*S'. F. Clark on Xew and Hare Species of JlydroiiU. 63 



Calycella syringa "incks. Peculiar variety. 



Plate X, figs. 1 , 2, 3. 



Sertularia syringa L'mn., Syst. 1311. 



Calicella syringa Hiucks, Oat. Devon Zooph., 23; Aim. N. 11. (3d .son), VIIT, 294. 

 Calycella syringa Hiueks, Jiritisli Hydroid Zoophytes, Vol. I, p. 206, Plate xxxix, 

 figs. 2, 2a. 



Stem simple, creeping, nearly smooth. HydrothecjB hyaline, color- 

 less or tinged with a light horn-color, cylindrical, romided oft" helow, 

 with an everted rim, to which is attached an opercnlnm consisting 

 of from five to eight segments and supported on twisted j)edicels of 

 considerable length, with eight to fifteen twists; some of the liydi'o- 

 theca' have an addition in the shape of a wide ring, ornamented with 

 from ten to fourteen longitudinal markings, which rises for some dis- 

 tance above the rim and on the summit of which there is borne 

 either the operculum or another ring ; in some cases there are as 

 many as four of these rings with an operculum at the summit. The 

 opercula usually point upward, but are occasionally deflected into 

 the ealycle. 



From Casco Bay, Me., 9 fathoms, — U. S. Fish Commission. 



Halecium articulosum, sp- nov. 



Plate X, fig. 6. 



Stem dark brown and tapering gradually, very stout, sparingly 

 branched, compound, consisting of many, slender, anastomosing, ser- 

 pentine tubes ; branches short and irregularly arranged on all sides of 

 the main stem ; branchlets few and very short ; both branches and 

 branchlets are divided into very short, stout internodes by distinct 

 joints placed at right angles to the stem ; branches and branchlets 

 simple, whitish, delicate, becoming more numerous toward the top of 

 the stem. The internodes become shorter very gradually toward the 

 ends of the branches and branchlets. Hydrothecte alternate, short 

 and wide, one to each segment ; some of them have a cup within a 

 cup, as is so often the case in the species of Halecium. Gonothecje 

 borne in rows on the upper side of the pinnae. The female gono- 

 thecaj are large, obovate, and have the opening on one side and 

 nearer the distal than the proximal end ; the male gonothecse are 

 oblong, subcylindrical, and, like the female, are sessile. Height of the 

 largest specimens, 5 niches (125'""'). 



Eastern end of Long Island Sound, 8-12 fathoms; Coxe's Ledge, 

 S. E. of Block Island, 17-21 fathoms; Casco Bay, Maine; Eastport, 

 Me., — U. S. Fish Commission. 



