207 



21. Leptosynapta roxtona n. sp. Roxton Passage, Vancouver. 



22. variopatina n. sp. Long Reef, Australia. 



23. jacksonia n. sp. Port Jackson 



24. reducta n. sp. 



25. — irregularis n. sp. 



As we do not know the number of the tentacles in roxtona, 

 this species is found two times in the key, both in the group with 

 10 tentacles and in that with 12 tentacles. 



Key to the species of Leptosynapta. 



1. Tentacles ten (9—11) 2 



Tentacles twelve (11 — 13) 5 



2. European species 3 



American species 4 



3. Digits wanting, beside anchors and plates small perforated plates 



with four holes minuta 



Digits present, 2 — 4 on each side of tentacle. No small perforated 

 plates decaria 



4. Anchors and plates small (up to 150 /*); not different in the two ends 

 of the body. Anchor-plates often more or less reduced in the 



articular end (Fig. 32. 11) transgressor 



Anchors in posterior end of specimen ca. 220 long. The plates 

 never reduced or Labidoplax-Uke roxtona 



5. European species 6 



Australian and Indo-Pacific species 9 



American species 16 



6. Anchors not more than 500 /' in length 7 



Anchors 500 — 800 ^ in length macrankyra 



7. Anchors not more than 300 f 1 in length. Intestine without a loop inhaerens 

 Anchors 300—500 /' in length. Intestine with a loop 8 



8. Anchor-plates of anterior end of body in the main smooth., bergensis 

 Anchor-plates of anterior end of body with serrate edge .... galliennii 



9. Rods wanting, miliary granules small ca. 7 ft large bodies. Anterior 



end of specimen nearly black ictinodes 



Rods present. Colour not blackish 10 



10. Rods in posterior end of body more or less bent, and often "chela- 

 shaped". Their ends not perforated 11 



Rods in posterior end of body irregularly shaped; often with perforated 

 ends latipatina 



11. Outline of rods in digits usually smooth, very seldom weakly undulating 

 and never with distinct knobs 12 



