350 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



has passed into synonymy (Osburn, 1910) we can preserve the name 

 of Waters, 1908, for the species. 



Biology. — Our living specimens were in reproduction and fixation 

 in July, 1909. Some specimens from Mount Dromedario encrust 

 Retepores. 

 Occurrence. — 



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



57 fathoms; Sh. (common). 

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

 58' 51" E.; 240 fathoms; crs. S.; 11° C. 

 Plesiotypes — -Cat. No. 8128, U.S.M.N. 



SMITTINA NITIDA DELICATULA Busk, 1883 



Plate 42, figs. 5, 6 



1885. Mucronella delicatula Busk, Polyzoa collected by Challenger Scientific 

 Results Voyage Challenger, vol. 10, p. 196, pi. 18, fig. 2, 



1S89. Smittia Irispinosa var. delicatula Waters, Supp., Report Polyzoa collected 

 by Challenger Scientific Results Voyage Challenger, vol. 31, p. 24, pi. 3, 

 fig. 26. 



Measurements. — 



. [^ =0.09 mm. ~ . \Lz -0.40-0.50 mm. 



Penstomice 7 n „„ ZooeciaL ^ „^ 



lip -0.12 mm. Xlz -0.30-0.40 mm. 



The apertura is transverse; the peristome does not bear a pseudori- 

 mule; the proximal border is straight or a little convex. The zooecia 

 are rectangular. The small avicularia are elliptical or triangular, the 

 beak turned towards the base; they are placed in the vicinity of the 

 aperture, and little distant from the separating thread of the zooecia. 

 The frontal is finely granular. The lyrula is broad. 



This variety is little different from variety nitida figured by Verrill, 

 1875; it is simply more regular and the avicularia are placed a little 

 lower. The ovicell measuring 0.40 mm is larger than in the variety 

 nitida, Hincks, 1881. This simple character indicates to us clearly 

 that the species is not Smittina trispinosa in spite of the very small 

 frontal granulations. We have made a variety of Smittina nitida, 

 Waters, 1908, of which it has the essential characters. Our speci- 

 mens are unilamellar and dead. 



Occurrence. — D. 5235. Nagubat Island, east coast of Mindanao; 9° 

 43' N.; 125° 48' 15" E.; 44 fathoms; sft. M. 



Geographic distribution. — Pacific: Honolulu, 20-40 fathoms (Busk). 



Plesiotypes— -Cat. No. 8129, U.S.N.M. 



SMITTINA TRIPORA, new species 



Plate 42, figs. 7-9 



Description. — The zoarium is unilamellar or encrusting. The 

 zooecia are distinct, separated by a little salient thread, more or less 

 elongated, transverse on the zoarial margin, rectangular; the frontal 



