506 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



instead of edges. Tritors of palatines in mandibulars on sides of 

 laminae. Notocliord without rings. Cerebral hemispheres nearer 

 optic lobes than to olfactories, connections slender. Lateral line 

 tubular. First dorsal advances near occiput, short, with strong 

 erectile spine; second dorsal short; anal farther back than dorsal, 

 distinct from subcaudal. Caudal axis slightly elevated from body. 

 Pectorals large, free, male with simple, slender claspers, appear as 

 if rolled into tube joined near end. Male with frontal tenaculum 

 and 2 prepelvic tenacula. 



Genus CALLORHINCHUS Lacepede 



Callorynchus Gbonow, Zoophylacii, p. 31, 1763 (species uonbinomial). (Type, 



Chimaera callorynclms Linnaeus, monotypic; Cuvier, Regne animal, vol. 



2, ed. 1, p. 140, 1817.) 

 Callorhinchus Laciepkde, Hist. Nat. Poiss., vol. 1, p. 400, 1798. (Type, Chimaera 



callorynchus Linnaeus.) 

 Callorhincus Dum^kil, Zool. Analytique, p. (101) 333, 1806. (Type, Chimaera 



callorynchus Linnaeus.) 

 Callorhyncus Fleming, Pliilos. Zool., vol. 2, p. 380, 1822. (Type, Chimaera 



callorynchus Linnaeus.) 

 Callorhynchus Cxjvier, Regne animal, vol. 2, ed. 2, p. 382, 1829. (Type, 



Chimaera callorynchus Linnaeus.) 

 Callorinchus Gbiffith and Smith, Animal Kingd. Cuvier, GrilBth's, vol. 10, p. 



97, 1834. (Type, Chimaera callorynchus Linnaeus.) 

 Callirhynchus Agassiz, Nomencl. Zool. Index, pp. 56, GO, 1846. (Type, Chimaera 



callorynchus Linnaeus. ) 



Body and head somewhat deeper than wide. Vomerine teeth 

 without rods. Mandibular and palatine dental plates with 1 or 2 

 tritors each; in some young tritors longitudinal parallel bars on 

 side of lamina, sometimes persistent. Frontal tenaculum of male 

 with wide stem and broad articulation. Caudal with more or less 

 produced subcaudal lobe. Caudal filament moderate to short or 

 absent. 



ANALYSIS OF SPECIES 



a\ Pectorals reach ventrals. 



&\ Dorsal origin forward of ends of pectoral bases ; pectorals nearly reach 

 mid-bases of ventrals ; tritors with long, slender, pointed prongs, subequal. 



capensis 

 h^. Dorsal origin little behind pectoral origin ; pectorals reach beyond mid- 

 bases of ventrals ; tritors with thick, unequal prongs, outer shorter. 



callorynchus 



&^ Dorsal origin somewhat before pectoral bases; pectorals nearly or quite 



reach ventral bases; tritors with short, thick prongs, outer very short. 



milii 



a". Pectorals not reaching ventrals ; tritors 2 on each palatine tooth, not fused 



with age, strong, longitudinally parallel bars smythii 



