STENOCYATHUS. 9 



to burden the nomenclature with a new name, I refer to C. clams 

 a number of specimens obtained near Tortugas, and also a few found 

 with C. formosa on the coast of (Julia. 



The passage from one form to the other is not plainly marked, 

 though a good deal of variety certainly exists. On the Florida 

 side not a single specimen of the C. formosa was found. 



Caryophyllia cornuformis Pourt. 

 Caryophyllia cornuformis Pourt. Bull. Mus. Comp. Zool., No. 7. 



Plate I., figs. 14 and 15. 



Corallum simple, conical, always regularly curved, distinctly but 

 faintly costate. Calicle circular, rather shallow. Septa very little 

 exsert, thin, and somewhat wavy, in six systems and four cycles. 

 Pali in front of secondary septa only, sometimes twisted. Columella 

 of one or two twisted processes. Height about 6 mm., diameter of 

 calicle 3 mm. 



Off Sand Key in 237, 248, and 298 fathoms. 

 Off Cojima, Cuba, in 450 fathoms. 



All the specimens have the base broken and apparently decayed 

 even when living, and were never seen attached. A specimen 

 still living was agglutinated to the shell of a Xenophorus. 



I was at first tempted to refer this species to the genus Cera- 

 fcocyathus of Seguenza (an inconvenient name, by the way, very apt 

 to be confounded with Ceratotrochus), but I have seen good reasons 

 lately to remove altogether Seguenza's genus from the Caryophyllidaa 

 and place it next to Parasmilia (which see). 



STENOCYATHUS Pourt. 



Corallum simple, free, very elongated, and of nearly equal diam- 

 eter throughout ; a single crown of pali ; a columella of one or more 

 twisted processes; no epitheca. 



The single species known of this genus was placed by me in the 

 genus Caenocyathus, having supposed the few specimens then in 

 hand to be detached from clusters formed by budding. A lamer 

 supply has proved that they are always free. 



