56 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



abundant on rocks along shore in the region of Monterey Bay and at La 

 Jolla, California. Also, Gulf of Panama, Galtsoff collection on pearl 

 oysters. 



Cauloramphus echinus (Hincks), 1882 

 Plate 5, fig. 8 



Membranipora echinus Hincks, 1882 :250 ; 1884:8. 

 Cauloramphus echinus, O'Donoghue, 1926 :39. 



Resembling C. spiniferum (Johnston) but much smaller with shorter 

 and more slender spines ; the zooecia more separated ; the avicularia are 

 shorter, more bulbous, with shorter stalk, and the rostrum is more strong- 

 ly hooked. The opesia measures 0.25 to 0.30 mm in length. The stalked 

 avicularia are less numerous than in spiniferum. The full complement of 

 spines is about 8 on each side, the terminal ones directed forward, the 

 next two pairs more or less erected, and the remainder bending over the 

 opesia ; all of the spines are more slender than those of spiniferum. 



Described by Hincks from the Queen Charlotte Islands and recorded 

 by O'Donoghue from numerous localities in the Vancouver Island re- 

 gion, low tide to 30 fms. 



The above comparison is from a specimen in the author's collection, 

 "Virago Sound, British Columbia, Queen Charlotte Islands, 8-15 fath., 

 G. M. Dawson," and is no doubt from the same material as Hincks' type. 



Hancock Station 1281-41, east of Santa Rosa Island, California, 23 

 fms. Also collected at Tomales Bay, California, R. J. Menzies, collector. 



, i Cauloramphus brunea Canu and Bassler, 1930 

 Plate 5, fig. 6 



Cauloramphus brunea Canu and Bassler, 1930:10. 



The zoaria are small, encrusting shells, pebbles and corallines. The 

 zooecia are comparatively small, averaging 0.45 mm long by 0.35 mm 

 wide; the separating grooves very broad so that the opesia are about as 

 far apart as their own width. The mural rim is elevated and thick; the 

 opesia elliptical, about 0.30 mm long by 0.15 mm wide; the descending 

 cryptocyst granulated. A closely set row of spines surrounds the whole 

 opesia; the distal 4 or 6 are longer and more erect, projecting somewhat 

 forward; the remaining ones, 4 to 6 on each side, are smaller, more 

 sharply pointed, and curve rather high over the opesia. The stalked 

 avicularia, which are not abundant, are slender and elongate, the pedicel 

 often longer than the expanded portion. 



