31 
Fig. 3: one of the largest medusa-buds. Zeiss Comp. Oc. 4, Apochr. 8. 
— 4: base of external part of a Sarcotretes carrying a youn g Ichthy o- 
codium, consisting of a single polype, still without mouth-opening 
(“Tbor” ’s station 124). 
5: tbe same part of another Sarcotretes with a young Hydroid- 
colony of polypes of different sizes (“Thor’”s st. 93). 
— 6: posterior portion with tbe stalk and part of tbe internal portion 
of a Sarcotretes sbowing a Hydroid-colony with several polypes 
(only one carrying a tiny medusa-bud, me) and its ramified tubes 
of tbe basal membrane (“Tbor’”s st. 89). Zeiss Oc. 1, Obj. a* 10. 
7: adult female Sarcotretes with egg-strings (“Tbor’”s st. 76). Zeiss 
Oc. 1, Obj. a* 10. 
— 8: anterior part of tbe same, from dorsal side, but somewhat obliquely 
(“Tbor ,,, 8 st. 76). Z. Comp. Oc. 4, Apochr. 16. 
— 9: posterior end of tbe same, ventral aspect. * cbitinized spot, pro- 
bably wbere tbe copulatory openings have been. X as Fig. 8. 
— 10: anterior part of an adult Sarcotretes Q, ventral aspect („Tbor”’s 
st. 89). Enlargement as in Figs. 8 and 9. 
Plate II. 
Fig. 11: Cyclops-stage (A) of Sarcotretes scopeli from left side (“Thor”’s 
st. 80). Z. Comp. Oc. 4, Apochr. 8. 
— 12; tbe same, dorsal view. 
— 13: second pupal stage (C), from right side. (“Tbor’”s st. 177). 
Z. Comp. Oc. 4, Apochr. 16. 
— 14: tbird pupal stage (D), male specimen (“Tbor’”s st. 80). Magnif. 
as Fig. 13. 
— 15: fourth pupal stage (E) (“Thor”’s st. 76). Inside tbe sipho is seen 
part of tbe mouth-funnel of tbe enclosed copulatory stage. 
— 16: young female, ca. 4 mm. long; stage inserted into tbe body wall 
of tbe fisb (“Tbor”’s st. 76). Z. Oc. 1, Obj. a* 10. 
— 17: anterior part of tbe same specimen, from dorsal side. Z. Comp. 
Oc. 4, Apochr. 16. 
— 18: posterior end of tbe body of tbe same, lateral view. Enlarg. as 
tbe preceding. 
— 19: young female, somewhat older tban tbe preceding, from right side 
(“Tbor’”s st. 76). Oc. 4, Obj. a* 10. 
— 20: anterior part of tbe same. Z. Comp. Oc. 4, Apochr. 16. 
— 21: same part, ventral aspect. 
— 22: posterior part of first pupal stage (B), from below (stat. 80). Z. 
Comp. Oc. 4, Apochr. 8. 
— 23: first pair of abdominal (tboracic) feet of tbird pupal stage (I)); 
same specimen as Fig 14. Z. Comp. Oc. 4, Apochr. 8. 
— 24: posterior part of fourth pupal stage (F), ventral aspect (st. 76), 
same specimen as fig. 15. Inside tbe left foot of tbe first pair 
{p x ) are indicated tbe outlines of tbe same foot of tbe enclosed 
copulatory stage. Z. Comp. Oc. 4, Apochr. 8. 
