114 AMERICAN HYDROIDS. 



Intel-nodes of stem irregular. 



Distal ends of hydrothecif very greatly narrowed, hydrothe&e very short trunk! . 



Distal ends of hydrothecse much compressed - amphora. 



Distal ends of hydrotheivr not greatly re impressed. 



More than one-half of adcauline wall adnate aiiguiim. 



Aliout one-third of adcauline wall adnate gracilin. 



Hydrothec;i' leaning forward in noticeable degree. 



Ends of liydrotlieiw much compressed compresmi. 



Ends of hydrothecse not noticeably compressed. 



Hydrotheca> not curved alexmideri. 



Hydrothecrt- distinctly curved. 



II ydrothecal margin with two adcauline teeth in some cases, and without teeth in 



others, in the same colony. < tonangia annulated yreenci. 



Margin always without teeth, gonangia with longitudinal ribs i-mttnin. 



Less than one-fourth of adcauline wall free. 



Stem very dark, thick, and woody, m it translucent uiniiilatu. 



Stem thick, but not woody, horn color, translucent. 



Stem with regular internodes, each bearin.tr a pair of hydrothec.-i- turglda. 



Stem with irregular internodes ; gigantea. 



ABIETINARIA ABIETINA (Linnseus). 

 (Plate XXXII, figs. 1-3.) 



Sea fir ELLIS, Essay Nat. Hist. Cor., 1755, p. 4. 



Sertnlariit dbielin.fi LixN.Ers, Systema Natune, 1758, p. 808. 



Sertitlnriii alni'tiiui LIXX.EUS, Fauna Snecica, 1761, p. 540. 



Serttilnr'ni nliii'lina HOUTTUYN, Natuurlyke Historic, XVII. 1761-7:!, p. 534. 



Sertitlrii-iti nliii'tinn RASTER, Dissertation de Zoophytis, 1762, ]>. 11.'!. 



ficrtulnriii nliii'lina PALLAS, Elenchus Zoophytorum, 1760, p. 133. 



i uliii'tiiia Lixx.Krs, Systema Xatune, 1767, p. 1307. 

 abietina BODDAERT, Lyst der Plant-Dieren, 1768, p. ItiH. 



nbietiiia OI.AFSF.X and POVEI.SEN, Ri'jse igiennem Island. Sortie, 1772, j>. 40. 

 fiertiilai-in nliii-linn MARATTI, De Plantis Zoophytis, 1776, p. 27. 

 Srrtiilnri abietina Mr LLER, Zoologise Danicie, 1776, p. 255. 

 &'rtnt(irin uliietinn FABRinrs, Fauna Urci-nlumlica, 1780, ]i. 44.. 

 !\,ftiilnrin ahii-tinn (TROXOVIVS, Zoophylacium gronovianum, 1781, j>. 357. 

 S,-i-/ii!iiriii uliii'tiiiii ICLLIS and SOLAXDER, Nat. Hist. Zooph., 17SH. p. 36. 



i uliii-tiiin. \ViLKixsand HEKMST, Charakteristik der Thierptlanzen. 17S7. p. 172. 

 riii iiliitliiia G.MELIX, Systema Natune (Linnteus), 1"SS-!I3, p. 3S45. 

 Serlitlaria abietina ESPER, Die Pflanzenthiere in Abbildungen, III, I7.ss-]8oii, p. 171. 



t iiliii-tiiin BERKEXHOUT, Synops. Nat. Hist. <ireat Britain and Ireland, I, 1789, p. 216. 



i nliiiiiiin POIRET, Voyage en Barbarie, II, 17811, p. 70. 



i iilii<ii>ni ESI-EK, Fortsetzungen der Pflanzenthiere, II, 17H4-1806, pi. i. 

 riii uliirtiiiii Bosc, Hist. Nat. des Vers, II, 1802, ji. U2. 

 \'i-tii/iirin 'iliii'iiiialvKTon, British Fauna, 1807, [>. 212. 



i iiliii'liiKi JAMKSON, Cat. Animals Class Venues, 1S11. p. 5H4. 



! ah id i an LAMOUROUX, Bull, philomatiqne, 1812, p. 184. 

 ' Nigellastrum nhii-inunn (.)KEN, Lehrbuch der Naturgeschichte, 1815, p. 9o. 

 Xn-tiiliiriii iiliii'liiiu LAMARCK, Hist. nat. anim. sans vert., II, I81t>, p. I Hi. 

 Xfi-tuliiriii nliii-tiiiu I.AMOi'ROi'x, Hist, des Polypiers, 1816, p. 1S7. 

 Srrliilnrin nliii'tinn STEWART, Elements Nat. Hist. Animal King., II, 1817, p. 441. 

 St'i-tiilin-iii iiliSi'timi Si IIWEIGGER, Handlinrh drr Naturgeschiclite, 1820, p. 427. 

 St'i'tiilitrin nliii'tinn LAMOI uorx, Exposition Mi'-thodique, 1821, p. 12. 

 s,-i-tiilni'!(i iilniiniii HE I>LAixvii.LE, Manin'l d'Actinologie, is:!4, ].. 480. 

 Sirtiiliiriii iiliiftitiii OKEX, Allgemeine Naturgeschichte, 18.".">, p. so. 

 Si'i-1iiliiri<i if/iiiiiiiii LAMAUC'K, Hist. nat. anim. sans vert., 1836, p. 141. 



i nliiiiiiin (liiAY. British Animals, 1841, p. 72. 

 fi/iiiliu'i II\>SM.I, Ann. and Mag., VI, 1841, p. His. 

 i iiliii-liini Fi.KMixii. British Animals, 1842. p. ">43. 

 iiliii-tiini M AC (in.i.iVRAY, Ann. and Mag.. IX, 1S42, j>. 464. 



i iiliifliiiii HVXD.MVX, Ann. and Mag., X, 1842, p. 20. 

 X, i-in/iiriii iiliii-liini D.M.VEI.I., Hare ami Hemark. Anim. Scotland, 1S47. p. l.~>0. 

 S,'i-iii/in'i<i nliii'tinn JOIIXSTOX, Hist. British Zoopliytes, 2il ed., 1S47, p. 7">. 

 Si'i-tnlnrin nliietiiin < iosSE, Devonshire coast, 1853, p. 434. 



