r.i:.\CHIOP<>]).\ JACKSON. 199 



M. flauescem, even ill pre adult stages, these brackets are aluays closely applied to tin- 

 t-rural ba.M-s. There is a slight I ransverse cardinal prunes at tin- apex uf tlif valvr. 



ll is inn without interest tn iittti- that tin' tvpe n|' t-ariliiialia in M. jmi^ini slm\vs 

 an approach tn tin- Dallinifonn ivpe. in which tin- division nf cadi hinge-plate liv tin- 

 i_-niral liases, anil tin- failure of the supporting brackets to reach the latter, is ,-et-n tn 

 perfection. '1'lie broad character of the ascending branches of the loop is also another 

 feature me! with in l^illin/i and some other species in tin- l>allinin:r. 



One til' the characteristic lea In res of .I/, jmt/i/iii is its pnnctatinn. On tin- outer 

 surface of the shell the pores are elongate-oval ; on the inner they are roiiinl or 

 .slightly oval. The pores are close toget her. and their nninlier pt-r square niillinietiv 

 ranges from Do to 130. They are arranged generally in transverse rows following the 

 contour t.ii' the growth-lines. Blochmann [100G, p. 097] and Eichler [191 1, p. 92] give 

 a range of 1 1 (> to 13:2 for the specimens obtained by the "(iaitss" Expedition. The 

 shell-mosaic and punctse of the " Terra Nova " specimens are essentially as figured bv 

 Eichler [1011, pi. 43, fig. 17]. 



Magellania ~/nl>iiii was founded liy Blochmann in 1900 upon specimens obtained 

 at the winter quarters of the " ( lanss " Expedition, aliout 90 E., in iMO fathoms. In 

 the following year the same species was described liv Smith under the name J/. */i/i-<ifn, 

 from specimens obtained liy the " Discovery" Expedition in 100 fathoms, at Coulman 

 Island (73 30' 8., 170 E.), and in 178 fathoms at the winter quarters (78 8., 164 E.). 

 In 1898 the "Belgica" Expedition dredged one very young specimen and several 

 fragments of a Brachiopod in about 275 fathoms iu the Western Antarctic (80 AY. ). 

 lnit owing to the imperfect nature of the material the form was left unnamed. [See 

 Touliin. 1901, p. 11. pi. ii, figs. 1G-17]. The form in question evidently belongs to 

 J/"^'/f /A/// /W, and is regarded by Blochmann [1906, p. G97] as pertaining to his species, 

 M. jiiiijiinl. The ascription, however, is not altogether conclusive, but is not improbable. 

 The fragments were dredged along with specimens of Compsothyris nii'm-if-ir. 



BIBLIOGRAPHY. 



BEECHER, C. E. 1893. " IJovisimi of the families of loop-bearing Brachiopoda." Trans. Conn. Acad. 



Sci., ix, pp. 376-391. 



lir.r.ciiEii, C. E. 1901. " Studies iu Evolution." New York and London. 

 BLOCHMANN, F. 1906. "Neue Brachiopndrn dcr Valdivia- und Gjniss-Expctlition." Zool. Anz., xxx, 



pp. 6'.'n -702. 

 I'.I.IICEIMAXX, F. 190S. " Zur Systt-niatik uml Geographischen Vurbreitung dcr Brachiopodcn." 



Zeitschr. f. \viss. Zool., xc, pp. 596-(i 1 1. 



MAXN, F. 1912. "Die Brai-liiopotlen tk-r St.-hwed. Sudpolarexped., 1901-1903." Wiss. Kr^i'lm. 



Schwed. S.-P. Exped., vi, No. 7. Stockholm. 



BLOCII.MANN, F. 1914. Papers and Proe. Kuy. Soc. Tasmania, for 1913, pp. llL'-113. 

 BCCKMAN, S. S. 1910. "Antarctic Fossil Brachiopoda collected by the Swedish South Polar Expedition, 



1901-1903." Wiss. Er^elm. Srhwed. S.-P. Exped., iii, No". 7. Stockholm. 

 BUCKMAV S. S. -1916. "Terminology for Foramina! Development iu Ten-brat uloids (Brachiopoda;." 



Trans. New Zealand Inst., xlviii. (1915), Oct. 1910, pp. 130-132. 

 DALL, W. H. 1873. Proc. Acad. Nat. Sci. PLilad., p. 196. 



