528 PROCEEDINGS OF THE NATIONAL MUSEUM. tol.54 



Quadriradiates of ascon tubes (&) nearly similar to the above tri- 

 radiates except in the presence of apical ray. This is much shorter 

 and slightly thinner than facial rays, gradually tapering and sharply 

 pointed, slightly curved upwards, 40-60/^ long and %fi thick at base. 



Oxea of ascon tubes (c) with distinct sharply pointed lance head, 

 more or less curved, broadest at the lance head, TO-OOfi, long and 

 S\}. broad at head. 



Triradiates of the lining layer of pseudogaster (d) strongly 

 sagittal, with paired rays much longer than basal ray and standing 

 nearly at right angles to the latter. Basal ray straight, sometimes 

 slightly thinner than paired rays, 60-90tJ, long and 8[i. thick at base. 

 Paired rays nearly straight except for the slight curvature at base, 

 rarely crooked, gradually tapering to sharp point, 130-240[ji. long 

 and 8-12[i, thick at base. 



Quadriradiates of the lining layer of pseudogaster (e) nearly 

 similar to the triradiates just mentioned, but with a short slender 

 curved apical ray of 40-60pL length and 6-8[j, thickness at base. 



Localities. — Off the north point of Copper Island, Comandorski 

 Islands (Station 4788, 57 fathoms; Station 4789, 56 fathoms). 



Remarks. — This species can not be identified with any species 

 already known of the genus. The canal system of the reticulate 

 type D^ and the sagittal triradiates and quadriradiates in the lining 

 layer of pseudogaster appear to be characteristic to it. The oxea 

 closely resemble those of Leucosolenia variabilis Haeckel, L. hotry- 

 oides (Ellis and Solander), etc. The other specimen from station 

 4789 alluded to above is entered under Cat. No. 9180, U.S.N.M. 



2. LEUCOSOLENIA CANARIENSIS (Michlucho-Maclay) . 



Plate 84, fig. 2. 



Nardoa canariensis Michlucho-Maclat, Jenaische Zeitsclir., vol. 4, 1S68, p. 230. 



Nardoa sulphurea Michlucho-Maclay, Jenaische Zeitschr., vol. 4, 1868, p. 230. 



Nardoa rubra Michlucho-Maclay, Jenaische Zeitschr., vol. 4, 1868, p. 230. 



Tarroma canariense Haeckel, Prodromus, 1870, p. 244. 



Tarroma rubruni Hx\eckel, Prodromus, 1870, p. 245. 



Ascaltis canariensis Haeckel, Kalkschwamme, 1872, p. 52, pi. 9, figs. 1-3 ; pi. 10, 



figs. 1, a-c. 

 Ascaltis compacta Schuffnek, Jenaische Zeitsclir., vol. 11, 1877, p. 404, pi. 25, 



fig. 9. 

 Leucosolenia nanseiii Beeitfuss, Zoologische Anzeiger, vol. 19, 1896, p. 427 ; 



Zoologische Jahrb. Syst., Abt. 10, 1898, p. 106, pi. 12, figs. 1-9. 

 Leucosolenia canariensis Lakschewitsch, Zoologische Jahrb.. vol. 1, 1880, p. 



300, pi. 7, fig. 1.— Thacker, Proc. Zool. Soc. London, 1908, p. 762, pi. 40, fig. 3, 



text-figs. 157-160.— Dendy and Row, Proc. Zool. Soc. London, 1913, p. 724. 



The collection contains a single specimen of this species (Cat. No. 

 9181, U.S.N.M.). The sponge (pi. 84, fig. 2) consists of a massive 



1 Dendy, A. A Monograph of the Victorian Sponges, Pt. I. The Organization and 

 Classification of the Calcarea Homocoela, with descriptions of the Victorian Species. 

 Trans. Roy. Soc. Victoria, vol. 3, No. 1, 1891, pp. 30-32. 



