i6o 



ACTINIARIA 



Habitat 



tentacles 



nematocysts spirocysts 



actinopharynx 

 nematocysts 



|distribution of 

 the reproduc- 

 tive organ on 

 the directives 



Sukkertoppen . . 



Claushavn 



Foster's islands . 

 Corea strait . . . . 

 Behriug's sea . . . 



Ritenbenk 



Bell Sound 



Egedesminde 



Treurenberg bay 



25ofms.Torell (Locality ?) 



Duyn Point 



Fiskenses 



Ikamiut 



Greenland (without dis 

 tinct locality) 



Bredefiord 



Greenland (without dis- 

 tinct locality) 



St.47l(Romer & f 



St. 32I Schaudinn)^ 



GreetJand locality ? 



Faroe islands 



* 

 Sukkertoppen 



Murman coast (only 



tentacles) 



Ora fiord (small spec.) 

 Finmark 



Egedesminde 



42— 60x2,5(3) u 

 43—60x2,5 

 41—55x2,5 

 41—53x2,5 

 46 — 62 X 2,5 



55—67 X 2—2,5 



46 65 X 2—2,5 



38—50X2—2,5 ' 

 50—70 X 2 



50 — 68 X 2 — 2,5 

 46 — 63X2 — 2,5 



48 62 X 2 2,5 



43—60X2.5—3 



43—55 X 2.5 

 49 — 60x2 — 2,5 



43—58 X 2 

 36—54 X 2—3 

 43—58x2,5 

 46—55 X 2 (2,5) 



48 61 X2 2,5 



48—55 X 2—2,5 

 38—52 X 2,5 

 46 60 X 2 2,5 



55—67X2 

 31—43X2,5 



39—55 X 2—2,5 

 43—62x2,5 



22 x I — 1,5 — 53 X 2 — 2,5 fi 

 22 x 1,5 — 50x2 — 2,5 

 19x1,5 — 50x2,5 

 24 X 2 — 67 X 3 



22 X 1,5 — 50 X 2 — 2,5 



72 X 1,5 — 50x2 

 24 X 1,5—48x2,5 



22X1,5— 43? X 2.5 



19 X 1,5 — 46 X 2 — 2,5 



22x1,5—53x2—2,5 



42—53 X 3.5—4.5 ," 

 55—62 X 3,5 



55—66X4—4,5 

 41—50X4—4,5 



46—62 X 3,5 — 5 

 48—60 X 3,5 — 4,5 

 48—58 X 4—4,5 

 42—53 X 4—4,5 



50—67x3,5 

 46—58x3,5—4.5 



58—67 x 4,5—5 

 48 — 60 x 4.5 — 5 



48—55x4,5 



43—55x4—4,5 

 53—58x5 



43—58 x 4—5 

 46 — 60 X 4 — 5 



48—55 X 4,5 

 48—55 X 5 

 49—58 X 4,5 

 46—60 X 4,5—5 



46—58 X 4,5 



46—55x4—4,5 



48—62x3.5—4.5 



?d:o 



$d:o 



(?d:o 



$d:o 



<?<!: + 



$d:o 



(?d:? 



<?d:o 

 <?d:o 

 (?d:o 



no reprod. 

 organs 



?d + 



verrucae 



V. present, d +, d:o = reproductive organs on the directives present resp. absent. 



Genus Urticina Ehr. 



Diagnosis: Cribrinidae with well developed pedal disc and rather low body. Column with verrucae 

 or without. Acrorhagi and pseudoacrorhagi absent. Sphincter strong, palmate or pinnate. Tentacles simple, 

 thick, cylindrical, short. lyongitudinal muscles of the tentacles from ectodermal to ecto-raesogloeal (meso- 

 gloeal?). Radial muscles of the oral disc from ectodermal to meso-ectodermal. Numerous perfect mesenteries 

 decamerously (during the development hexamerously) arranged. Well developed mesenterial muscles. The 

 six primary pairs of mesenteries always sterile. The 10 or the 20 strongest pairs mostly without reproductive 

 organs. Nematocysts in the ectoderm of the tentacles and in that of the actinopharynx of very different size. 



As before pointed out, it is very difficult to distinguish Urticina from some other genera, especially 

 if the reproductive organs are lacking. The specimens provided with verrucae have certainly been confounded 

 with specimens of Cribrinopsis, sometimes also with certain species of Cribrina, and the smooth forms with 

 Epiactis- and Leiotealia-species. To him who has more closely examined the Northern species of these genera, 



