The Anatomy of Chlamydoselachus 



361 



Deinega's otherwise excellent figure (1909 and 1923, Fig. 5, pi. II) of the visceral 

 skeleton of Chlamydoselachus does not show clearly the limits and the relations of all 

 the basibranchials and hypobranchials, hence it cannot be used for comparison. 



bbr.5 



bbr.6? 



v.br.a.7-/-- 



.\cbr.6 



Text-figure 26. 



Ventral views of the median portions of the branchial skeletons of two specimens of 

 Chlamydoselachus to show variations. 



A — Dissection by Goodey (1910.1) of a specimen in the University of Birmingham. 



bbr.](?)-6, basibranchials of the first (?) to the sixth arch; bh., basihyoid; cbr.1-6, ceratobranchials of the first to 

 the sixth arch; /., foramen; hbr. (1) (?)-6, hypobranchials of the first to the sixth arches; th.c, thyroid con- 

 cavity ; tifca7(?), vestigial seventh branchial arch. 

 Redrawn, with some changes in labels, after Goodey, 1910.1, Fig. 6, pi. XLIII. 



B — Dissection by Garman (1913) of his second specimen in the Museum of Comparative 

 Zoology. The original is without lettering. 



bbr.2, 5 and 6 (?), basibranchials; bh., basihyoid; cbr.4 and 6, ceratobranchials; chy., ceratohyoid; /., foramen in 



basihyoid cartilage; hbr.1,2 and 6, hypobranchials; v.br.a.7, vestigial seventh branchial arch. 



After Garman, 1913, Fig. 6, pi. 59. 



