Mr. H. J. Carter on the Lithistidai. 439 



iSpecies in which the surface-spicule consists of a shaft and three arms. 

 Arms sinuous, branched, curvilinear, tubercled on the upper or 

 outer aspect, and Jiligreed at the extremities ; shaft Jiligreed also 

 at its extremity. 



Minute spicule long, slender, fusiform, subspinulate, smooth, 

 most numerous on the margin, where it forms a fringe. 

 Azorica Pfeifferce^ Carter. Azores. (11) 



Species in which the surface-spicule is much the same as the last, but 

 with others like those of Dactylocalyx Bowerbanldi and D. poly- 

 discus among the body -spicules. 



No minute spicule observed. 



Corallistes horealis, Carter. Faroe Islands. (12) 



Species in which the surface-spicule consists of a long shaft and three 

 arms, bifurcated and more or less tubercled on the outer or upper 

 aspect. 



Minute spicule (in the slide at the British Museum) straight 

 or slightly curved, smooth, fusiform, acerate. 



Corallistes noli tangere, Schmidt. Portugal, St. 

 Jago. (13) 



Species in which the surface-spicule (according to the slide in the British 

 Museum) is like that of Dactylocalyx Masoni, with the branches 

 of the body-spicules in like manner glomerato-tubercled. 



Minute spicules in the slide of two kinds, viz. one acerate, 

 fusiform, curved, smooth ; and the other with sinuous shaft, 

 spirally covered with fine spines like that of D. Masoni. 



Corallistes microtuberculatus, Schmidt. St. Jago, Cape- 

 Verde Isl. (14) 



Species imvhich the surface-spicule (according to the slide in the British 



Museum) is like that of Dactylocalyx Bowerbankii ; the rest with 



large Jiligreed head and long sinuoi(s shaft Jiligreed at the 



extremity, as in the figure (Atlantisch. bpongienf. Taf. iii. f. 5). 



Corallistes elegantior^ Schmidt. Portugal. (15) 



Species with curly Jiligreed spicides (according to the slide). 

 Leiodermatium ramostim, Schmidt. Florida. (16) 

 l^nceus, Schmidt. Portugal. (17) 



Fossil species in ivhich the surface-spicule is not known, but in which 

 the body-spicule has the common branched JUigreed form. 



Minute spicule not observed. 



LitJiospongitis Kitfonii, Carter. Carrow, hamlet ad- 

 joining Norwich. (18) 



