KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 59. N:0 I. 5 



Each specimen has two basal processes. 



No. 5 is a young specimen, which has been attached to the ground by its pointed 

 base. It is a representative for the forms which were described by Edwards & Haime 

 under the uame of Flabellunt spinösum. It shows a verv obvious agreement with a spe- 

 cimen in the Swedish State Museum, which, according to a note, belonged to Semper's 

 own colleetion of F. variabih. Of the others, which all lack a base, no. 2, as regards 

 its exteriör, seems to correspond to fig. 12, plate VIII of Edwards k Haime (F. stokesi 

 E. & H.) and nos. 3 and 4 to their fig. 9, plate VIII (F. oiveni); no. 1 finally has the 

 sireatest resemblance to the outline to the right in the second line from the bottom of 

 Semper's plate XVII. 



Flabellum angiostomum Folkeson n. sp. (Figs. 1—3). 



45 miles W. S. W. off Cape Jaubert, 11.7.11, 72 feet, 1 sp. 



Total number of septa 268; number of septa which reach the columella 62; length 

 of calice 46 mm; breadth of calice 15 mm; depth of calice 14 mm; height of corallum 

 34 mm; base pointed. 



Seen in side view, the corallum resembles F< pavoninam Lessox. It is compressed, 

 hut there are neither wings nor root-like processes, nor any indication of such formations 

 on the somewhat rounded side-edges. These edges meet each other at an angle which 

 approaehes to 180°. 



The epitheca, of which the greater part is covered by polyzoa, molluscs, worm- 

 tubes, and balanides, is somewhat wavy, transversally as well as radially. The rupture 

 of the stalk is rather old; it has alsc such a polyzoa -co ver. The septa are thin and not 

 crimped and are covered with verv small grann! ae; tbey reach the upper part of the 

 w all, but ouly a few of them project above it slightly. The upper parts of the 62 larger 

 septa, which are almost equally developed, are convex and reach very prominently into 

 the calice, and have exceedingly minute marginal teeth; the more central parts of their 

 edges are entire and remarkably concave. Thus the larger septa have the form of an S. 

 Their inner parts slope vertically down to tlie columella. The edges of the septa of 

 higher cycles are toothed to their full extent, and their granulae are more obvious ac- 

 cording to the thinness of the septa. 



The columella is very narrow and is formed by septal spines. 



I have not been able to identif} r this specimen with anyone of the many spccies 

 already described, and I have therefore established a new one. It seems, however, to 

 be nearest related to F. pavoninum Lessok, but it differs from this species in the peculiar 

 form of its larger septa and the small distance between the edges of the upper 

 parts of the opposite larger septa. 



Placotrochus laevis Edwards & Haime 1848. 



Placotrochus laecis Edwards & Haime 1848 (10), p. 282 

 Placotrochus laevis Semper 1872 (2(>). p. 251, plate XA 



There are five specimens of this rare species from the Banks off Cape Jaubert. 



Placotrochus laecis Edwards & Haime 1848 (10), p. 283, plate VIII, figs. 15, 15 a. 

 Placotrochus laevis Semper 1872 (26), p. 251, plate XVIII, figs. 11 — 13. 



