238 BULLETIN 7 OF THE BUREAU OF FISHERIES. 



This is the Lepralia globifera of Packard which Verrill placed at one time tinder auriculata, but 

 later (1879) separated as Smittia globifera. The presence of a well-defined sinus seems sufficient to 

 place it in Schizoporella, and a comparison with European material of auriculata, as well as the study 

 of numerous specimens from this region indicates that globifera is not entitled to specific rank. 



Variations; border sometimes raised high above the cell, even higher than the avicularian promi- 

 nence; ooecia sometimes raised, again partly embedded; size showing considerable range even in the 

 same colony; avicularium varying slightly in size and in form of mandible, in fully calcified, fertile 

 cells the oral margin may be secondarily raised and a strong rib may extend from the ovicell around 

 to the avicularian prominence. 



Crab Ledge in 15 to 20 fathoms; Great Round Shoal in 8 fathoms; Nantucket Shoals in 18 to 25 

 fathoms; not uncommon. 



Schizoporella sinuosa (Busk). [PI. xxv, fig. 51, 5ia.] 



Busk 1860, p. 125 (Lepralia sinuosa'). 



Verrill iS79b, p. 193, and 18790, p. 30 (Escharina secundaria). 



Whiteaves 1901, p. 100. 



Cornish 1907, p. 77. 



Zoarium encrusting on stones and shells, forming dark reddish, purplish, or brownish colonies, 

 usually circular in outline. Zooecia ovate or rhomboid, usually sinuate at the border, which is not 

 raised except in very young cells; in the young stage, convex, but later immersed by calcification 

 in an almost even crust; punctured with small pores, surface rather regularly granular; orifice in young 

 cells subcircular, the posterior margin with a well-marked sinus, but with further calcification the 

 primary orifice is overgrown, becoming more or less orbicular with some indication of a sinus at the 

 posterior margin. Ooecia large, deeply immersed in the zoarium, somewhat flattened, with a rounded 

 pore at the top. Avicularia wanting. I have not seen the small avicularium which Hincks describes 

 as present in the variety armata. The variations seem almost entirely due to calcification. Taken only 

 at Crab Ledge where it occurs with some frequency in 15 to 20 fathoms. Not previously recorded south 

 of Canada. 



Genus CELLEPORA Fabricius (pars), 1780. 



This genus is easily distinguished among others of our region by the erected cells, coupled with the 

 presence of a sinus in the posterior margin of the orifice, and a large aviculiferous rostrum behind the 

 orifice. 



KEY TO SPECIES. 



Rostrum pointed, with the avicularium borne on one side at the base americana. 



Rostrum tall and spout-like, with a rounded avicularium at the top canaliculata. 



Cellepora americana, new species. [PI. xxv, fig. 52, 52a, 52b, pi. xxxi, fig. 99.] 



Verrill and Smith 1874, p. 714 (Cellepora ramulosa). 

 Verrill 18790, p. 30 (Cellepora atiicularis). 



Zoarium encrusting or rising into nodular branches a few millimeters in height, growing on hydroid 

 and Bryozoa stems, algae, etc., the colonies usually very irregular in form. Zooecia somewhat ovate or 

 pyriform, more or less erect, usually much crowded and irregularly disposed, heaped upon each other 

 and turned in various directions; punctured irregularly around the base, surface smooth and shining; 

 orifice subcircular with a V-shaped sinus in the posterior margin; peristome thin and raised, flaring some- 

 what outward, in fertile cells present on the sides only, where it projects in labiate processes; a promi- 

 nent mucronate rostrum just behind and often a little at one side of the orifice, which it overhangs to 

 some extent; an avicularium with an oval mandible is borne at the base laterally and somewhat inter- 

 nally. Ooecia rounded in outline, prominent, flattened above, smooth, with a number of punctures. 



This species is evidently related to C. amcularis Hincks, and shows this relation in the character of 

 the ovicell, the form of the sinus, the punctured surface, and the manner of growth. It presents a 

 number of important differences, however, such as the higher peristome which becomes bilabiate in the 



