Ö4 



T. (iISLÉN, 



gets a cliai'ac'leristic wart-shaped appearance, while in Contmiiheria it 

 continues to lengthen to a long, large chinuiey. In snjaller young 

 forms the mouth is ccnlral, but e.\cei)t in Comasler serrula il is soon 

 dislocated margiiu\lly. 



The young of Vaii/a has, if my determiiiation is correct, a i-ntlirr 

 long unswollen anal cone, and a tolerably »lean» disk. 



Naturally the fixed points obtainable by an examination ol the 

 disk, are only to be used together with the otlu'r chai'acteristics whicli 

 are found, if, liowevei", in the eompai-ison and systematizing (d' the 

 Comasterid youngs one takes into consideration the appearance and 

 formation of the disk, I believe that we will be able to predict with 

 greater probability than otherwise to wiiich sjiecies or genus the young 

 Comasterid in question might be referred. 



Zygometridse A. H. Clabk. 



Catoptometra A. H Clark. 

 C. Hartlaubi A II. Ci.ahk. 



Fig. 48—51. 



Svn: Auledon Ifarthnihi 11)07 A. H. Clakk Proc. U. S. Nal Mus. Vol. 33, 

 p. 72; 



Zygomrtra KochJrri 1907 A. H. Clark Smiths. Misc. Coll. Vol. 50, p. 339; 



Caioptomdra HarthniJii 1908 A. H. Clakk Proc. U. S. Nut. Mus. Vol. 34, p. 

 317; 1912 Clin Iiul. Ocean, p. KJtj; 1915 Monogrnpli pp.; Journ. Acad. Sei. \'ol. 5, 

 p. 214; 1918 Siboga Exp. Vol. 42 B, p. 63. 



From St. ö = i specimen. 



Sp. I Cd. large, flattened, a little deepened in the centre, with 

 calcareous granules which towards the margin are arranged in about 

 10 rays. Diameter 5 nun. free dorsal pole 3,.^ mm. h = 0,8 mm. 



C. XXVIII 14—15 (D) 16-17 (V), 11—17 mm. in two close, alter- 

 nating whorls, 2'' segment cubical, 3'' a little longer, slightly hour-glas.s- 

 shaped (= most of the following cirrals), 5*'' — 7"' segment L = 2 br. 

 then shorter again L = 1 '/2 — 1 'Z* br, without dorsal spines. Penul- 

 timate segment L' = 1 '/'^ hr with dorsal medially placed, \'ery weak 

 opposing spine, h about '/-^ <jf the br of tlie segment. Terminal claw 

 narrow, somewhat cur\'ed, longer than the preceding segment. 



