THE PLUMULAKID^E. 65 



PLUMULARIA PALMERI, new species. 

 (Plate VI, figs. 4, 5.) 



Trophosomc. Colony unbraiiched, growing in dense filamentous tufts of very slender stems, 

 attaining a height of about 4 inches; stem not fascicled, divided into regular internodes, each of 

 which bears a hydrocladium on a process near its distal end, and shows a strong septal ridge near 

 its proximal end and an obscure septal ridge near its distal end; hydrocladia longer than in /'. 

 lagenifera, divided into alternating hydrothecate and intervening interuodes, each of which has 

 a septal ridge near each end; hydrothecate internodes more than twice as long as the others, with 

 a faint septal ridge near the bottom of the hydrotheca, besides the two strong ones at the ends. 

 Hydrotheca' cup shaped, about as deep as wide, considerably wider at the top than at the bottom, 

 and with a straight anterior profile; supracalycine nematophores with their insertion on a level 

 with the tops of the hydrothecae; a mesial nematophore on a swelling below the hydrotheca and 

 another on the front of the intermediate internode; two cauline nematophores in the axil of each 

 hydrocladium, and one on the opposite side and proximal end of each cauline internode. 



Gonosome. Not known. 



Distribution. San Diego, California. Collected by Mr. Edward Palmer, after whom I have 

 named the species. 



P. palmeri resembles P. lagenifera in its mode of growth, but differs from it in the size of the 

 colony, and more particularly in the shape of the hydrotheca'. The septa! ridge at the bottom of 

 the hydrotheca is not so strong. The color of the stem is usually horn color. The species differs 

 from 7*. corruyata in mode of growth, the latter being a dendritic rigid species with stiff, long 

 branches, more distant hydrotheca', longer intermediate internodes, and more numerous septal 

 ridges. 



Type sMes.C-iit. Nos. 18624, 18625, U.S.N.M.; Cat. No. 15327. Mus. State Univ. Iowa; also in 

 the collection of the author. 



PLUMULARIA LAGENIFERA Allman. 

 (Plate VI, figs. 6-10.) 



Plnmiilaria lagenifera Ai, I.MAX, Jonr. Linn. Soc. Loml., Zoo]., 1885, XIX, \<. 157, ]>1. xxvi. 



Plumularia mlifoniiai MARKTANNKR-TURNF.RETSCHER, Annalen des k. k. naturhist. Hofiimsuiims, 1X90, V, No. '2, 

 p. 255, pi. vi. 



Trophosome. } Colony sparsely branching, growing in dense filamentous tufts, and attaining a 

 height of about 3 inches; stem not fascicled, divided into regular internodes, each of which bears 

 a hydrocladium on a stout process from its distal end, and a septal ridge near each end; hydro- 

 cladia short, with their distal ends recurved toward the stem, divided into alternate hydrothecate 

 and intermediate internodes, the former being the longer and having a thickened transverse septal 

 ridge near each end, and another opposite the bottom of the hydrotheca; intermediate internodes 

 not more than half as long as the hydrothecate, and witli a transverse septal ridge at each end. 

 Hydrotheca' stout, somewhat ventricose, wider than deep, borne on a prominent swelling on the 

 middle of the anterior face of the interuode; supracalycine nematophores originating above the 

 hydrothecie; a mesial nematophore borne on a protuberance below the hydrotheca and another on 

 the intermediate internode; one or two cauline nematophores in the axil of each hydrocladium 

 and one on the opposite side and proximal end of each cauline. internode. 



Gonosome. Gonangia oviform, with long slender necks and round, terminal openings. They 

 are flattened so as to appear quite slender, like those of P. setacea when viewed from the side. 



JUstribution. Puget Sound, Dr. Steindachuer; coast of California, Clark; Vancouver Island, 

 Allman. 



Specimens of this species from the British Museum agree perfectly with Marktauner- 

 Turneretscher's description and figures of P. ciiiifornica, which I regard as a synonym for P. 

 lagenifera Allman. 



Specimens from Yale University Museum, labeled "Coast of California," marked P. setacca, 

 belong undoubtedly to P. lagenifern. The resemblance to P. setacea being merely superficial as a 

 direct comparison with specimens of the latter species in the South Kensington Museum shows. 



1 Described from specimens from the Museum of Yale University, kindly sent me l>y Professor A. E. Verrill. 

 12833 5 



