HALICHONDBIA. ' 95 



dissection of Dr. Bowerbank's second volume, yet tlie 

 laws of nomenclature necessitate that Dercitus must 

 stand. At the same time, in Ms paper on the arrange- 

 ment of Sponges, as in so many other kindred publica- 

 tions. Dr. Gray has shown that grasp of scientific 

 arrangemeat and classification which enabled him to 

 detect and lay hold of generic characters ; and I have 

 little doubt that before very long almost all the genera 

 of Sponges which he instituted will be recognised 

 and his names of necessity employed. 



Sub-Ordbb III, r, 193 ; ii, 8. 



Genus 21. — Haliohondria, Fleming, i, 195 ; ii, 9. 



1. Haliohondeia MaoIntoshii, Bow., hi, 340, PL XCI, 



figs. 18, 19. 



1874 Ealichoncbria MaoIntoshii, Bowerbank. In M'Intosli on 

 the Invertebrate Marine Fauna and Fislies of St. 

 Andrews, Ann. Nat. Hist., ser. 4, vol. xiii, 1874, p. 144 ,■ 

 and also the Marine Invertebrates and Fishes of 

 St. Andrews, 1876, p. 15. 



2. HaLICHONDEIA EEGULAEIS, BoW., Ill, 202, PI. LXXIII, 



figs. 10, 11. 



3. Haliohondeia caduca, Bow., ii, 234; iii, 10],P1. 



XLI, figs. 9—11. 



1870 Amorphina caduca, Schmidt. Spong. Atlant. Geb., 

 p. 77. 



