482 COLLECTIONS FROM MELANESIA. 



be mentioned appear to have occurred in the Australian collections 

 of the ' Challenger,' the Eeport on which unfortunately only appeared 

 "while this Eeport was passing through the press. 



108. Leucetta primigenia, J/aclel, var. microrrhaphis, id. 

 Kalkschwamme, ii. p. 118, pi. xxi. 



A small bean-shaped specimen, of the Lipostomella form. 



Hab. Alert Island, Torres Straits, 7 fins. 



Distribution (the species). Mediterranean, Atlantic, Cape of Good 

 Hope, Eed Sea, Indian Ocean, South Australia, Fiji Islands, Chili 

 (Hackel); Kerguelcn and Heard Islands (Polcj<uff). 



109. Leucaltis bathybia, Hackel, var. australiensis, nov. 

 (Plate XLIII. fig. m.) 



Leucaltis bathybia, Hackel, Kalkschwamme. ii. p. 15G, pi. xxviii. 

 fig. 2. 



A small, low, massive specimen, with a small lateral unarmed vent 

 and very reduced cloacal cavity. The quadriradiates are sagittal, 

 those of the outer surface very large ; diameter of rays about 

 •04 millim., the facial angle nearly 180°, the apical ray in the same 

 plane as the laterals; the deep quadriradiates have a somcwh.it 

 smaller facial angle and more slender rays, and the apical ray olten 

 projects well forward ; rays almost straight. The triradiates form 

 a thin layer on the inner wall, where their rays measure only 

 about -01 millim. in diameter ; they have a facial arjgle of about 

 160°; in the deep parts they are subregular, sparsely scattered 

 amongst the quadriradiates, and the rays measure about -02 (some- 

 times -025) millim. in diameter; rays approximately straight. 

 Colour (in spirit) white. 



This form differs from vars. perimina and arabica of Hackel (I. c.) 

 in the massive shape of the sponge, and in the larger size, as com- 

 pared with the quadriradiates, of the deep triradiates. In the com- 

 parative straightness of the rays it agrees with var. arabica and 

 var. mascarenica, mihi (see this Eeport, "Western Indian Ocean 

 district) ; but differs from the latter in the smaller diameter of the 

 rays of the large quadriradiates, in the apparent smoothness of the 

 cloacal surface, and the massive form. 



Hub. Port Jackson. 



Distribution of species Eed Sea, (Hackel). 



110. Leuconia saccharata, Hackel. 



Leucandra saccharata, Hackel, Kalkscltu amine, ii. p. 228, pi. xxxiii. 

 fig. 3, pi. xxxviii. tigs. 7-14. 



A fine specimen, 00 millim. across, of the Amphorisms type, and 

 fragments. One cloacal fistula measures upwards of 30 millim. in 

 length. 



Hab. Port Jackson, 0-5 fms. 



Distribution. Pass Straits (IJiickel). 



