LOPHOHELIA. 25 



This arrangement seems to me more natural than to combine 

 Amphihelia and Diplohelia into one genus, and leaving out Lopho- 

 helia, as Dr. Duncan has done. 



Diplohelia profunda Pouet. 

 Diplohelia profunda Pourt. Bull. Mas. Conip. Zool., No. 6. 



Plate VI., figs. 6 and 7. 



Corallum branching, cylindrical, finely granulated or striated, par- 

 ticularly on younger branches and near the calicles, where the 

 granulations assume the shape of rudimentary costa?. Calicles 

 slightly projecting, very deep, irregularly alternate, and very dis- 

 tant from each other. Septa in three cycles and six complete 

 systems, subequal, not exsert, finely serrate and tuberculated, nearly 

 meeting at the bottom of the fossa. Columella formed of six or seven 

 club-shaped styles, not very distinct from the septa. Height, 3 or 4 

 cm.; diameter of branches. 4 mm.; of calicles, 2,5 mm. 



This species resembles D. raristeUa, but has fewer, deeper, and 

 larger calicles. It seems to differ also from D. Doderleiniana 

 Seguenza by the same characters; in fact, the difference between 

 Seguenza's species and D. raristeUa is not very apparent. 



Off Havana, in 350 fatlioms. 



Off Bahia Honda, Florida, in 324 fathoms. 



In lat. 28° 24' N , long. 70° 13' W'., in 10.30 fatlioms. 



In all cases, dead and more or less worn specimens only were 

 obtained. 



LOPHOHELIA. 



Lophohelia -f- Amphihelia M.-Edw. & H. 



Lophohelia prolifera M.-Edw. & H. 



Lophohelia affinis Pourt. Bull. Mus. Comp. Zobl., No. 7. 



Plate I., ligs. 3, 4, 5. 



My species is identical with L. prolifera, as numerous comparisons 

 with specimens from European seas have shown. 



Off Coffin's Patches Florida, in 195 fathoms. 



Off Double-Headed Shot Keys, in 315 fatLoms (dead fragments). 



4 



