REPORT ON THE HEXACTINELLIDA. 371 



node as the result of the disappearance of the principals. Discohexasters also occur in 

 which the long lank curved terminals bear on their thickened external end a marginally- 

 toothed convex disc. Other discohexasters occur with five terminal rays on each 

 moderately short principal. Of the five lacerate campanulate terminal discs of these 

 terminal rays, the four outer are always markedly larger than the central. Rough, some- 

 what spirally curved diacts also occur. Antille Islands, 994 fathoms. 



Genus 6. Hertwigia, 0. Schmidt. 



With the single species, Hertivigia falcifera, 0. Schmidt. 



An irregular lattice-work labyrinth is borne on a firmly attached knotted base. Some 

 of the parenchymal hexasters bear on each of the short principal rays four sickle-shaped 

 hooks representing terminals. Antille Islands, 611 fathoms. 



Genus 7. Hyalostylus, u. gen. 



With the single species, Hyalostylus dives, n. sp. 



A long slender stalk bears a soft folded cup of a somewhat flattened, or triangular 

 bilaterally symmetrical form. The two larger smooth lateral surfaces pass by a rounded 

 edge into one another, while the third narrower side is folded. Besides thread-like diacts 

 with swollen roughened ends, the parenchyma includes four diff"erent forms of rosettes, 

 in which the terminal rays either terminate in long cylindrical clubs, or in terminal 

 claws with convex terminal discs. Besides these, rough slightly spiral diacts occur. 

 South Pacific, 2550 fathoms. 



Family II. A s c o N e m a T i D ^, (Gray). 



The dermal and gastral skeletons contain pentact or hexact pinuli. The hypoder- 

 malia and hypogastralia are pentacts. AVith parenchymal discohexasters. 



Subfamily 1. Asconematin>e, F. E. S. 



Cup-, funnel-, or tube-shaped forms borne on a stalk. The wall has the form of a 

 thin loose plate. 



Genus 1. Asconema, Sav. Kent. 



With the single species, Asconema setuhalense, Sav. Kent. 



Funnel-shaped form. The principalia are long diacts. Between these in the paren- 



