BRYOZOA OF THE PHILIPPINE REGION 423 



condition; it probably did not live at this depth. The specimen 

 from the Gulf of Davao does not bear large beaks and its determina- 

 tion is doubtful under these circumstances. We think that this 

 species can prosper only in warm, calm waters and at shallow depths. 

 Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 4' 25" N.; 120° 58' 30" E.; 20 



fathoms; S., Sh. 

 1). 5147. Siilade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 



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

 D. 5140. Sirun Island, Sulu Archipelago; 5° 33' N.; 120° 42' 



10" E.; 10 fathoms; co. Sh. 

 D. 5251. Gulf of Davao, Linao Point; 7° 05' 12" N.; 125° 39' 



35" E.; 20 fathoms; co. S. 

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

 X.; 110° 58' 51" E.; 240 fathoms; crs. S.; 12.4° C. 

 Cotypes.— Cat, Nos. 8234-8236, U.S.N. M. 



HOLOPORELLA SERRATIROSTRIS MacGillivray. 1884 



Plate 61, figs. 7-10 



1884. CeUepora serratirostris MacGillivray, Descriptions of new or little known 

 Polyzoa. Part 8, Proceedings Royal Society Victoria, vol. 21, p. 9, 

 pi. 3, fig. 4. 



1 886. CeUepora serratirostris MacGillivray, Bryozoa in Prodromus Zoology Vic- 

 toria, decade 13, p. 109, pi. 128, fig. 2; pi. 168, fig. 13. 



l v ^7. t'dlepora serratirostris MacGillivray, Catalogue marine Polyzoa of Vic- 

 toria, Trans. Royal Society Victoria, vol. 23, p. 29. 



18S9. CeUepora serratirostris Jelly, Synonymic Catalogue of Marine Bryozoa, 

 p. 59. 



.Measurements. — 



. , (k-0.12mm. Zooecia \Lz =0.60-0.70 mm. 



Apcrtura , . ..{_ 



I l<t =0.15 mm. (marginal) \lz -=0.50 mm. 



Maximum length of zoarial avicularium = 0.75 mm. 



Structure. — The zoarium is a free globular, mass or a convex, 

 irregular expanded lamella; its color is brown. The aperture bears 

 in its proximal portion a small lyrula and two very fragile cardelles. 

 The avicularian beak is oblique and very salient; it persists with the 

 aperture, on the deep zooecia but it is elongate and becomes cylin- 

 drical and opens at the same level as the avicularia of the superficial 

 zooecia. The interzooecial avicularia are quite variable in form and 

 position; the more characteristic ones have a deep mandibular cavity 

 surrounded by a serrate wall. On each side of the apcrtura there is 

 a long peristomial spine the extremity of which can reach the aperture 

 of the distal zooecium. The frontal is finely granular especially on 

 the distal zooecia. 



The zoarial avicularia are more numerous in the zoarial portions 

 where the zooecia are deprived of the avicularian beak. The hitter 



