APPENDIX. 239 



Habitat. — Berwick Bay, Holy Island (Johnston), 

 Budleigh-Salterton (Carter). 



Ttis is not tlie sponge described by Bowerbank 

 under tbis name and wbicb is spiculiferous. The true 

 Halisarca forms a tbin gelatinous crust, wbicb is 

 entirely devoid of spicula. 



2. Halisaeoa lobularis, Schmidt. 



Halisarca lobularis, Schmidt. Spong. des Adriat. Meeres, 1862, 



p. 80. 

 Halisa/rca lobularis, Carter. Ann. Nat. Hist., ser. 4, vol. xiii 



(1874), p. 433. 



Sponge consisting of irregularly lobed ridges about 

 a line bigb, extending tbemselves in brancbed digita- 

 tions over tbe rock. Lobes ficoid, agglomerated, 

 divided into minute lobuli witb angular pits or intervals 

 between tbem, wben tbey cannot from tbeir rounded 

 forms come into contact. Surface smootb, sleek, and 

 of a pink colour on tbe prominent portions, passing 

 into ligbt-brown yellow below. Vents sparse, situated 

 bere and tbere on tbe lobes, not raised above tbe 

 surface, and suflBciently large to be visible to tbe 

 naked eye. Pores minute and numerous, eacb con- 

 sisting of a round aperture situated in tbe centre of a 

 papiUiform ring, wbicb rings being in juxtaposition 

 tbus form tbe dermal surface of tbe lobule. No 

 spicules of any kind. Size of specimen one and a balf 

 incb long by one incb wide and one line bigb. 



Habitat. — New Red Sandstone Rocks, Budleigh- 

 Salterton. 



Geographical Distribution. — ^Adriatic Sea. 



