BRYOZOA OF THE PHILIPPINE REGION 325 



tremopores and with a small triangular mucro above the apertura. 

 The apertura is deep, placed at the front of a peristomie formed by 

 the thickening of the frontal; it is semielliptical, with a very concave 

 proximal border and two small cardelles placed very low. Two small 

 avicularia with pivot are arranged symmetrically on each side of the 

 apertura. 



Measurements. — 



ADertura! Aa = - 12 mm> Zooecia! Z2 = - 80 " - 85 mm ' 



Ua = 0.17mm. lZ2 = 0.60 mm. 



Affinities. — The operculum exhibits the two small linear attach- 

 ments of Hippodiplosia, because of which we class this species in this 

 genus, although, since we do not know the ovicell, our arrangement 







A b u 



Fig. 133. — Opercula of Hippoporae, X85 



A. Hippodiplosia baculina, new species. B. Hippoporina fallax, new species. 

 C. Hippoporina planulata, new species. 



is doubtful. The species is very well characterized by its zoarial 

 form; unfortunately it is very rare. 

 Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 20 



fathoms; S. 

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

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

 Cotypes.—C&t. Nos. 8089, 8090, U.S.N.M. 



Genus CRYPTOSULA Canu and Bassler, 1925 



There is no external ovicell; the egg evolves in the interior of a 

 membranous pocket formed by a dorsal evagination of the subdia- 

 phragmatic part of the sheath. The frontal is a tremocyst. The 

 operculum bears two linear muscular attachments very close to the 

 edge; 16, 18 tentacles. 



Genotype. — Cryptosula (Eschara) pallasiana Moll, 1803 (not 

 Ilincks, 1880). 



Range. — Recent. 



History. — Our description of the genus Hippodiplosia Canu, 1916, 

 given in 1920 (p. 393) was based on the figure given by Hincks, 

 1880, n of Lepralia pallasiana from Madeira. This is not Eschara 

 pallasiana Moll, 1803, which is never ovicelled and in which the poster 



" Annals and Magazine of Natural History, p. 9 (sep.), pi- 10, fig. 3. 

 2182—29 22 



