NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 667 



to whether the family Entalophoridae should be maintained or whether 

 Entalophora should be considered a genus of the Tubuliporidae. On 

 the basis of the simple ovicell, alone, Entalophora would go very nicely 

 under Oncousoeciidae, but Bientalophora Borg, with an expanded ovicell 

 surrounding some peristomes, would necessarily be synonymous with 

 Diaperoecia Canu. As so few species are known perfectly I am leaving 

 the family to stand on the basis of the special zoarial character of a 

 round, erect stem, with peristomes opening on all sides. 



Genus ENTALOPHORA Lamouroux, 1821 



Zoarium slender, erect, usually only 4 to 8 series of zooecial tubes 

 constitute the stems and branches ; the embedded tubes are very elongate, 

 parallel, their peristomes curved sharply outward. Gonozoid simple, 

 elongate, sometimes only a little wider than the zooecial tubes, located 

 usually just below a bifurcation or near the end of a branch ; the ooecio- 

 pore terminal. Genotype E. cellarioides Lamouroux, 1821:81. 



Entalophora symmetrica new species 

 Plate 70, figs. 6 and 7 



The zoarium is thick-stemmed, about 1.50 mm in diameter, branched 

 twice dichotomously at about 90 degrees, the branches as thick as the 

 main stem. The secondary branches are at right angles to the primary 

 ones. The tubules are elongate and distinct, with well marked separating 

 grooves, the pores numerous and conspicuous; about 12 tubules surround 

 the stem equally on all sides and arranged more or less in quincunx. The 

 peristomes are moderately high, inclined distally, somewhat tapered 

 toward the tips and porous like the frontal for most of their length; 

 diameter of the aperture 0.15 to 0.17 mm. 



The ovicell is simple, pyriform, not extended between the peristomes, 

 moderately inflated, its surface smooth; the ooeciostome is terminal, 

 slightly elevated, more erect than the peristomes and slightly smaller, 

 its aperture rounded and 0.12 mm in diameter. 



This species has the zoarial form of a Bientalophora, but there are 

 no covering kenozooecia, the tubules are evident throughout their length, 

 and the gonozoid is of the simple type characteristic of Entalophora. 



Type, AHF no. 122. 



Type locality, Hancock Station 170-34, Stephens Bay, Chatham 

 Island, Galapagos, 0°47'30''S, 89°31'W, at 32 fms, one colony without 

 base. 



