SILICIOUS AND HORNY SPONGES WILSON. 327 



More recently (1916, 1916&) Dendy would merge these forms, which 

 are generally recognized as reduced Astrophora, in the Stellettidae, 

 possibly some of them in the Pachastrellidae (Theneidae of this 

 report). In this, I prefer not to follow him. 



In addition to the genera represented in the collection, Asteropus, 

 J as pis (plus Coppatias), and Spongosorites, the family includes the 

 following: Amphius Sollas, 1888, Gryptotethya Dendy, 1905, Diastra 

 Row, 1911 (merged by Dendy, 1916, in Aurora), Topsentia Berg, 

 1899 (for Anisoxya Topsent, see Topsent, 1900, p. 2), Trachycladus 

 Carter, 1879, Raphidistia Carter, 1878, Spiroxya Topsent, 1896 

 (emended 1900), Holoxea Topsent, 1892, Melophlus Thiele, 1899. 

 Topsent, 1919, moves Hemiasterella Carter (syn. Epallax Sollas, 

 1888, Kalastrella Kirkpatrick, 1903), transferring it to the Axinel- 

 lidae alongside of Adreus Gray and Vibulinus Gray (see Astraxinel- 

 lidae) ; Dendy (19215, p. 144) places the genus in the Spirastrellidae. 



Rhabdastrella Thiele (1903, p. 934) is merged in Jaspis. By 

 Dendy, 1916, this genus is merged in Aurora. 



Magog Sollas (1888) has been deleted. (See Dendy, 1916.) 



Dorypleres Sollas (1888) is merged in Jaspis. (See discussion in 

 Lindgren, 1898; Topsent, 1898; Thiele, 1900, p. 58). 



Astropeplus Sollas (1888) is merged in Jaspis. (See Topsent, 

 1898; Dendy, 1916.) 



Genus ASTEROPUS Sollas (1888). 



Asteropus Sollas, 18S8, p. 205. 



With diactinal magascleres (oxeas). Microscleres include both 

 euasters (oxy asters) and sanidasters. 



ASTEROPUS SIMPLEX (Carter). 



Plate 38, fig. 4. 



Stellcttiiiopsis simplex Carter, 1879, p. 349. 

 Asteropus simplex Sollas, 1888, p. 205. 



A specimen from Station D5179. 



The skeleton would not differentiate this sponge from the type, 

 but in form of body it differs from specimens hitherto collected. It 

 may then be designated forma pyriformis. 



Asteropus simplex (syn. A. haeckeli Dendy), the only species of 

 the genus, has been recorded from Australia and Ceylon (see 

 Sollas, 1888; Dendy, 1905; Hentschel, 1909) ; from the Indian Ocean 

 (Dendy, 1916); from Okhamadal in Kattiawar (Dendy, 1916&). 

 Carter also records the species from Haiti. (See Dendj 7 , 1905, p. 

 110; 1916, p. 252.) The shape as hitherto recorded is massive, some- 

 times attached; or amorphous, or incrusting. 



The Albatross specimen is of an elongate pear shape, tapering be- 

 low to a conical base, which was perhaps rooted in the sand. There 



