112 



Of the other dredgings, the specimens of II., Ill, and VI. 

 closely resemble tnose of I. No. II. has 7 specimens of type i, 

 3 of type 2, and 4 young ; while III. has 20 of i, 2 of 2, and 22 

 young. No. VI. has only type i and young in the proportion 

 to one another of 4 to i, but the tendency of all its specimens 

 is to be smaller than in I., II., and III. The calicle of the single 

 specimen of VII. belongs to type 2, but the specimen is unique 

 in that it is conical, and has no Aspidosiphon nor any trace of a 

 gastropod or other shell (PI. III., figs. 33 and 34). 



The specimens from Nos. IV. and V. differ from the rest 

 in that {a) their costae are very distinct ridges, rounded, but 

 with deeper intercostal spaces than in type i ; {b) their septa 

 tend to have a few of cycle V., and are intermediate in most 

 characters between types i and 2 ; {c) their pali rather belong 

 to type 2, the specimen shown in fig. 39 being one of the nearer 

 to type I ; and {d) their columella is generally represented by a 

 series of very fine rods. The average size of the specimens is 

 larger than from other dredgings, 16 corals (4 of IV. and 12 of 

 V.) giving average length of calicle io"5 mm. by breadth g'dg 

 mm. Size almost precludes any except one of those shown in 

 fig. 40 from being regarded as young, but some almost resemble 

 young forms from I. greatly magnified, noticeably those shown 

 hi figs. 41 and 43. 



At first sight, the specimens from Nos. IV. and V. almost ap- 

 pear to represent a different type to the rest, and in this con- 

 nection it is noticeable that they come from similar depths and 

 localities, considerably differing from the other localities. Some 

 specimens, however, approximate towards each of the types — 

 IV. are closer to type i — and in each character there is a series 

 between. In seven of the specimens from these dredgings the 

 corals have settled on relatively large, conical shells, over which 

 they are attempting to spread themselves (figs. 40, 41, and 43). 

 In one where there is no trace of an Aspidosiphon the shell is 

 flattened and still larger (fig. 42). One has its base, in which 

 no shell can be seen, much distorted by the presence of two 

 worms, having two external apertures and two spiral cavities. 



Genus CARYOPHYLLIA (LAMARCK). 

 9. CARYOPHYLLIA RERTERIANA (Duchassaing). 



C. berteriana, Ed. and H., Cor. II., p. 19, pi. D I., fig. i. 



C. bertcrinna et formosa, Pourtales, Cat. Mjts. Comp. Zool., IV., 



p. 7 (1871); Mnn. Mus. Comp. Zool., IV., p. 34, pi. VI., 



figs. I and 2 (1874); Bull. Mus. Comp. Zool., VI., p. 99 



(1879)- 



There are two specimens in the collection of this typical West 



Indian coral, which was also obtained by the Challenger Expedi- 



