AVTHHMKWS.TC TTTJIMS. 



129 



tube give rise to numerous simple or branched, blindly-ending side branches ot o.} to i mm. 

 in length. Some ot these side branches are simple sacs, but others give rise to secondary 

 branches. The stomach is wide and cruciform, but the side walls are remarkably short, so 

 that the mouth is a gaping, cruciform slit, reminding one of" the mouth-opening of Stauro- 

 pliwa. The 4 interradial sides of the stomach form 4 curtains within which the sperm or 

 ova are developed. The tree, lower edges of these curtains are crenulated and thrown into 

 complex folds. The stomach and gonads are cherry-red and the canals and tentacles are 

 light-red in color. This species is found on the coast of Greenland. 



Turris digitalis Forbes. 



Ttirris <//t;fM/is, FORHF.S, 1848, British N.ikei!-eyed Medusa-, p. 21, plate 3, figs. lil-lt. A<;ASSIZ, L., 1X62, Cunt. Nat. Hi t 

 U. S., vol. 4, p. }4<>. H\KI k M , 1*74, Sv\t . .Icr Mr ilusen, p. fl , taf. 4, figs. 2, 3. \>* VINSI N, lSn, Vui . Mrddrl . N .M 

 For. Kjdhenh.ivn (5), Bd. 4, p. 144. -Km KIMUKC., iSSo, Vergleu hen, I phvsiolog. Suidien /u Turnv, etc., Aht. 5, p. 124 

 (reactions to curare and strychnine). 



Bell cylindrical, with a well-developed, conical, apical projection. It is 30 to 40 mm. in 

 height and 15 to 20 mm. in diameter. There are 50 to 100 short tentacles, which appear as if 

 arranged in two rows owing to the tact that the bases ot the larger ones extend a slight dis- 

 tance up the sides ot the bell above the margin. 



KM.. 68. Turrii digitalis, after Haeckel, 1879. 



Fn;. 6<). Corri* i\ilf,/>liilnilr>ia t after Haeckel, in S\st. lrr MeJuseti. 



There are 8 strands ot longitudinal muscle fibers within the wall of the subumbrella. 

 These strands lie close to, and upon both sides ot, the 4 radial-canals. The radial-canals are 

 broad and flat. In its upper halt each radial-canal is a simple, flat tube with a straight edge. 

 In their lower halves, however, the canals become broader and give rise to many small side 

 branches which end blindly. The manubnum is very large and fills the greater part ot the 

 hell-cavity. The mouth extends to the level of" the velar opening. There are 4 prominent 

 crenulated lips. The gonads occupy 4 interradially situated, longitudinal regions upon the 

 wall of" the stomach. Each gonad consists ot" a double row of papilliform ridges, the outer 

 surfaces of which are thrown into complex folds and corrugations. 



The stomach is purple or reddish-brown and the lips are rose-colored. The gonads 

 are darker in hue than the stomach. The tentacle-bulbs are orange or yellow and their 

 outer ends are white. The bell is transparent. The 8 muscle-strands in the subumbrella 

 are yellow. 



