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Show 378 DR. B. C. A. WINDER ANn MR. F. G. PARSONS ON THE [Apr. 6, Sterno-mastoid.-This muscle rises from the anterior part of the sternum and is inserted into the occipital curved line, the para-mastoid, and sometimes the paroccipital process ; it may be more or less fused with the cleido-mastoid at its insertion. Among the Viverridae Meckel (XXXIX.) has noticed that the sterno-mastoid consists of two layers, superficial and deep, in Herpestes (22), and we have confirmed his observation in H. nepalensls (23) and griseus (24). In Genetta vulgaris (18) the same arrangement exists, but it was not noticed in Paradoxurus typus (19, 20) or Fig. 4. GEN .HVO/D.^ GEN.HY GLOS ST*GLOSS O/G/f-5TRIG HYO. 610S THY. MY . D/6fl6T/?/G (CUT.) HY. THV OAfO.rYY. Throat-muscles of Lutra vulgaris. Cryptoprocta (10) ; and neither Young (VIII.) nor Macalister (IX.) make any mention of a bilaminar condition in Viverra (12, 13). Cuvier and Laurillard (XII.) figure the trapezius as rising from the sternum in the Genet, and Lucae (XXXVI.) does the same in the Otter, so that probably the explanation of tbe bilaminar sterno-mastoid is that the superficial layer is really trapezius, and that in those animals in which the muscle is unilaminar the sterno-mastoid and trapezius have completely fused. In many cases the sterno-mastoid is fused with its fellow of the opposite side near its origin in the posterior part of the neck; this seems to occur most often among the Hyaeuidae, Canidae, Ursidae, Procyon-idse, and Mustelidse, though it does not always happen in these families-for instance, the two sterno-mastoids were fused in the |