KIU/."M'o\l.K CATOSTJ I.i 8. (171 



The 8 ocular radial-canals are |omed one to another by a thick, irregularly anastomosing, 

 network of canals. The ring-canal is not clearly defined. Other radial-canals (?) Color l ; 

 Found at Puna Island, near Guayaquil, coast of Equador, South America. 



Catostylus tripterus. 



To\arl\tus tripterus, HAF.CKEL, 1880, Syst. dcr M-'.lusrn, p. 586. 



Crambessa iriptera, VANHOFFFN, 1901. WISM-M. F.rt^-b. deutachea Ticfscc Expt-,1. I'tildivia., Bd. 3, Lfg. i, p. 52. 



Bell 50 mm. wide, hemispherical. 8 rhopalia, 48 lappets. In each octant 4 wide, nearly 

 quadratic, velar lappets between 2 smaller, but lunger, conspicuously projecting, ocular 

 lappets. 8 arms, somewhat longer than bell-radius, are grouped in 4 pairs, and each consists 

 of a stout, long, nearly cylindrical upper part of the arm which is twice as long as the ^-cornered 

 pyramidal, lower part ol the arm. There are 3 wide, leat-hke projections on this lower part 

 of the arm, and the mouths on their edges are only slightly folded. There are no appendages 

 between the mouths. 4 horseshoe-shaped gonads. 



Found on the west coast ot tropical Africa at Fernando Po Island, on the coast of Guinea. 

 Color (?) 



Catostylus turgescens. 

 Toxoclytus lurgticens, SCHULTZE, L. S., 1898, Dcnkschr. McJ. Nat. Gcs,. Jena., Bd. 8, p. 455, uf. ',4, figs, i*,, 14. 



This is described by Schultze from a single specimen which appears to be quite abnormal 

 so much so that I have but little taith in its value. 



Bell flatly rounded, 90 mm. wide. Exumbrella smooth. 9 marginal sense-organs. 

 Marginal lappets narrow and sharp-pointed. Number ( ? ) Arrangement ( : I 6 subgemtal 

 ostia wider than the arm-shafts which separate them. Arm-disk flat. The 6 upper arms are 

 thick, arrowhead-shaped and curve outward; they are about 19 mm. long and 17 mm. wide. 

 Lower arm sharply pointed, only about 12 mm. long. There are thin filaments upon the 

 arm-disk between the mouths, but no other appendages. The canal-system consists of a fine 

 anastomosing network on the inner and outer sides of the ring-canal. This network does 



o o 



not reach the margin. There are also unbranched radial-canals and blindly-ending centrip- 

 etal canals. Amboina, Moluccas. Color (?) 



% 



Catostylus purpurus, sp. nov. 



This torm is closely related to Catostylus stiphropterus, from Ternate, but differs in the 

 number and arrangement ot its marginal lappets and in its deep, uniform dark brownish- 

 purple colorarion. 



Disk flatter than a hemisphere, 88 to 115 mm. wide, 26 to 35 mm. high. F'.xumbiella 

 smooth. 8 rhopalia flanked bv short, narrow, bluntly rounded lappets. A furrowed exumbrella 

 sensory pit above each rhopahum Rhopalar lappets somewhat narrower than the velar. 

 In each octant there are 4 cleft and 2 simple velar lappets arranged in a detinue manner, see 

 A and it, tig. 412. In the middle of each octant there area pair of cleft velar lappets, and 

 these are flanked on their outer sides by 2 simple velar lappets, which are in turn bordered 

 by 2 cleft velar lappe's. Thus the lappets ot each octant are arranged in sequence as fol- 

 lows: (l) a small, simple, rhopalar lappet adjacent to the sensory-club; (2) a cleft vcl.n 

 lappet; I}) a simple velar lappet; (4 and 5) 2 cleft velar lappets; (6) a simple velar lappet; 

 (7) a cleft velar lappet; iS) a small rhopalar lappet. Thus the bell-margin displays <>'> nearly 

 equally spaced notches, there being 16 rhopalar and So velar terminal lappets. 



The arm-disk is about as wide as the bell-radius at its origin from the subumbrella, but 

 at the level of the origins of the 8 mouth-arms it is somewhat less than three-eighths as wide 

 as the bell-radius. There are 4 long, narrow, genital ostia nearly as wide as the 4 perradial 

 columns of the arm-disk. Each ostium is constricted bv a thick, wide, median gelatinous 

 projection from the arm-disk. A long, finger-shaped papilla arises from the subumbrella 

 surface in the median line on the outer side of and close to the opening of each genital 

 ostium, and this is in some specimens flanked by a pair ot cocks-comb shaped, gelatinous 

 projections from the floor of the subumbrella as is shown in c in text-figure 412. I he arm- 

 disk is notched in each perradius. The unitary subgenital cavity is wide and cruciform. 



