450 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



they are inconspicuous and rounded. In that from D5593 they are 

 conspicuous, narrow, sinuous canals, about 1 mm. wide, and about 

 10 mm. apart, which anastomose to form a coarse network. In the 

 specimen from D5252 these spaces for the most part are rounded and 

 separate, but there are also narrow, subdermal, tangential channels 

 as in the sponge from 5593. The various appearances, including that 

 of Sollas' specimens (Sollas, 1888, p. 285), seem to be due to the 

 degree in which conspicuous tangential canals are developed inter- 

 connecting the subdermal mouths of the canals which penetrate the 

 interior. 



In details of surface appearance, including the color, which is 

 lighter, the specimens from D5252 and D5593 resemble one another 

 more than they do those from D5218 and, as will be seen below, this 

 is true also for the microstrongyles. 



The skeletal measurements are close to or within those recorded 

 by Lendenfeld for the species. In the desma the clads are 30-40 \l 

 thick, 200-250 jx long if simple, but sometimes bifurcating. Zygosis 

 terminal. 



In the phyllotriaene the rhabdome, 80-130 \i long, 12-20 |x thick, 

 tapers to a point, sometimes strongylate. Clads, if simple, 200-300 \i 

 long, commonly 12-16 jx wide (width varies from 8 to 20 jx). In a 

 selected characteristic bifurcate clad, primary branch (protoclad) 

 was 70 [x long, secondary (deuteroclad) 200 [x long. In another the 

 protoclad was 105 [x long, the deuteroclads 110 and 50 fx long. The 

 spicules, as said, are very variable. 



Skeletal rhabds, strongylate or very slightly tylote at the ends, 

 400-500 by 8 [x, in bundles, some of them radial to the surface, and 

 scattered through the interior. Very abundant in the neighborhood 

 of the osculum, beyond the limits of the desmas. 



Microstrongyles in the specimens from D5218, 20-24 by 3 {x; in 

 those from D5593 and D5252, smaller, only 12 by 2-3 [x; in all, 

 curved or bent as usual, the surface roughened in a feebly spinose 

 fashion. The range for the previously recorded specimens is 15-30 

 by 2-3.9 [x (Lendenfeld, 1903). 



The species has been recorded from the neighborhood of Ternate, 

 Celebes, Amboina, Manila, and Formosa. 



THEONELLA SWINHOEI Gray. Tar. VERRUCOSA, new variety. 



Plate 43, fig. 1 ; plate 40, fig. 10. 



One (dried) specimen from D5356. 



The sponge here recorded differs from the type in two features, 

 precise enough for use in classification. The epactines of the desmas 

 are not smooth as in the type, but verrucose with low conical 



