136 



ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



Stout Acerate 

 Spicules 



A. camiims from off Brazil. 



1-4 to 1-6 mm. by -04434, smooth, 

 straight, tapering to sharp 

 points,8catterecl,not proj ecting. 



Fhie Acerate of 



"CoUar"' ... 



Triradiates , . . 



i. Ear 



ii. & iii. Eavs 



f About 1-4? mm. by -0095 to 



\ 'Olios, straight, smooth. 

 From outer surface to near inner 

 surface. 



J Basal aborally(?') placed, -497 ram. 



\ to -oS by 057' to -075. 



i Laterals 'oO mm. to 43 by "0475 



\ to 057. 

 Eays tapering to sharp points 

 from near base, slightly undu- 

 lating. Gastrally-placed spi- 

 cules directed towards cloaca, 

 oral angle about 1.50° ; the rest 

 irregularly placed. 

 Qiiadriradiates ... On gastral surfece and aggregated 

 in groups in interior of wall. 



Lateral rays -14 mm. bv '01267, 



or -228 by -019. 

 Basal, aborallj' placed, '14 mm. 



to -19 by •01267. 

 Apical '076 mm. by '0095. 



Bays smooth, tapering to sharp 

 points from base ; basal and 

 oral lateral .slightly undulating, 

 the rest straight. Oral angle 

 150° to 160°. 



Var. ci'ossior. 



About 2-5 (?) mm. by -04434 to 

 06334, smooth, straight, taper- 

 ing from near middle,scattered, 

 not projecting. 



About 1-25 (?) mm. by -095, 

 straight, smooth. 



Prom outer surface to near inner 

 surface. 



•64 mm. by -06334. 



■816 mm. by -06334. 



Eays smooth, slightly undulating, 

 tapering to sharp points from 

 base ; angles equal ; spicules 

 variously placed. 



On gasti'al surface and aggre- 

 gated in groups in interior of 

 wall. 



Facials about -32 mm. by -019. 



Apical -16 (?) or 32 mm. by -019, 

 and some smaller ones like 

 those of the typical form. 



Eays smooth, tapering to sharji 

 points from base, generally all 

 somewhat curved. Oral angle 

 either about 160° or 200°. 



Examined, In spirit, aud by sections in balsam. 



Hab. Victoria Bank (off S.E. Brazil), 39 fathoms ; bottom, coral. 



Grantia atlantica, sp. n. (Plate XI. fig. 8.) 



(Grantia, Fleming, Hist. Brit. Auim. p. 524. Sycandra, Hackel, 

 Kalkschwamme, ii. p. 291,) 



Sponge forming a single oval tube. Walls very thick (about two 

 thirds the diameter of the cloaca) at centre, tapering to \ent and closed 

 end. Colour yellowish white in spirit. Vent surrounded by slight 

 fringe of acerate spicules. Outer surface slightly roughened by points 

 of acerate spicules, &c. ; inner surface similarly roughened by apical 

 rays of quadriradiates. Arrangement of canal-system agreeing with 

 that oi Sycandra, Hackel ; the straight radial tubes extend to within 

 a short distance of the dermal surface ; they are hexagonal, and are 

 completely fused with each other by broad connexions ; this inter- 

 mediate substance is penetrated by narrow roundish " intercanals " 

 running parallel with the radial tubes. The dermal layer, interposed 

 between the ends of the radial tubes and the surface, consists of 

 stout triradiate spicules and the exterior ends of the acerates. The 

 substance of the wall between this and the cloacal surface is filled 

 with the bases of the acerates, and with some more slender triradiate 



