458 " THETIS " SCIENTIFIC RESULTS. 



PACHYCHALINA PAUCISPINA, Lendenfeld. 



Pachychalina paucispina, Lendenfeld, Zool. Jahrb., ii., 1887, 

 p. 776. 



Sponge digitate, shortly stipitate, with numerous irregular, 

 main, cylindrical branches ; the lateral branches are given off at 

 right angles, and the sponge in consequence tends to become wide 

 above the penduncle. The upper part consists of slightly nodose, 

 subcylindrical branches about 7mm. in diameter, with here and 

 there a bifurcation ; the longer branches attain to about 370mm. 

 in length. 



Texture rather soft and elastic. Surface smooth to the eye 

 but harsh to the touch ; the reticulation is very fine without any 

 well-defined pores. Oscula few, shallow, and irregularly scattered, 

 varying from 1 to 3 mm. in diameter. Colour in the dried example 

 stone grey. 



Skeleton with a rather wide mesh, oblong or subrectangular. 

 The primary fibres are about 0'04mm. in diameter and 044 mm. 

 apart ; the transverse secondaries are given off at intervals of 

 about 0"5 mm. 



The spicules are straight oxea, abruptly, but rather bluntly 

 pointed. Size 0-1 by 0002 to 0-003 mm. 



The above-described specimen has been identified by comparison 

 with a fragment from the British Museum, received under the 

 name of Dactylochaliaa patccispijia, Lendenfeld. I presume this 

 is a m.s. name. 



PACHYCHALINA PUNCTATA, Bidley and Bendy. 



Pachychalina punctata, Ridley and Dendy, Chall. Rep., Zool., xx., 

 1887, p. 24, pi. vi., figs. 2, 2a, 2b, 2c, pi. xlvi., figs. 1-2 ; 

 Lendenfeld, Zool. Jahrb., ii , 1887, p. 776 ; Whitelegge, 

 Rec. Austr. Mus., iv., 1901, p. 69. 



Station 8. 



A single specimen was obtained ; it assumes a folded, incom- 

 plete cup-like shape, with a semi-circular expansion at the base. 



PACHYCHALINA COMMUNIS, Lendenfeld, sp. 



Ghalinissa communis, Lendenfeld, Zool. Jahrb., ii,, 1887, p. 772; 



Id., Austr. Mus. Cat., xiii.. Sponges, 1888, p. 87, pi. vii. 

 Pachychalina communis, Whitelegge, Rec. Austr. Mus., iv., 1901, 



p. 20. 



In the above paper Dr. R. v. Lendenfeld described under the 

 generic name of Ghalinissa eleven species and two varieties. 



