328 



HKLLKTTN OK THE UNITKD STATES FISH OOMAUhSiUN. 



Iris ami pi-diivls; branches and pedicels often annotated at their origins. Hydranths \vitli fusiform 

 bodies and 16 to 20 scattered filiform tentacles. 



t.'iiiiiixiiiiif. Gonophores ovate, invested in a gonH&ghim-like extension of perisarc, borne on the 

 branches an<l hydrant!) pedicels near their bases. Pedicels of gonophoret very short and annulated. 



l>ixti-!liiit!<in. Found in a fresh-water pond near the bathing beach at Woods Hole, Mass. 



This species is reported from the Woods Hole region just as these pages are going to press. The 

 figure ami description are from specimens collected by Prof. A. I). Morrill and kindly forwarded to me 

 by Dr. Charles llargitt. 



yne mirabttis (Ag.). A. Sessile medusa ( 9 ) 

 B. Sessile medusa (<f ). 



SYNCORYNin^E. 



<sj 



4. Gtrifniiis ngaKsizu McCr. 

 (After Murbaeh.) 



Trophosome. Hydranths with capitate tentacles only, scattered over the 1 eliktgated body or 

 growing in more or less distinct verticils. 



Oonosome. Gonophores usually borne above the bases of the proximal tentacles, and producing 

 attached or free medusse with 4 radial canals and 4 tentacles with bulbous- bases, and a deep bell. 



Key to genera of Syncorynidx found in the Woods Hole: region. 



A chitlnous perisare investing the stem. Hydranth body shorter than stem when .expanded Syncoryne. 



No chitinous perisarc. Hydranths sessile, with long cylindrical bodies Corynitit. 



SYNCORYNE. 



Trophosome. Hydrocaulus well developed, often branched and more or less annulated. Hydranths 

 with numerous stout capitate tentacles and terete bodies. 



Gonosome. Medusse as described above, bulbous bases of tentacles often with dark eye-spot. 



