THE SERTULARID^E. 109 



Sertularia tamarisoa STEWMIT, Elements Nat. Hist. Animal Kingdom, II, 1817, i>. 441. 



Jliiiiiiiii'iin Idiiiiirixi'n DE BI.AIXVII.I.E, Manuel d' Aetinnlogie, 1MI4, ]>. 4s:i. 

 Serlularin tnmariscn LAMABCK, Hist. nat. anim. sans Vert., ls:;r>, p. ].">:;. 

 iSertufaria tamariwa HASSAI.I., Ann. and Mag., VI, 1841, p. 168. 

 Di.namena tamarisca FLEMIXC;, British Animals, 1842, p. 543. 

 Serlularia trtmarifru MACCII.MVRAY, Ann. and Mag., IX, 1S42, p. 1(54. 

 Sertulnrla tamariicn GRAY, British Animals, 1S4:!, p. 72. 



i liiuKirini-ii JOHNSTON, Hist. Brit. Zooph., IS47, p. 74. 



i STIMPSON, Marine Invert. (Jrand Chilian, 1854, p. 8. 

 fierln/ariti tuinnrixi'ii AI.DKR, Cat. Zooph. Northumh., 1S57, p. 25. 

 Si'i-liil/irin tuiitiirisca AI.LMAX, Ann. ami Mag., 3d ser., Ill, 1S5!(, p. 238. 

 Itijilnixiit liiiiiiii-ixi-d AiiAssix, Cunt. Nat. Hist. I*. S., IV. lsii2, p. :;55. 

 fSertulariaproducta A. A<;ASSI/, North American Acaleph.-e, IStio, p. 145. 

 Jti/iliiixin tiniiiirixi-ii HIXCKS, British Ilydroid /oophytes, 1S6S, p. 254. 

 Dijihnxia tamariska SARS, Bidrag til Knndskahen, 1873, ]). 19. 

 Dijiliiixin tnmarixca SCHTLZE, Nordsee Exped., 1S74, i>. 132. 

 Dijiliuxiii linnnrixcii (V\ wroitn, Ann. and Mag., 6th 8er., XVI, 1895, p. L'lil. 

 l>i/iiniiiena tamarisca BOXXEVIE, Norwegian North Atlantic Exped., 1899, p. 81. 



"Shoots stout and erect, irregularly branched, the branches commonly alternate, sometimes 

 opposite, long, .simple or variously branched. Hydrothoca- very large, cylindrical, the upper 

 half free and divergent, with a wide tridentate aperture; gonothecse (male) connircsscil. 

 obcordate, attenuated below, broad and truncated above, with a small spine at each side, and a 

 central tubular aperture; (female) elongate, oval below, above three-sided with a pyramidal 

 summit, the edges of the pyramid serrated and its basal angles produced into spines." 



Distribution. ? Grand Manan (Stimpson); Great Britain (Hincks); Adriatic (Olivi); North 

 Sea (Schulze); Norway (Sars); Bay of Biscay (Beltreuiieux, teste Hincks). 



I have not seen this species, and the above description is taken entire from that of Hincks, 

 which seems to be the best one available. The species may not be American, and is introduced 

 here because it seems that the Sertulana j>/'<i<lu<-t,i of Stimpson is this form, a view entirely con- 

 sistent with his description, which is as follows: "Cells opposite, elongated, curving outward, 

 with ovate apertures. Vescicles slender, elongated, subtruncate and covered with spines at their 

 extremities. It differs from S. in/ir<j<ir<fn Hassall, in having more numerous spines at the lop 

 of the vescicle and none on its sides." It seems evident that Hincks regarded >'. j>r<><ln<'fii as a 

 synonym of D. tamarisca, although he does not say so directly. He does, however, assign it to 

 Grand Manan on authority of Stimpson, in his account of the distribution of the species, and as 

 Stimpson does not mention I>. tiinmrix,;^ but does describe the species .V. j>i'o<lti<-t<i. which answers 

 to the description of D. tiunnrixcn , it seems certain that Ilincks regarded the two as identical 

 species. 



DIPHASIA FALLAX (Johnston). 

 (Plate XXIX, iius. L'-ii.) 



KI.EMINC;, Hist. I'.rit. Animals, 1S2S, p. 545. 

 /liiiiialu JOHNSTON, British /onphytes, ISI'.s, p. 127. 

 Sertula/ria pinnaia MACIMLI.IVUAY, Ann. and Mag., IX, 1S4J, ]>. 463. 

 Sertulariti Jullii.i- JOIIXSTOX, British Xonphytes, IS47, j). 73. 

 ,S', i-lii/tir!ii Jiil/iti STIMPSOX, Marine Invert, (irand Manan, 1S54, |>. '.i. 



rin j'nlln. i- ALDER, Cat. Zoojih. Northumli., 1x57, p. 24. 

 liHxiit f/il/n.r A. AIJASSI/, North American Acale]ih.-e, lX(i5, p. 142. 

 Diphaaiafallax'H.TXtCKB, Britisli Ilydroid /nop hytes. IXlis, ],. i_'l!i 

 J>ililiiiniiijiillii.i' VERKILL, Prop. Am. Assn. Adv. Sci., 1873, p. :!M. 

 Diphasia fattax VERKII.L, Amer. .lonrn. Sci. and Arts, VII, 1S74, p. 44. 

 jyijilinniii fiillnj- VERRILI., Amer. .lonrn. Sci. and Arts, VII, IS74, p. 504. 

 M/./m.wi /.f//<;r KEWKKS, Bullet. Essex Inst., XXIII, IS'.H. p. 38. 

 Itijilinxin j'ulliij: LEVINSKX, Vid. Medilel. naturli. P'oren., 1S1H', p. 55. 

 Di/naiiii mi J'n/lii.i- BOXXEYIE, Norwegian North Atlantic Expi-d., 1899, p. 78. 

 lHji/uixiii j'lil/ii : Nrrrixd, Hydroids of the Womls Hole Region. 1H01, ]>. 361. 

 Diplxixiii jiilln.r IlAUdiTT, Ameriean Naturalist, IH01, p. 391. 

 Diphagiafpttax \VIIITEAVES, ^Marine Invert. Kastern Canada, liMll, p. 'Jii. 

 Diphasia jattax SJ^.MUNDSSON, Islaudske Hy<lroider, 1902, p. 66. 



