332 MEMOIRS OF THE CARNEGIE MUSEUM. 



forward in the actual fossils as it is in the restoration." (Ann. Mag. Nat. Hist., 

 1910 (8) Vol. VI, p. 486.) 



This species is not represented in the collection of the Carnegie Museum, but 

 there has sometimes been included under it a closely allied form which is here 

 considered as specifically distinct, and the discussion of which immediately follows. 



6. Amphistium bozzianum Massalongo. 



(Plate XLV, Fig. 4.) 



1859. Amphistium bozzianum A. B. Massalongo, Spec. Photogr. Anim. Foss. Agr. 



Veron., p. 37, pi. XIII, fig. 2. 

 1887. Amphistium bozzianum A. de Zigno, Mem. R. Istit. Veneto, Vol. XXIII, p. 14. 

 1901. Amphistium bozzianum. A. S. Woodward, Cat. Foss. Fishes Brit. Mus., 

 Vol. IV, p. 435. 

 T^Jpe. — Nearly complete fish; Carnegie Museum. (Cat. No. 5308). 

 This species appears to be known only by the original holotype, which is now 

 the property of the Carnegie Museum. It is of relatively small size, measuring 

 only about 5 cm. in length from the extremity of the snout to the base of the caudal 

 fin. By Belotti it was regarded as an immature example of A. paradoxum Agassiz, 

 but its claims to recognition as a distinct species were re-affirmed in 1879 by Baron 

 de Zigno, and his views are fully confirmed by the present writer's examination 

 of the holotype. 



This latter has a less deep body than A. paradoxum, the vertebral column and 

 its neural and hsemal arches are more delicately constructed, the caudal fin is 

 relatively smaller and the dorsal and anal more elevated, and the number of dorsal 

 fin-rays is greater (twenty-eight as compared with twenty-three) than in A. para- 

 doxum. It is to be noted that the paired fins and bones of the head are much more 

 clearly displayed in Massalongo's holotype than in the original of A. paradoxum 



figured by Agassiz. 



Genus Ductor Agassiz. 



7. Ductor leptosomus Agassiz. 

 1796. Callionymus vestence G. S. Volta, Ittiolit. Veronese, p. 140, pi. XXXII, fig. 2 



(error e). 

 1796. Gobius smyrensis G. S. Volta, ibid., p. 241, PI. LVIII, fig. 2 (errore). 

 1818. Callionymus vestince H. D. de Blainville, Nouv. Diet. d'Hist. Nat., Vol. 



XXVII, p. 359. 

 1818. Gobius smyrensis H. D. de Blainville, ibid., p. 358. 

 1834. Ductor leptosomus L. Agassiz, Verhandl. Ges. vaterliind. Mus. Bohmen, p. 66 



(name only). 



