'lllh; ( lllSMorXKA (CllIMAKltOlDS). 97 



ingslondcr in llic lail. I'ccliirals lurKi', fi'ce. First dnrsal near the occipul, short, 

 with a stroiit;; spine, erectile. Secniid dorsal short. Anal lin lartlier hack than 

 the dorsal, distinct from the suhcandal. Teeth with the tritors i-eceivinR the 

 impact on the sides instead of thi' edtics. Ti'itors of ])alatines and mandibulars 

 on the sitles of the laminae. Lateral lines tuhnlar. Xotochord without rings. 

 Hemispheres of the brain nearer to the ojttic lobes than to the olfactories, con- 

 nections sleiuler. (/'authil axis slightly raised from the le\-el of that of the body. 

 Male with slender sim|)l(- clas])ei-s, appearinu; as if I'olled into a tube, jointeil 

 near the end; and with a frontal tenaculum and two |)repel\'ic tenacula. 



r.\LLORYNCHUS. 



CaUonjuchus Gronovius, 17.")4, JMiis. Iclilli., 1, p. ."ill; 17;">ti, Mus. li-lilli., 2, \>. 12; 17(i:!, Zo(i]ili., 1, p. 

 31; LiNNB, 17.50, Sy.stcnui, cd. !), )i. 42; Cuv., 1,S17, K. An., 2, p 1 ID. 



Until other genera are adde(.l the characters of tiie family are those of the 

 g<>nus. Body and head somewhat deeper than wide. \'omerine teeth unlike 

 those of ("himaera, without the rods, so called. Mantlibulai' and jialatine dental 

 laminae with one to two tritors each. In young stages, and in some species 

 throughout life, the tritors are longitudinal parallel bars on the side of the lamina. 

 With age and use in some species the ti'itors i)osterioi'ly (>x])and until contiguous 

 tritors of certain pairs meet and fuse to form doubled, u-shajied tritors with the 

 prongs extended forward. Because of sucli clianges the identification of species 

 either living or fossil by the teeth should be undertaken only with great caution. 

 These modifications were described and figured bj' Garman, 1904, Chismopnea, 

 Bull. AI. ('. Z., 41, p. 2.5()-257, i)lates 6, 7. A more or less ])roduced lobe on 

 the subcaudal fin. < 'audal filament moderate to short or absent. Frontal 

 tenaculum of male with a wide stem and a Ijroad articidation. 



Tritors two on each palatine tooth, not fused in atlults 

 Pectoral fins not reaching the xi'iitrals 



Tritors strong, longitudinally parallel bars . . . siiti/iliii 



Tritoi's on the palatines fusing in adults 



Pectorals reaching beyond mid bases of ventrals 



Tritors with thick une(iual prongs, outer sliorter 



Origin of first dorsal little behind that of the pectoial 



cullorijNchus 

 Pectoi'als reaching nearly to mid base of ventrals 



Tritors with long slender ])ointed prongs, subequal 



Origin of first dorsal forward of entls of pectoral bases 



capcnsis 



