PTEROElDIDAE 279 



a different group of the genus to P. griseum, whereas the first-named species is based most prob- 

 ably on a young specimen of the latter. To solve this question verj' extensive material is necessary. 

 According to the literature, P. griseum seems to be comparatively common in the Mediterranean, 

 at all events as far east as the Adriatic. In the Atlantic Ocean it has been reported from the European 

 coasts as far northwards as the Faroes (Kiikenthal 191 5), but up till now it does not seem to have been 

 reported from the coast of Africa. The species lives in tolerably shallow water, but when we consider 

 its biotope with the soft muddy bottom, and its mode of life in daylight almost entirely burrowed in 

 the mud, it is easily understood that it had hitherto escaped the investigators. The Discovery record 

 seems to indicate that P. griseum almost coincides zoogeographically with Cavernularia elegans, 

 Veretilhim cynomorium and Pennatida rubra. 



REFERENCES 



Agassiz, a., 1888. Three Cruises of the U.S. Coast and Geodetic Survey Steamer 'Blake'. Bull. Mus. Comp. Zool. Harv. 



vols, xiv-xv, pp. xxii, 314, 320. 

 Balss, H., 1910. Japanische Pennatuliden. Doflein's Beitrcige zur Naturgeschichte Ostasiens. Abh. Math. Phys. Kl. K. Bayr. 



Ak. Wiss., Suppl. I, pp. 1-106. 

 Broch, H., 1913. Pennatulacea. Rep. Sci. Res. 'Michael Sars' N. Atl. Exp. 1910, vol. in, pp. 1-9. 

 1929. Die Oktokorallen der Arktis. Fauna arctica, vol. v, pp. 143-52. 



1935- Beohachtungen an einigen adriatischen Seichtwasser-Anthozoen von Split. Biol. Gen. vol. xi, pp. 1-14. 



1953- Octocorah and Stony Corals of the High Adriatic Trawling Grounds. Ribarstv.-Biol. Eksp. 'Hvar', Isviesda, 



pp. 1-22. 



1956. Oktokorallen russischer Expeditionen im Polarmeer wdhrend der Jahre 1929-1935. Avh. Norske VidenskAkad., 



no. 4, pp. 1-18. 



1957. Pennutularians {Umbellula). Rep. Swed. Deep-Sea Exped. vol. 11, pp. 349-64. 



Broch, H. and Horridge, A., 1957. A 7iew species of Solenopodium {Stolonifera: Octocorallia) from the Red Sea. Proc. Zool. 



See. Lond. vol. cxxviii, pp. 149-60. 

 Deichmann, E., 1936. The Alcyonaria of the western part of the Atlantic Ocean. Mem. Mus. Comp. Zool. Harv. vol. liii, 



pp. 1-3 1 7. 

 Fischer, P., 1889. Note sur le Pavonaria quadrangularis et sur les Pennatulides des CStes de France. Bull. Soc. Zool. Fr. 



vol. XIV, pp. 34-8. 

 HiCKSON, S. J., 1902. The Alcyonaria and Hydrocorallinae of the Cape of Good Hope, part i. Mar. Invest. S. Air. iqoo. 



vol. I, pp. 67-96. 

 1907. Coelentera Alcyonaria. Nat. Antarct. Exp. Nat. Hist. vol. in, pp. 1-15. 



1916. The Pennatulacea of the ' Siboga' Expedition. Siboga Exped. vol. xiv, pp. i-x, 1-135. 



1918. Evolution and Symmetry in the Order of the Sea-pens. Proc. Roy. Soc. B, vol. xc, pp. 108-35. 



1937. The Pennatulacea. John Murray Exped. 1933-34, Sci. Rep. vol. iv, pp. 109-30. 



JuNGERSEN, H. F. E., 1904. PeunatuUda. Dan. Ingolf-Exped. vol. v, pp. 1-91. 



1907. Pennatuliden. Res. Voy. Belgica 1897-98-99, Rapp. Sci., Zool., pp. 1-22. 



1916a. Alcyonarian and Madreporarian Corals in the Museum of Bergen, etc. Bergens Mus. Aarb. 1915-16, Naturv. 



rffikke no. 6, pp. 1-14. 



19166. The Alcyonaria of East Greenland. Medd. Gronl. vol. xliii, pp. 487-503. 



1919. Compectus Faunae Groenlandicae. Alcyonaria, Antipatharia og Madreporaria. Medd. Gronl. vol. xliii, pp. 1156- 



212. 

 KOLLIKER, A. v., 1872. Die Pennatuliden. Anatomisch-systematische Beschreibung der Alcyonarien. Abt. I. Abh. Senckenb. 



Naturf. Ges. 1870, vols, vii, viii, pp. 85-275. 

 1874a. Ueber den Ban und die systematische Stellung der Gattung Umbellularia. Fine vorldufige Mittheilung. Verh. Phys.- 



Med. Ges. Wurzb. vol. viii, pp. 13-18. 



18746. Die Pennatulide Umbellula und zwei neue Typen der Alcyonarien. Festschr. Phys.-Med. Ges. Wurzb. pp. 1-24. 



1880. Report on the PeunatuUda. Rep. Sci. Res. Challenger, Zool. vol. i, 1-41. 



KiJKENTHAL, W., 1902. Diagnosen neuer Umbelluliden. Zool. Anz. vol. xxv, p. 595. 



1910. Pennatuliden der Deutschen Tiefsee-E.xpedition. Zool. Anz. vol. xxxvi, pp. 51-58. 



1912. Die Alcyonaria der deutschen Sudpolar- Expedition. Dtsch. Sudpol. Exped. vol. xiii (Zool. v), pp. 287-349. 



1915. Pennatularia. Tierreich, Lief, xliii, pp. vi-xv, 1-132. 



KUKENTHAL, W. and Broch, H., 1911. Pennatulacea. Wiss. Ergebn. 'Valdivia', vol. xiii, part I, pp. i-vi, 113-576. 



