BRYOZOA OF THE PHILIPPINE REGION 125 



symmetrical. As in all the species of this genus there are larger 

 opesia (B) producing a false cellular dimorphism. 



Biology. — Almost all of our specimens were dead. This is a species 

 of rather shallow waters, 19 to 37 fathoms. It can live at greater 

 depth but it is very rare there. 

 Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 



20 fathoms; S. Sh. 

 D. 5141. Jolo Light, Jolo; 6° 9' N.; 120° 58' E.; 29 fathoms; 



co. S. 

 D. 5144. Jolo Light, Jolo; 6° 5' 50" N.; 121° 2' 15" E.; 19 



fathoms; co. S. 

 D. 5145. Jolo Light, Jolo; 6° 4' 30" N.; 120° 59' 30" E.; 23 



fathoms; co. S., Sh. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 



47' 10" E.; 21 fathoms; co. S., Sh. 

 D. 5151. Sirun Island, Sulu Archipelago, Tawi Tawi Group; 

 5° 24' 40" N.J 120° 27' 15" E.; 24 fathoms; co. 

 S., Sh. 

 D. 5179. Romblon Light, Romblon; 12° 38' 15" N.; 122° 12' 



30" E.; 37 fathoms; hard S.; 24.2° C. 

 D. 5577. Mount Dromedaria; north of Tawi Tawi; 5° 20' 36" N.; 

 119° 58' 51" E.; 240 fathoms; crs. S.; 12.4° C. 

 Cotypes — Cat, No. 7922, U.S.N.M. 



ONYCHOCELLA (?) INARMATA, new species 



Plate 12, figs. 9, 10 



Description. — The zoarium encrusts other bryozoa particularly 

 Adeonellopsis and Retepora. The zooecia are distinct, united by 

 their mural rim, elongated, oval, narrowed inferiority; the mural 

 rim is thin, salient, granular; the cryptocyst is of little depth, flat, 

 smooth. The opesium is semielliptical, very elongated, occupying 

 more than half of the zooecial length; the polypidian convexity is 

 very irregular, always dissymetrical and sometimes replaced by a 

 very salient and cxcentric serrate denticle; the opesiular indentations 

 are deep irregular, dissymetrical. The ovicell is endozooecial and 

 marked exteriorily by a simple cushion little salient and narrow. 



Measurements. — Zooecial length =0.45-0.55 mm. 



Variations and structure. — The micrometric measurements are 

 really so irregular that it is impossible to note them. The zooecia 

 are arranged in rather constant linear series; the primoserial zooecia 

 are small, while the initial zooecia of the series are very large. 



The characteristic of this species is the serrate denticle which 

 replaces sporadically the potypidian convexity. It resembles that of 

 Acanthodesia savarti Audouin, 1826, Acanthodesia limosa Waters and 

 Hemiseptella labiata Busk, 1885, but it is always eccentric. 



