FAUNA OF THE OUTER WESTERN AREA OF THE CHANNEL. 305 



Grantidae respectively. Since, however, the arrangement of the 

 monaxons depends, as Dendy observes, on the variation of the canal 

 system, it seems to me inadvisable to limit the latter family too 

 stringently in regard to this character, which may in greater or lesser 

 degree still retain the Syconoid form, as in capillosa, after the branching 

 of the chambers has begun and a definite cortex has been assumed. 



Mr. C. r. Jenkin first called my attention to this sponge among 

 some unnamed material, and identified it as this species on Haeckel's 

 description. Eecently Mr. Kirkpatrick has kindly afforded me the 

 opportunity of examining at the British Museum a co-type of Oscar 

 Schmidt's labelled " Sycon cajnllosum " in his own handwriting, which 

 enables me without doubt to confirm Mr. Jenkin's identification. It 

 will not improbably be found that some confusion has arisen concern- 

 ing the identity of the species, like many other Calcarea. Particular 

 features which characterize it are : (1) its tendency to interruption of 

 outline, as though through injury, in the region of the osculum, as 

 figured by Scmidt (32, PI. I, Fig. 6); (2) the shape of the dermal 

 triradiates, approximating somewhat to the remarkable form of those 

 in Lcv.candra Jistulosa, though much stouter, with longer basal ray, and 

 smaller unpaired angle than in that species ; (3) the slender sub-gastral 

 triradiates with very long tapering basal ray, shorter lateral rays 

 nearly at right angles to it, and often with a fourth ray developed in 

 about the same plane as the latter. 



The species was originally recorded by Schmidt from Lebenico in 

 the Adriatic (32, p. 17). Haeckel (14) also records it from Lesina on 

 his own authority and that of Heller. Lendenfeld (22) adds Muggia, 

 Pirano, and Eovigno to these localities. It has also been said to occur 

 at Naples, but as the only slide I have seen so labelled from that 

 locality is undoubtedly of a different species, the latter record seems to 

 need confirmation, and apart from this there is apparently no previous 

 record of its occurrence outside the Adriatic. 

 Leucandra fistulosa (Johnston). 



One specimen at Position 1. 



Depth, 40 fath. 



Monaxonida. 

 HADROMERINA, Topsent (40). 

 TETHYIDAE.* 

 Tethya lyncurium (Linnaeus. 

 One specimen at Position 62. 

 Depth, 50 fath. 



* Dr. Hartmeyer on p. 379 uses this name for an Ascidiau family on the ground that 

 the Ascidian genus Tcthyum is of earlier date than the Sponge genus Tethya. 



