THK SERTULARID.E. 87 



There is considerable clouht us to tin- systematic position of this species. The large and 

 iionretractile hydrant!), as represented in Allman's ligure, resembles those of //,//, .-////,,. as does 

 also the. tliick and strongly fascicled stem. Tlie above description is copied entire from Allinan. 



TI/J>>: Iii Museum of Comparative /oology. Cambridge, Massachusetts. 



SERTULARELLA CYLINDRITHECA (Allman). 



( I'late XIX, tiir. 4. i 



Sertufaria cylindritheca \IA.M\\, ChalK'Hirer l;i-]irt, llydmida, I'l. L', isss, p. ."ill. 

 Sertularia cylindritlifca YKUSLI vs. Hydraires Calypt. Mcr dc. Antilles, isim, p. :;r,. 

 Sertularella cylindritheca II MMI.MI:, Revision der Sertularella-Arten, limn, p. 77 i parti. 



Trtiji/iiixiHii' . Colony attaining a height of about 4 inches. Stem not fascicled, geniculate. 

 divided into regular internodes, each of which hears a liydrotheca. Branches irregularly alter- 

 nate, themselves sometimes dividing dichotomously and resembling the main stem. Hydrothecse 

 large, cylindrical proximally and i|iiadrate in cross section distally, almost entirely free, the 

 adcauline side only being slightly adnate, aliout twice as long as broad; aperture <|iiadrate. 

 margin armed with four equal and equidistant teeth. Operculum of four tlaps. 



(jfiHinmiiiK .' Gonangia borne near the bases of the bydrothecw, j)edicel short, body shaped 

 much like the hydrotheea 1 . being cylindrical below and quadrate above. Distal end with broadly 

 expanded margin, which is quadrate and armed with four large flaring teeth. There are 

 numerous tine annular rugosities running around the whole gonangiuin. except on the proximal 

 portion. 



Dt8tmbution.Q& Bahia, Brazil (Allman); West Indies (Versluys); Trinidad, specimen in 

 United States National Museum. 



Versluys calls attention to the unfortunate name given this species bv its original describer, 

 Allman. The hydrotheca- are distinctly quadrangular in cross section, except at the base, and 

 hence the name " i-i/l ! m/i'it/i, a/ " is misleading. I am indebted to the authorities of the South 

 Kensington Museum fora part of the type collected by the I '/mil, n,/, r. from which the accom- 

 panying drawing was made. 



TI/PI-. In the collection of the South Kensington Museum. Fragment in possession of the 

 author. 



SERTULARELLA GIGANTEA Mereschkowsky. 



M'latr XIX. ti. 7.) 

 Si-rlnliifi'llii i/ii/iinliii MKKKSCHKOWSKY, Ann. and Mair.. "illi Ser.. I, 1S7S. p. :i:;il. 



'/'i'iyi/tnxii/11,'. "The tolerably tlexible stiMns spring from the branched hydrorhi/a ot'ten 

 without ramifying; sometimes they divide at their base into two or three branches, each of 

 which may again ramify once more; the terminal branches are in all case^ very long ami straight. 

 The hydrothecse are evidently alternately arranged upon the angularly bent stem; frequently \\e 

 observe three or four undulations (ribs) crossing the hydrotheea 1 ; it- form is much elongated, 

 only a little widened at its base; in si/e it is two or three times the length of the hvdrotheca of 



. . . 



X jHili/.-.niiitix. In adult indi\-iduals the margins are always furnished with se\eral ledges and an 

 equal number of small opercula placed one above the other. lielow each hydrotheea the stem is 

 slightly ringed." 



Unknown. 



n. White Sea. (Mereschkowsky.) 

 The above description is quoted entire from that of the original describer. Mereschkowsky 

 believes that this species is the same as X. / /<,////:,////,/.v \ar. </nj(int,,i Ilincks. a position positi\e|\ 

 denied by Ilincks, who seems to me to have the belter of the argument. Ilartlaub' considers 

 .V. quad/ricomuta Hi neks as a synonym of x'. j >///;. <// /, /*, \\ hid i does not apjiear from a comparison 

 of the original descriptions of th. 'two. lie- also considers the X'. /),i///:v<///V/.v. found in Alaska and 



1 Description taken fnnii \Yrsln\s. rrlVrem-e in s\ nnn\ my. \\ Im \\ :IH the lirst In dcsiTiln- it. 



z Revision der Sertularella-Arten, limn, p. i'n. 



