SPONGES FEOM PORTUGAL. 213 



Kepresented only by a worn out fragment of the 

 skeleton. 



Aplysinopsis, sp. ? 



Two of the specimens are flat, sessile, not branching, 

 measuring 4 cm. horizontally and 7 mm. in thickness, 

 their surfaces being raised into blunt conuli. A third 

 specimen, possibly belonging to a different species of 

 Aplysinopsis, is apparently cut off from a larger specimen. 

 It consists of a basal portion with three branches and 

 measures 5 cm. in length, each branch being about 12 mm. 

 in thickness. Its surface is covered by sharp-pointed 

 conules, arranged in irregular ridges. Consistency elastic 

 and very tough. Colour (in spirit) yellowish. 



Oligoceras collectrix, F. E. Schulze. See v. Lenden- 

 feld (5). 



Two specimens, of a very crumbling consistency. 



Hircinia variabilis, F. E. Schulze. See v. Lenden- 

 feld (5). 



Two specimens, the larger of the two being flat and 

 sessile, measuring 5 cm. horizontally, 6 mm. in thickness. 

 Thickness of the fibres 0"07 to 0*12 mm., thickness of the 

 filaments O002 mm. 



Order Tetractinellida. 



Pcecillastra armata, n.sp. 



This species differs from all other known species of the 

 genus by possessing anatriaena in addition to other spicules. 



Sponge massive, irregular, measuring 10 by 5 by 5 cm. 

 Surface even, rough to touch. Oscula 1 mm. in diameter, 

 scattered. Examined in the dried condition. 



The skeleton appears very confused, and is made up as 

 follows : Megascleres : (1) Oxea, of huge dimensions, 

 somewhat slantingly arranged towards the surface, straight, 

 or only slightly curved, measuring 3 by 0'055 mm. (2) 



