. a A^)^ Fig. 2a-c. Astrochlamys bruneus, Koehler. a. Part of oral side, xS. b, Embryo, showing the five terminal plates, and in the centre the mouth, x8o. c, Arm spine, X45. Fig. 2 d. Arm spine of Astrochlamys sol, , X45. were small and star-shaped, with an indication of a mouth invagination and the first indication of the skeleton, viz. the terminal plate; but as yet there was no trace of the ambulacral skeleton or of any other plates (Fig. 2 b). There were some 200 embryos in each bursa, which means that they cannot reach any large size before they leave the mother—in conformity with t
. a A^)^ Fig. 2a-c. Astrochlamys bruneus, Koehler. a. Part of oral side, xS. b, Embryo, showing the five terminal plates, and in the centre the mouth, x8o. c, Arm spine, X45. Fig. 2 d. Arm spine of Astrochlamys sol, , X45. were small and star-shaped, with an indication of a mouth invagination and the first indication of the skeleton, viz. the terminal plate; but as yet there was no trace of the ambulacral skeleton or of any other plates (Fig. 2 b). There were some 200 embryos in each bursa, which means that they cannot reach any large size before they leave the mother—in conformity with the small size of the genital slits. The eggs are shed (into the bursae) all at a time, and this appears to be likewise the case with the sperms, none of the males being found to contain ripe sperms in their gonads. This is again in con- formity with the fact that some of the larger specimens carry no male on their back, so that copulation is not going on constantly, as is the case in Amphilycus androphorus, Mortensen, and, to a less degree apparently in Ophiosphaera insignis, Brock, and Ophiodaphne materna, Koehler (cf. Mortensen, Biological observations on Ophiurids. Papers from DrTh. Mortensen's Pacific Exped., LXiii (Vid. Medd. Dansk Naturh. Foren., 93), 1933, pp. 178-88). In these three Ophiurids the male is carried over the mouth of
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