NO. 1 FRASER: HYDROIDS 39 



nite lines run from the indentations between the teeth backward to- 

 ward the base. 



Gonosome. — Gonangia arising singly or in pairs from the hydro- 

 thecal axils, small and slender for their length, 0.7 mm. long, 0.1 mm. 

 in diameter, tubular, some of them with a definite collar at the distal 

 end. The distal half may be slightly annulated or corrugated. The 

 blastostyle is present in the basal portion only; the medusa-buds are 

 liberated from the end of this to form a single linear series in the 

 gonangium. Medusa with 12 tentacles at time of liberation from the 

 gonangium. 



Distribution. — Santa Elena Bay, low tide to 12 fathoms; off Morro 

 de Petatlan, 10-15 fathoms; off Tenacatita Point, 10 fathoms; South 

 Bay, Cerros Island, 10-15 fathoms. 



Genus SILIGULARIA 



Silicularia pedunculata (Jaderholm) 



Campanularia pedunculata Jaderholm, Archives de Zool. Exper. et 



Gen. (4), III, 1904, p. vi. 

 Silicularia divergens Hartlaub, Die Hyd. der magalhaensischen Re- 

 gion, 1905, p. 578. 



Silicularia pedunculata Jaderholm, Hyd. aus Ant. Meere, 1905, p. 18. 

 Distribution. — It is difficult to believe that this South Georgia and 

 Tierra del Fuego species would inhabit the Secas Islands area, but the 

 trophosome (no gonosome is present in the specimens) agrees so exactly 

 with Jaderholm's description and figures that it is impossible to ignore 

 the resemblance. 



Family Gampanulinidae 



Genus GAMPANULINA 



PGampanulina ramosa, new species 

 Plate 9, Fig. 43 



Trophosome. — Colony small, largest 7 mm., for the size of it, ex- 

 tensively branched dichotomously ; entirely without annulations or with 

 but slight indications of such. Hydrotheca with 10 segments in the 

 operculum. 



Gonosome. — Not obsei'ved. 



Distribution. — Tagus Cove, 30 fathoms; between Charles and Inde- 

 fatigable islands, 60 fathoms. 



