414 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 4' 25" N.; 120° 58' 30" E. 



20 fathoms; S. Sh. 

 D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121° 02' 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; 5° 24' 40" N.; 120° 



27' 15" E.; 24 fathoms; co. S., Sh. 

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



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

 D. 5217. Anima Sola Island, between Burias and Luzon; 

 13° 20' N.j 123° 14' 15" E.; 105 fathoms; crs. gy. S. 

 D. 5235. Nagubat Island, east coast of Mindanao; 9° 43' N.j 



125° 48' 15" E.; 44 fathoms; sft. M. 

 D. 5255. Dumalag Island, Gulf of Davao; 7° 3' N.; 125° 39' 



E.; 100 fathoms; sft. M. 

 D. 5478. Tacbuc Point, Leyte; 10° 46' 24" N.j 125° 16' 30" 



E.; 57 fathoms; Sh. 

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

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

 Geographic distribution. — Eastern Atlantic, Madeira, 70 fathoms; 

 western Atlantic, Bahamas; Gulf of Mexico, Habana, 193 fathoms; 

 Florida, 42 fathoms; Tortugas, 8-42 fathoms; western Pacific, 

 Philippine Islands, 20-240 fathoms; eastern Pacific, Hawaiian 

 Islands, 91-406 meters, 20.5° C.; Indian Ocean, Mauritius, 10 miles 

 off Gable; Manaar, 34 fathoms; Providence, 50-70 fathoms; Gimsah 

 Bay, Gulf of Suez; Siam 



Plesiotypes — Cat. Nos. 8221-8224, U.S.N.M. 



MASTIGOPHORA GRANDICELLA, new species 



Plate 58, figs. 1-3 



Description.— The zoarium encrusts shells. The zooecia are 

 distinct, separated by a deep furrow, large, elongated, elliptical, 

 arranged in linear series, bi or multiserial; the frontal is formed of a 

 detachable tremocyst with very small pores arranged on a perforated 

 olocyst* The aperture is small, semilunar, with a very narrow linear 

 rimule; the peristome is thin, ver} r little enlarged proximally and 

 bears 6 spines. Two small triangular avicularia with pivot are 

 adjacent to the peristome. The ovicell is small, recumbent, closed 

 by the operculum. 



Measurements. — 



Apertura (includ-|/i, a = o.l5 mm. r ■ (££=100 mm. 



ing rimule) j?a = 0.12-0.15 mm. Zooecm |^ = 0.70 mm. 



