BRYOZOA OF THE PHILIPPINE REGION 367 



Biology. — Our specimens from Borneo were living. They were in 

 reproduction and fixation in September, 1909 (69 meters). The speci- 

 mens from shallow waters show no noticeable difference from the 

 specimens of greater depths. 

 Occurrence. — 



D. 5135. Jolo Light, Jolo; 6° II' 50" N.; 121° 08' 20" E.; 16 



fathoms; fine co. S.; 11.3° C. 

 D. 5151. Sirun Island, Sulu Archipelago; 5° 24' 40" N.; 120° 27' 



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

 D. 5577. Mount Dromedario, Tawi Tawi; 5° 20' 36" N.; 119° 



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

 D. 5593. e Mount Putri, Sibuko Bay, Borneo; 4° 02' 40" N.; 118° 

 11' 20" E.; 38 fathoms; fine S. (common). 

 Cotypes — Cat. Nos. 8149-8151, U.S.N.M. 



RETEPORA (RETEPORELLA) MILLESPINAE, new species 



Plate 47, figs. 1-11 



Description. — The zoarium is free, dendroid, dichotomous; the 

 fronds are wide, covered at a maximum by 8 longitudinal rows of 

 zooecia ; the base is thick, little expanded, concave, attached to small 

 pebbles; the dorsal is ornamented with oblique vibices arranged on 

 each side of a longitudinal sinuous thread; each irregular lozenge 

 shaped area is very finely granulated and bears 2 or 3 large hollow 

 tuberosities. The zooecia are distinct, separated by a little salient 

 and little visible thread, enlarged distally; the frontal is smooth and 

 decorated inferiorily by a small poriform avicularium placed on the 

 median zooecial axis. The peristome is little salient; it is formed by 

 two large lateral tuberosities and by a salient avicularian umbo, 

 oblique, arranged on the side of an irregular pseudorimule; some spines 

 are attached here and their ensemble on the zoarium give to the latter 

 the aspect of being covered with a large number of spines. The 

 spiramen fissure is placed on the frontal. The ovicell is very small, 

 convex, deeply buried, with a small median cleft. 



Measurements. — 



ry „ • Ii2 = 0.40mm. „ . . 



Zooecia, rt _„ Peristome =0.25 mm. 



Uz = 0.25 mm. 



Apcrtura (interioD^jO^ 7 ™™; 



Variations. — The dorsal tuberosities are very irregular in their 

 arrangement; on the young branches they are grouped in the vicinity 

 of the median axis; on the adult branches the vibices are more 

 numerous, arranged without symmetry and the tubercules are irregu- 

 larly distributed over all the zoarial surface; finally on the basal 

 branches on the primitive trunk, the dorsal is very thick and smooth. 



