Breadth at distal end 44 42 30 ... Metacarpals: Length of first 31 28 Length of second 52 55 Length of third 52 58 Length of fourth 44 51 Length of fifth 37 39 Phalanges: Length of first phalange of first digit 27 44 Sternum: Total length [n]803 821 [o]550 [o]395 Length of manubrium 259 306 [o]203 105 Breadth of manubrium 286 333 193 128 Length of fifth segment [o]170 [p]184 [o]128 [p]92 Breadth of fifth segment 133 168 86 82 Ribs: Length of first rib (straight) 405 410 277 191 Breadth of first rib at proximal end 88 110 65 46 Breadth of first rib at distal end 63 80 40 30 Length of fifth rib (straight) 785 770 545 415 Length of ninth rib (straight) 620 620 [a] The measurements of height of vertebræ are from center of inf. margin of centrum to center of tip of spine, unless otherwise specified. [b] Last thoracic. [c] Ninth lumbar. [d] Second caudal = vert. 28. [e] Eighth caudal = vert. 34. [f] Without chevron facet. [g] Thirteenth caudal = vert. 39. [h] Sixteenth caudal = vert. 42. [i] Nineteenth caudal = vert. 45. [j] Vert. 46. [k] Edges abraded. [l] A little broken. [m] In median line. [n] Without cartilages. [o] With cartilages. [p] Left side. PHALANGEAL FORMULA. The formulas for the ossified phalanges in two American[39] and three Old World specimens are as follows: _Phalangeal formula of five specimens of Ziphius cavirostris._ Locality. I. II. III. IV. V. Newport, Rhode Island 1 6 6 4 2 Barnegat City, New Jersey 1 6 6 4 3 Villefranche, France (Haeckel) 1 5 6 4 2 Pisa Museum, Italy (Van Beneden) 1 3(?) 5 4 1 Warrington, New Zealand (Scott and Parker) 1 5 5 4 2 SUMMARY OF DIFFERENCES IN SKELETONS.