356 M. Sars on the Nurse-Genus Corymorpha and its Species, 



of the genus in many respects, especially in the annulated and 

 more contractile inferior tentacles, and the small ntimber of the 

 superior ones., which form only a single circle and terminate in 

 a knob, and approaches Tubularia, so that it appears actually 

 to form a transition between these two nurse-genera. 



5. Corymorpha nana, Alder. 



Hydractinia, sp., Johnston, Brit. Zooph. p. 463. fig. 79 a. 

 Corymorpha nana. Alder, Catalogue of the Zoophytes of Northumberland 

 and Durham, p. 18, tab. /> figs. 7> 8. 



Very small (only half an inch long), club-shaped, much nar- 

 rowed downwards ; the inferior long tentacles fifteen to twenty 

 in number; the superior short and less numerous tentacles 

 (about ten according to the figure) placed in a single circle or 

 coronet, as in my C. annulicornis. Medusa-buds unknown. On 

 the English coast. 



6. Curymurpha Januarii, Steenstrup. 

 Steenstrup, Vidensk. Meddel. fra d. naturh. For. i Kjobenh. 1854, p. 46'. 



At Rio Janeiro. This is the largest known species of the 

 genus (6 inches long), and is distinguished by the great number 

 of the inferior or long tentacles (about 80) and of the gemmi- 

 gerous peduncles (about 40), the Medusa-buds of which appear 

 to resemble those of C. nutans by the obliquely truncated ante- 

 rior margin of their bells, and those of C. Sarsii by their four 

 nearly equal marginal bulbs. 



7. Corijmorpha glacialis, Sars, n. sp. 



Proles hydriformis 4-5-poIlicaris, tentaculis inferioribus filifornii- 

 bus longissimis uniserialibus 40-.50, superioribus numerosissimis 

 brevissimis sparsis ; pedunculis gemmigeris 30-35, brevioribus, 

 crassis, iudivisis aut solummodo ramulis nonnuUis brevissimis, gem- 

 mis medusinis paucis minoribus sparsis singulis aut pluribus accu- 

 mulatis, obsitis. 



Proles medusiformis ms%\[h (nunquam decidua), pallio ovali absque 

 canalibus radiantibus et bulbis (cirris) marginalibus, undique clause, 

 in aliis animalibus altricibus ova, in aliis spermatozoa includens. 



I found this species, which is distinguished by the remarkable 

 form of its Medusa-buds, differing from those of all the preceding 

 species, during my last northern journey, in the summer of 1857, 

 in the Varangerfjord, near Nadsoe (70° N. lat.), where it occurs 

 rarely and singly at a depth of 60-80 fathoms, but pretty plen- 

 tifully at 80-120 fathoms, on a soft clayey and stony bottom ; 

 it adheres firmly with its lower extremity to particles of sand, or 

 sometimes to fine red Algae. 



