MAEINE DIATOMS OF THE PHILIPPINE ISLANDS 35 



BIDDULPHIA BROECKII (Leuduger-Fortmorel) Mann 



(Schmidt, Atlas, pi. 82, figs. 10, 12, 13.) 



The spelling of the specific name broolcei by Schmidt is incorrect. 



BIDDULPHIA CAMPECHIANA (Grunow) Boyer 



(Cleve, Diat., W. I., p. 16, pi. 5, fig. 28.) 



As the name indicates, this is another Campeche Bay species. 



BIDDULPHIA CASTELLIFERA (Grunow) Mann 



(Schmidt, Atlas, pi. 128, figs. 8, 17-18.) 



BIDDULPHIA CINGULATA, new species 



Plate 7, figs. 5-6 



Valve broadly elliptical with pointed ends; the rim (the margin 

 which joins the girdle of the frustule) is undulating, and marked 

 with delicate, widely separated cross lines; the central part of the 

 valve, raised above the rim, is ornamented with orderly rows of beads 

 running longitudinally but converging toward the bases of the two 

 horns that arise at the ends of this elevated central part of the valve; 

 a broad band bounded by a delicate hyaline line crosses the valve 

 transversely, with a strong erect spine set near each end of it, a fine 

 hyaline line connects the two spines and thus bisects the band; in 

 side (or girdle) view each valve shows two Very long outwardly curv- 

 ing hyaline horns, their globular ends bent outward; the undulating 

 rim extends beyond the rest of the valve, which is separated from it 

 by a narrow hyaline space and is rounded out on each side into two 

 " cheeks ." In some specimens the beading is sparsely sprinkled with 

 fine prickles, best seen in side view. The girdle is narrow and cov- 

 ered with closely set rows of transverse beading. 



Length of valve (including rim), 0.082 to 0.169 mm.; width 

 0.056 to 0.135 mm.; height of frustule, with horns, 0.110 mm. 



Type.— Cat. No. 43588, U.S.N.M. 



BIDDULPHIA CONCAVA, new name 



(Schmidt, Atlas, pi. 84, fig. 17, misnamed.) 



This evident BiddulpMa is well illustrated in the above reference 

 where it bears the name Triceratium japonicum A. Schmidt. Its 

 transfer to BiddulpMa with that specific name is impossible because 

 of B. japonica Castracane (Challenger Exp., pi. 23, fig. 14) Tricera- 

 tium concavum Bailey (Wilkes Exp., pi. 9, figs. 24-26) not being 

 a true BiddulpMa, but belonging to the genus Trigonium, would not 

 affect the validity of the above name. This species has a merely 

 general resemblance to BiddulpMa ( Triceratium) scitula (Brightwell) . 

 Schmidt's specimen came from the not far distant Yokahama, Japan. 



