Xurtli Anicricuii . \ralrplia-, ISIi.'i, p. I 4.">. 

 ,S' ( i-tii/tii-iit J'ni-i-iitii CI.M;K, I lydmids nt' tin- I'arilic I'nasl. |s7ti. p. iT,s. 

 x rlnliir'ni I'lin-'il'i THUKKY, Hydroida of the l':n-itir < 'cuisl, limi', p. iit>. 



Tropkosorne. Stem short, unbranched, rooted hv a creeping stolon, simple, spreading in 



every direction forming dense verticil la ted clusters around the pieces of fiicuson which it is usual I v 

 found, attached to the stolon by a short, .slender, twisted process about the length of an internode, 

 di\'ided by t rans\-erse joints into short regular internodes each bearing a single pair of hydro- 

 theca-; color corneous. 11 vdrotheca- opposite, deeply immersed in the stem, with the two large, 

 short teeth on the outer margin and a la rye aperture generally reaching to the >tem. (( 'lark.) 



(iiiiinx,ii,i< .- (ionotheca- large, sessile, generally borne near the base of the stem, though 

 occasionally found scattered over the entire length, of an elongated oval form, sometimes slightly 

 compressed, with a large, circular, terminal aperture. (Clark.) 



Distribution. -Q&y of San Francisco and Farallone Islands (Trask): Santa Crux.. Mav of 

 Monterey, San l>iego, Santa Barbara (Clark); San Pedro. Coronados Islands (Torreyl. Shore 

 to 24 fathoms. Patagonia (d'Orbigny). 



I have not seen this species, and the above description is copied entire from that of ( 'lark, who 

 was the tirst one to give a complete description, including gonosoine. 1 The beautiful figures 



'Turivy rlainis tn !>< tin- lirst tn drsrrllic the L'"iiiisoine of tin- N. fnrriiln, \vlicn. ciiriipu-ly i-nuii'.'li. the papiT of 

 Clark's which lit- cites Drives both a clear di -script! mi and a L'<>, id ligtirt- of lint h tiMplm-i.nu- and ^(.n.i-. .me. 



