82 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Sparnacian. This adaptation is not extraordinary since there are 

 also fresh-water bryozoa. 



The general aspect of this species is that of Electra, but Miss 

 Robertson mentioned a small ovicell "projecting over the zooecium 

 above almost to its pores". 



Occurrence. — D. 5235. Nagubat Island, east coast Mindanao; 

 9° 43' N.; 125° 48' 15" E.; 44 fathoms; sft. M., on floating algae. 

 Orissa coast at the mouth of Devi River, Bay of Bengal, 23-25 fathoms 

 (Robertson), on fragment of wood. 



Plesioty pes. —C&t. No. 7860, U.S.N.M. 



Genus PYRIPORA D'Orbigny, 1852 



Lang in 1914 and 1915, in his studies of the uniserial bryozoa of the 

 Cretaceous, created eight different genera taking into consideration 

 the angle of divergence, and the presence of granules or of a rhamma. 

 The angle of divergence is rather inconstant and varies a great deal 

 with the irregularities of the substratum. Granules and rhamma 

 are only exterior ornaments in connection with the single function of 

 calcification. We can not therefore recognize this new classification. 

 Without further study, Rhammatopora, Charixa and Distelopora 

 seem to be synonyms for ordinary Pyripora. Marssonopora Lang, 

 1914 in its ovicells is one of the Membraniporae near Callopora and 

 can be recognized for the special avicularia. Mystriopora Lang 1915, 

 can also be recognized provisionally because of its avicularia. Finally 

 Daeryopora, Lang, 1914, being operculated ought to be placed in the 

 vicinity of the Hippothoidae. 



PYRIPORA UNCIFERA, new species 



Plate 5, figs. 7-9 



Description. — The zoarium encrusts shells; the branches are uni- 

 serial and divide almost at right angles. The zooecia are large, 

 pyriform; the gymnocyst is short, convex, smooth; the mural rim is 

 thin and bears 4 or 5 pairs of small claws curved towards the interior; 

 the opesium is elliptical or oval. 



Measurements. — 



^ • lho = 0.20 mm. n • \Lz = 0.0b mm. 



Opesium -, Zooecium' 



Uo = 0.14mm. lZs-0.35 mm. 



Affinities. — This species is very well characterized by its small 

 areal claws; unfortunately photography is unable to figure them 

 adequately. We have observed a case of regeneration. 



Two living specimens show that the membraneous ectocyst does 

 not cover the gymnocyst. 



Occurrence. — D. 5217. Anima Sola Island, between Burias and 

 Luzon; 13° 20' N.; 123° 14' 15" E.; 105 fathoms; crs. gy. S.; 17.2°C. 



Cotypes.— Cat. No. 7861, U.S.N.M. 



