570 KIRCHENPAUER, HYDROIDA, ETC. OF E. GREENLAND. 



Suborder CtenostomatAo 

 Fam. Halcyonellese. 



25. Alcyonidium hirsutum (forma membranacea), Smitt, 



North Shannon, on Hornera. Distr, Arctic Ocean, 

 North and European Seas. 



26. A. gelatinosum, Smitt ? North Shannon on Hornera, 



an indeterminable little specimen. 



XCVI. — The Siliceous Sponges of East Greenland 

 From Dr. Oskar Schmidt's Memoir in " Die zweite 

 " deutsche Nordpolarfahrt," vol. ii., part i., pp. 429- 

 433, 1 plate. 1874. 



1. Cacospongia, sp. Interesting, as pure keratose Sponges are 

 rare in the North. 



2. Chalinula, sp. 



3. Reniera, sp. 



4. Isodictya infundibuliformis, Bowerbank. 



5. Thecophora semisuberites, Schmidt. 



6. Desmacidon anceps, n. sp."1 



7. Esperia intermedia, n. sp. > Spicules figured in pi. 1. 



8. E. fabricans, n. sp, J 



XCVII. — The Calcareous and Soft Sponges. Extracted 

 from Dr. E. Haeckel's Memoir in '' Die zweite deutsche 

 " Nordpolarfahrt," vol. ii., part ii., pp. 434-436, 1874. 



1. Ascaltis Lamarckii, Hseckel. North Shannon. North At- 

 lantic. Mediterranean. Florida. 



2. Sycaltis glacialis, H. North Shannon. Spitzbergen. 



Halisarca Dujardinii, Johnst. [Loc. ind.] Norway. 



XC VIII.— The Microscopic Organisms of the North-Polar 

 Zone, both on Land and in Deep Sea ; from the Mate- 

 rials brought home by the " Germania ; " magnified 300 

 times. By Dr. Ch. G. Ehrenberg. 1874. " Die zweite 

 " deutsche Nordpolarfahrt," vol. ii., pp. 437-467 ; four 

 plates. 



I. The soundings taken in the First Voyage, 1867, were partly 

 off the coast of East Greenland (about 73° to 75° N. lat. and 12° to 

 17° 40' W. long.), but mainly south and west of Spitzbergen. 

 From these Prof. Ehrenberg determined (p. 443) 21 Polygastrica 

 [Diatomaceas], 16 Polythalamia [Foraminifera], 2 Polycystina, 

 26 Zoolitharia, Phytolitliaria, and Geolithia [spicules of Sponges, 

 &c.], and one soft plant-remain. 



