6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. QI 



are external openings, apparently pores, about lOO ;«, in diameter. The 

 oscules were not found, perhaps having occurred on the portion of the 

 specimen not collected. The internal structure is clearly radiate, the 

 spicules being optically evident. The megascleres are large oxeas, 

 70 fi by 3,000 fji in size, and from that up to at least 12 mm long. Some, 

 which are possibly to be regarded as in a separate size category, are 

 only about 10 /a by 210 ju,. There are dichotriaenes with rhabds about 

 50 fxto 100 IX, total length to be measured in terms of millimeters. The 

 microscleres comprise metasters about 30 [x in greatest extent, with 5 

 to 15, usually about 8 or 9, rays. There are also once-bent rhabds 

 with oxeote ends, total length about 40 fi ; these may be interpreted as 

 asters from which all but two rays have been lost. 



An interesting species to compare here is PacJiastrella fusca Leb- 

 wohl (1914, p. 82), a Japanese sponge that should be transferred to 

 the genus here established. This has roughened microrhabds and two 

 sizes of metasters, but otherwise resembles A^. enae closely. The genus 

 can not only be compared to Thenea, which has euasters in addition to 

 the spiculation of this genus, but also to Vuhanella SoUas, which has 

 similar spiculation but has calthrops added. 



The species is named for Ena Douglass, who accompanied the 

 expedition. 



KAPNESOLENIA, n. gen. 



This genus resembles Tethyopsls Stuart, which, however, lacks the 

 dichotriaenes and has euasters, and Monosyringa Brondsted, which 

 also has distinctive euasters. 



Genotype and only species. — Kapnesolenia fisheri, new species. 



KAPNESOLENIA FISHERI, n. sp. 



Holotype. — U.S.N.M. no. 22370; from station 99, latitude i8°39' 

 30" N., longitude 64°56'oo" W. to latitude i8°4o' N., longitude 64° 

 51' W., March 3, 1933, 180 to 200 fathoms. 



At least two specimens of this sponge were taken at this station, 

 and judged from the fragments, an indeterminate number of addi- 

 tional ones. The principal mass is an almost perfect sphere about i cm 

 in diameter, from which extends just one chimney like hollow tube 

 with paper-thin walls, the total length reaching 8 cm. The color is 

 white and the consistency cartilaginous. The surface is smooth, and 

 the structure of the spherical portion is conspicuously radiate. On the 

 surface it bears pores visible to the naked eye, minute and occurring 

 about 5 to the square millimeter. Abundant dichotriaenes are present 



