NO. 1 eraser: hydroids 17 



Bimeria vestita Wright 



Binierta vestita Wright, Edinburgh N.P. Jour. (N.S.), 1859, p. 109. 

 HiNCKS, British Hyd. Zoophytes, 1868, p. 103. 



Distribution. — San Francisco Bay, 2 fathoms; east of islands ofif 

 Navidad Head, 25-35 fathoms. 



Genus BOUGAINVILLIA 



Bougainvillia crassa, new species 

 Plate 3, Fig. 11 



Trophosome. — Stem coarse, fascicled, reaching a height of 6 cm. ; 

 branches slender as compared with the stem, some of them fascicled in 

 the proximal portion; large branches somewhat regularly arranged, 

 with smaller branches between less regularly placed; ultimate branch- 

 lets numerous, giving the whole colony a flabellate appearance. Stem, 

 branches, and branchlets somewhat wrinkled but not annulated. Hy- 

 dranths small, with 8-10 tentacles. 



Gonosome. — Medusa-buds appear singly, attached by short pedicels 

 to the ultimate branchlets. 



Distribution. — Santa Elena Bay, at low tide, in 7-8 fathoms and in 

 10-12 fathoms; Port Culebra, 3-10 fathoms; Tangola-Tangola, 15-20 

 fathoms. 



Genus PERIGONIMUS 



Perigonimus repens (Wright) 



Eudendrium repens Wright, Proc. Roy. Phys. Soc. Edinburgh, 1858, 



p. 448. 

 Atractylis repens Wright, ibid., p. 450. 

 Perigonimus repens Eraser, Hyd. of Vancouver Island, 1914, p. 120. 



Distribution. — Off Clipperton Island, 65 fathoms; Tagus Cove, 

 10-18 fathoms and in 70 fathoms; Post Office Bay, 10-15 fathoms; 

 Cartago Bay, 8-12 fathoms; between Charles and Indefatigable islands, 

 60 fathoms; Gardner Bay, 25-35 fathoms; Santa Elena Bay, 10-12 

 fathoms; Port Culebra, 3-10 fathoms; Isabel Island, 10-25 fathoms; 

 Santa Maria Bay, 10 fathoms. 



PPerigonimus robustus, new species 

 Plate 3, Fig. 12 



Trophosome. — Colony slender, unbranched, reaching a height of 

 60 mm. Stem continuous throughout but not very straight or rigid; 



