64 AMERICAN HYDROIDS. 



PLUMULARIA GOODEI,' new species. 

 (Plate VII, figs. 1-4.) 



Trophonome. Colony minute, consisting of undivided plumose stems growing from a creeping 

 root stalk, attaining a height of about one-half inch. Stem not fascicled, straight, divided iuto 

 regular intemodes, each of which bears two hydrocladia on projections from its opposite sides, 

 one projection being near the proximal and another near the distal end of the internode. Hydro- 

 cladia not very closely approximated, stout, strongly recurved, eacli with a short proximal inter- 

 node and three or four other iuternodes, all of which are hydrothecate and without septal 

 ridges. [lydranths large, incapable of retracting within the hydrotheca 1 , with broadly expanded, 

 disk-shaped proboscis and about twenty-four tentacles. Hydrotheca 1 cup-shaped, with slightly 

 recurved marigus, borne near the distal ends of the iuternodes; nematophores monothalamic, a 

 supracalyciue pair barely reaching the level of the top of the hydrotheca and a mesial nemato- 

 phore some distance below each liydrotheca. There is a pair of naked sarcostyles without hydro- 

 theca; in the axil of each hydrocladium. 



Gonosome, Not known. 



Distribution. The type was dredged off Santa Barbara, California, outside of the kelp, by 

 Mrs. Virginia Barrett (Hbbs. 



This species is closely allied to 7'. pinna-fa, from which it differs in having supracalyciue 

 uematophores and in having constantly two instead of several hydrocladia to each inter node of 

 the stem. P. goodci is the only American species that I have encountered with monothalamic 

 nematophores, in which it agrees with P. pinnata, /'. xiinilis, and P. n-.himtlutu all British 

 species. 



Type slides. Cat. No. 15329, Mus. State Univ. Iowa; Cat. No. 1S023, U.S.N.M. 



PLUMULARIA CORRUGATA, new species. 

 (Plate VI, tigs. 1-3.) 



Trophosome. Colony a simple plumose stem attaining a height of li inches; stem not fasci- 

 cled, divided into regular internodes, each of which bears a hydrocladium on a process from its 

 distal end; hydrocladia alternate and lying in the same plane; proximal internode short, with a 

 single internal ridge, next internode hydrothecate and with three or four internal ridges, the next 

 internode intermediate with two internal ridges. The remainder of the hydrocladium is made 

 up of alternate hydrothecate and intermediate internodes with ridges as described above, those 

 bearing hydrotheca 1 being considerably longer than the intermediate ones, which are at least 

 twice as long as broad. Hydrotheca' distant, about as deep as broad and placed near the middle 

 of the internode ; supracalyciue nematophores present; a mesial nematophore below the base of 

 each hydrotheca, one >n each intermediate interuode, one at the axil of each hydrocladium, and 

 one on each stein joint on the side opposite the process which bears the hydrocladium. 



Cronosomi'. Gonaugia of two kinds, much as in P. lagenifera,lmt I have not found both kinds 

 on the same stem. The kind resembling those of P. setacen is very greatly elongated, being about 

 fifteen times the length of the hydrotheca 1 , while in our specimens of P. setacea the gouangia are 

 only about seven times the length of the hydrotheca 1 . It occurs to me that the triangular gonangia 

 spoken of by Marktanner-Turneretscher may be the shriveled gonangia of the first type, which 

 have extruded their contents. A specimen before me would suggest this idea. 



Distribution. Long. W. 40, lat. S. 22^ to 23 (Kichard Rathbun); 10 miles east of Petros 

 Island. 



This species is closely allied to P. lai/i'tii/n-n, from which it differs in the greater length of 

 hydrocladial iuteruodes, number of internal ridges, and in having the hydrocladia in the same 

 plane. 



Type slides. Gat. Nos. 18609, 18C10, U.S.N.M.; Cat. Nos. 11721, 11722, Mus. State Univ. 

 Iowa ; also in the collection of the author. 



'Named in honor of the late Doctor G. Browu Goode, a man whose services to marine zoology wen- rio less pro- 

 nounced than the genial kindliness with which he assisted all workers with whom he came in contact. 



