See Hunterius Biscayensis (Balaena Biscayensis, Gray, 

 /. c. 89) . Hab. North Atlantic. Mus. Copenhagen, jun. 



IV. Capeeea, Gray, I. c. 78, 101; Lilljeborg, N. Acta 

 Upsal. vi. 1867. 



First rib . Baleen ? Tympanic bones irregu- 

 lar, rhombic ; aperture irregular, much contracted at the 

 upper end ; the wide part not half the length of the bone. 

 " Cervical vertebrae all united. First rib single at the 

 upper, and very broad at the lower end. Bladebone (acro- 

 mion) rudimentary. Coracoid process none." — Lilljeborg. 



1. Caperea antipodarum, Gray, I. c. 101, fig. 9. Ba- 

 laena antipodarum, Gray, Dieffenbach, t. 1. Hab. New 

 Zealand. Skeleton, Mus. Paris. 



V. Macleayius, Gray, I.e. 103, 37. 



First rib . Baleen ? The upper and lateral 



process of the atlas vertebra broad and truncated. 



1. Macleayius australiensis, Gray, I. c. 105 (figs. 10, 

 11), 371 (figs. 74, 75). Hab. Australian Seas. 



Suborder II. BALffiNOPTEROIDEA. 



(Balcenopteridce, Gray, I. c. 61, 106.) 



Dorsal fin distinct. Belly longitudinally plaited. Baleen 

 short, broad. Maxillary bones broad. Pectoral fin 

 lanceolate ; fingers four. Vertebrae of the neck free. 



Tympanic bones oblong or ovate. 



III. Eschrichtius, Gray, I. c. 113, 131 ; Lilljeborg, 

 N. Acta Upsal. vi. 12, 1867. 



Bladebone with large coracoid process. Body of cer- 

 vical vertebrae separate, small, roundish-oblong. The 

 neural canal very broad and high. 



1. Eschrichtius robustus, Gray, I. c. 133 (fig.), 373; 

 Lilljeborg, N. Acta Upsal. 1867, vi. 16, t. 1-8. Hab. 

 North Sea, coast of Devonshire, Sweden. 



Family III. PHYSALINID^E. 

 (Physalina, Gray, /. c. 114, 134.) 



Dorsal fin high, erect, compressed, falcate, about three- 

 fourths the entire length from the nose. Pectoral 

 fin moderate, with four short fingers, of four or six 

 phalanges. Vertebrae 55 or 64. Cervical vertebrae 

 not anchylosed. Neural canal oblong, transverse. 



* Vertebra 60 or 64 ; first rib single-headed. 



I. Benedenia, Gray, I. c. 114, 135. 



Rostrum of skull narrow, attenuated, with straight 

 slanting edges. Second cervical vertebra with two short 

 truncated lateral processes. The first rib single-headed. 



1. Benedenia Knoxii, Gray, I. c. 138, figs. 24-26. B. 

 Boops, Tab. 32. f. 1, 2 (cervical vertebrae). Hab. North 

 Sea, coast of Wales. 



Family II. MEGAPTERIDvE. 

 (Megapterina, Gray, I. c. 113.) 



Dorsal fin low, broad. Pectoral fin very long, with four 

 very long fingers of many phalanges. Vertebras 

 fifty or sixty; cervical vertebra often anchylosed. 

 Lateral pi - ocesses of the axis tardily ossified. Neural 

 canal large, high, triangular. Ribs fourteen or fifteen. 



II. Physalus, Gray, I. c. 114, 139; Lilljeborg, N. Acta 

 Upsal. 1867, p. 72. 



Rostrum of the skull narrow, attenuated, with straight, 

 sloping sides. Second cervical vertebra with a broad 

 lateral process, with a large perforation at the base. 

 First rib single-headed. Sternum trifoliate, with a long 

 slender hinder process. 



I. Megaptera, Gray, I.e. 113, 117; Lilljeborg, N.Acta 

 Upsal. 1867, vi. Hump-backed Whale. 



Bladebone without acromion or coracoid process. 

 Body of cervical vertebrae subcircular. 



1. Megaptera longimana, Gray, I. c. 119 (fig.), 373. 

 M. Boops (Tab. 30, baleen and jaws with rudimentary 

 teeth; T. 33. f. 12, vertebra). Hab. North Sea. 



2. Megaptera Novse-Zelandise, Gray, I. c. 128. fig. 



II. Poescopia, Gray, I. c. 113. 



Bladebone with small coracoid process. Body of cer- 

 vical vertebrae nearly square. 



1. Poescopia Lalandii, Gray, I. c. 126 (fig.), 373 (Tab. 

 33. f. 3, 4, vertebrae, from Cuvier). Hab. Cape of Good Hope. 



f Lateral rings of the second cervical vertebra as long as 

 the diameter of the body of the vertebra. Gray, /. c. 374. 



1. Physalus antiquorum (Tab. 1. f. 6, baleen; T. 32. 

 f. 5, 6, cervical vertebrae), Gray, I. c. 144 (figs. 29-32), 

 374. Ribs 14.14. Hab. North Sea, Greenland, Hamp- 

 shire, &c. 



2. Physalus Duguidii, Gray, I. c. 158 (figs. 33-35). 

 Ribs 15 . 15. Hab. North Sea, Orkneys. 



ft The lateral rings of the cervical vertebrce shorter than the 

 diameter of the body of the vei'tebrce. Gray, /. c. 374. 



3. Physalus patachonicus, Gray, I.e. 374 (figs. 76-86). 

 Hab. River Plata. 



