BRYOZOA OF THE PHILIPPINE REGION 363 



escape of the larva; it is also the indispensable regulator for the size 

 of the minute drop of water which must penetrate into the compen- 

 satrix by the pseudorimule and the peristomial canalicule. Some 

 specimens were in reproduction in August 1909 (750 meters). 



The presence of the ovicells at the extremity of the young branches 

 indicate that the ovicclled zooecia form in order with their sex and 

 their ovicell and that there is no regeneration after the consolidation 

 of the skeleton. 



The zooecial vigor is to be noted on this species of very deep water; 

 it forms the largest cellules. 

 Occurrence. — 



D. 5202. Limasaua Island, Sogod Bay, southern Leyte; 10° 



12' N. ; 125° 04' 10" E. ; 502 fathoms; gy. m. ; 9.2° C. 



D. 5212. Panalangan Point, eastof Masbate Island; 12°04'15" 



N.; 124° 04' 36" E. ; 108 fathoms; gy. S. Sm. ; 12.4° C. 



D. 5219. Mompog Island, between Marinduque and Luzon; 13° 



21' N. ; 122° 18' 45" E. ; 530 fathoms; gn. M. j 10.4° C. 



D. 5511. Camp Overton, northern Mindanao; 8° 15' 20" N.; 



123° 57' E.; 410 fathoms; gy. ms.; 9.4° C. 



Cotypes— Cat. Nos. 8143, 8144, U.S.N.M. 



RETEPORA (RETEPORELLA) TENUITELIFERA, new species 



Plate 45, figs. 13-17 



Description. — The zoarium is free, ramose, dichotomous, com- 

 pressed; the fronds are short; their dorsal is ornamented with vibices 

 rather regularly arranged on each side of an axial thread; the base is 

 small, concave, attached to a small solid body. The zooecia are 

 distinct, separated or not by a salient thread, a little elongated, 

 irregular; the frontal is smooth and convex; it bears in the vicinity 

 of the apertura a long and very thin, oblique avicularium ; the peristome 

 is scarcely salient and is indented in front by a rather regular pseudor- 

 imule. The ovicell is small, convex, smooth, adorned with a small 

 median fissure. 



Measurements. — 



Pcristomice^ = ' 12 ™- Zooecia(f z ^i 5 " - 40 mm ' 



lip -0.12 mm. \lz =0.20 mm. 



Variations. — The zooecia are marginated only in the young 

 branches; on the others the peristomice is buried, the oral avicula- 

 rium is less visible because it opens perpendicularly to the zooecial 

 piano and the zooecia are indistinct. On certain specimens the 

 large oral avicularium covers a part of the frontal. 



Affinities. — This species differs from Reteporella spinosissima and 

 from R. clypeata in the constant presence of the oral avicularium. 

 It differs from Reteporella dendroides Ortmann, also with an identical 



