THE PLUMULARID/E. 59 



which they spring from the axils of the piunip, opening on the .summit by a wide, oblique 

 aperture. 1 



Distribution, Alligator Reef, from a depth of 88 fathoms; Albatross Station 2415, lat. N. .'50 

 44', long. W. 7! 20', 440 fathoms; Albatross Station 2601, lat, N. .'54 39', long. W. 75 33', 107 

 fathoms; Albutrox* Station 2667, lat. N. 30 53', long. W. 70 43', 273 fathoms; Albatross Station 

 2669, lat. X. 39 09', long. W. 79 33', 352 fathoms. 



Type. In the Museum of Comparative Zoology, Cambridge, Massachusetts. 



PLUMULARIA HELLERI Hincks. 



(Plate II, tifj. M. ) 



Anisicaly.r urtai'eim HELLER, Zoophytcn nnd Erhinodrrmrn des Adriatischen Meeres, ISfiS, p. 41. 



Plumularia lielleri HINCKS, Ann. and Mai;. Nat. Hist., 1872, IX, p. 120. 



Plumularia lielleri KIRCHKNPAUEK, Ueber die Hydroidcnfamilie Pliiniularitla*, 1876, Pt. 2, p. 28. 



Plumularia helleri MARKTANNER-TuRNERETSCHER, Aunaleu des k. k. naturhistorisohen Hot'imiseums, 1890, p. 251, 



pi. vi, tig. 3. 

 Plumularia lielleri CLARKE, Bull. Mus. Comp. /ool., 1891, XXV, No. (i, p. 7ti. 



Trophosome, Colony attaining a height of 1.5 to 2 centimeters; stem divided into interuodes, 

 each of which bears a hydrocladium on a process from its distal end; hydrocladia composed of 

 alternating hydrothecate and intermediate iuteruodes, the former being the longer. Hydrothecas 

 bell-shaped, rather distant, and placed on the distal ends of the internodes, their posterior margins 

 being on a level with the nodal joints; a single mesial nematophore below the base of each hydro- 

 theca, none on the intermediate iutemodes, and only a few scattered over the stern.-' 



Gonosome. Uukuown. 



Distribution. Rovigno (Baron Lichtenstein) ; Adriatic Sea ( Kirchenpauer) ; Albatross Station 

 3384, Pacific, south of Panama, 458 fathoms. 



The original describer suspects that this species is identical with Plumularia ftimilitt of Hincks. 

 Not having either species before me, I am unwilling to venture an opinion, and therefore leave it 

 as a separate, species, although a comparison of Marktanner-Turneretscher's figure of P. helleri and 

 Hincks's figure of P. similis shows no appreciable difference between the two. 



PLUMULARIA FLORIDANA, new species. 

 (Plate II, figs. 4, 5.) 



Trophosome. Colony attaining a height of one-half inch, a delicate plumose stem; stem not 

 fascicled, divided into very distinct interuodes, each bearing a hydrocladium on a process from its 

 distal end, there being two or three aunulations at each node; hydrocladia divided into alternate 

 hydrothecate and intermediate iuteruodes, the former being at least twice as long as the latter; 

 there are often two very short intermediate internodes or annulations which look like nodes. 

 Hydrothecu- very large, in the form of short cylinders resembling those of P. catharina, the dis- 

 tance between adjacent hydrothec;e being only about twice their diameter; a considerable portion 

 of the posterior face is free from the intemode; supracabycine nernatophores minute, not reaching 

 the top of the hydrothec;e; one nematophore below the base of each hydrotheca, one on each 

 intermediate intemode, one in the axil of each hydrocladium, and a cauline nematophore on each 

 internode of the stem. 



Gonosome. Not known. 



Distribution. Two miles west of Cape Romano, Florida (Lieut. J. F. Moser). 



This is a very distinct species, combining the characters of the setacea and catliarimt types, 

 having the stem and hydrocladia of the former with the hydrothec;i- of the latter. 



Type. In the collection of the U. S. National Museum. 



1 Original description. 

 Description condensed from the German and rearranged in accordance with the plan adopted in this work. 



