ART. 4 



SPONGES OF CALIFORNIA de LAUBENFELS 



35 



POECILLASTRA TENUILAMINARIS (Sollas) 



Normania tenuilamiuaris Solxas, 1S86, p. 186. 

 PocciUastra tenuilaminaris Sollas, 1888, p. 85. 



Holotype.—BM. No. 89.1.1.31. 



Type locality. — Japan. 



Material examined. — The specimen described below (U.S.N.M.No. 

 21400; B.M. No. 29.9.30.9) was trawled by the University of Southern 

 California, June 23, 1916, west of Santa Catalina Island, Calif., 

 depth not given. 



Desaiption. — Shape, lamellate. Size, 9 to 13 mm thick and about 

 10 cm high. Consistency, stiffly fragile. Color in alcohol, drab. 

 Oscules, scattered, on one face only; diameter about 0.9 mm; distance 

 apart, less than 1 cm. 

 Pores, small and scat- 

 tered, principally or 

 only on the nonoscular 

 face. Surface, superfi- 



cially smooth. . // / 7 V /^ ''' '^ aV 



Ectosomal specializa- J^ ^ -J ^^ ^ -^ 7=^ jf 



tion, not evident. En- ^ 



dosomal structure, a 



cal- 



FiGUiiE 14. — PocciUustra tcnuiknniitdiis (Sollas) : A-E, 



megasclere.?, X 14 ; lower spicules are the micro- 

 scleres, X300. A row of typical asters is shown to 

 illustrate the range of variation from plesiasters 

 almost to spirasters 



confused mass of 

 throps and oxeas. 



Principal spicules, cal- 

 throps (fig. 14, C, D, 

 E) ; size of rays, about 40/* by 350|a. Interstitial spicules, exeas (fig. 

 14, ^, 5) ; size 35/* by l,350/i to 45/(, by 2,500jti. First microscleres, 

 plesiasters (fig. 14, F) ; length, 20/* to 28/*. Second microscleres, 

 metasters (fig. 14, Z) ; length, 14/t to 16/t. Third microscleres, 

 microxeas (fig. 14, G)\ size, about 3/* by 135/*. 



Remarks. — This genus is regarded by various authors, for instance, 

 Dendy, as synonymous with Pacliastrell<i., but I hold with Wilson 

 (1925) in retaining Poecillastra. Many of the species referred to the 

 latter are probably conspecific with tenuilaminaris., but, pending a 

 revision of the genus, I make no decisions in this regard but would 

 comment that following such revision it may devolve that some other 

 .specific name has priority. 



Genus PENARES J. E. Gray 



PENARES CORTIUS de Laubenfels 



Penares Gortius de Laubenfels, 1930, p. 26. 



Holotype.—V.S.'NM. No. 21479; B.M. No. 29.8.22.47. 

 Type locality. — Collected by me at Pescadero Point near Carmel, 

 Calif., intertidal, July, 1925. 



