PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 3 



KEY TO THE FAMILIES OF NOTOCRINIDA 



o'. Large, arms 125 mm. or more in length; gonads situated on the arms at the bases of the pinnules; 

 pinnules numerous, 50 or more on each side of an arm; ventral perisome of the pinnules with 

 conspicuous bandlike side plates, 3 or 4 to each segment, not in lateral contact, each with a 

 small covering plate beyond it; oral pinnules with most of the segments much broader than 

 long; distal portion of the cirri laterally compressed (coasts of the Antarctic continent and 

 adjacent islands; 80-640 (?731) meters) Notocuinidae, (p. 3) 



o^. Small, arms not more than 30 mm. in length; gonads on the pinnules at some distance from the 

 arms; pinnules few, not more than 25 on each side of an arm; ventral perisome of the pinnules 

 without calcareous deposits, or with a few small spicules; oral pinnules with all the segments 

 beyond the first longer than broad, most of them much elongated; distal portion of the cirri 

 flattened dorsoventrally (southern coast of Australia, north to Manning river. New South 

 Wales, and Fremantle, Western Australia; 9-40 meters) Aporometridae, (p. 19) 



Family NOTOCRINIDAE Mortensen 



Notocrinidae Mortensen, Wiss. Ergeb. schwed. Sudpolar-Exped. 1901-1903, vol. 6, Lief. 8, 1918 

 p. 10 (diagnosis). — Gisl£n, Zool. Bidrag Uppsala, vol. 9, 1924, pp. 80, 85, 91, 101,118,167,192, 

 193, 205, 213, 231, 240 (discussion); Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 1927, p. 41.— 

 A. H. Clark, Journ. Linn. Soc. (Zool.), vol. 36, 1929, p. 664. — Gisl£n, Kungl. Fysiogr. Siillsk., 

 new ser., vol. 45, No. 11 (Lunds Univ. Arsskr., new ser., Avd. 2, vol. 30, No. 11), 1934, p. 18. — 

 Ekman, Tiergeographie des Meeres, 1935, p. 308. — A. H. Clark, John Murray Exped. 1933-34, 

 Sci. Reports, vol. 4, No. 4, 1937, p. 103; Sci. Rep. Australasian Antarctic Exped., 1911-14, 

 ser. C, vol. 8, pt. 4, 1937, p. 6. — Mortensen, Kongl. Danske Vid. Selsk. Skr., nat. math., ser. 9, 

 vol. 7, No. 1, 1937, p. 63 (larvae in relation to those of Lampromelra klunzingeri. — John, Proc. 

 Linn. Soc. London, sess. 149, pt. 2, 1937, p. 86; Discovery Reports, vol. 18, 1938, pp. 124, 126 

 (all spp. viviparous); Rep. B.A.N.Z.A.R.E. 1929-31, ser. B, vol. 4, pt. 6, 1939, p. 207.— 

 GiSLfiN, Rep. Swedish Deep Sea Exped., vol. 2, Zool., No. 4, 1951, p. 55. — Hyman, 

 The invertebrates, vol. 4, Echinodermata, 1955, p. 95. 



Diagnosis. — A family of the superfamily Notocrinida including lO-armed species of 

 moderate or large size with the arms up to about 200 mm. in length; the gonads are 

 situated on the arms at the bases of the pinnules; the pinnules are numerous, 50 or 

 more on each side of an arm; the ventral perisome of the pinnules carries conspicuous 

 bandlike side plates, not in lateral contact, 3 or 4 to each segment, each with a small 

 covering plate beyond it; the oral pinnules have most of the segments much broader 

 than long; and the distal portions of the cutI are laterally compressed. 



Geographical range. — Coasts of the Antarctic continent and nearby islands. 



Bathymetrical range. — From 80 to 640 (?731) meters. 



History. — The history of the family Notocrinidae has been given in the remarks 

 under the superfamily Notocrinida. 



Genus NOTOCRINUS Mortensen* 



Notocrinus Mortensen Vid., Medd. Nat. Foren. K0benhavn, vol. 68, 1917, pp. 205-208 (diagnosis; 

 type species A'', virilis; discussion) ; Wiss. Ergeb. schwed. Sudpolar-Exped. 1901-1903, vol. 6, 

 Lief. 8, 1918, pp. 2-10 (detailed account); Studies in the development of crinoids, 1920, pp. 49-53, 

 pis. 2'i-26 (larval stages).— Bather, Nature, vol. 107, No. 2683, 1921, p. 132 (review of Morten- 

 sen). — A. H. Clark, The Danish 7n(/o;/-Exped., vol. 4, No. 5, Crinoidea, 1923, p. 43 (locality). — 

 GrsLfiN, Zool. Bidrag Uppsala, vol. 9, 1924, pp. 39, 56, 85, 91, 118, 167, 193, 206, 222, 236, 284 

 (discussion). — Mortensen and Lieberkind, Die Tierwelt der Nord- und Ostsee, Lief. 12, 1928, 



*See also Addenda (p.S36) under 1902, 1963. 



