48 Memoir Sears Foundation for Marine Research 



3 b. Lobe-like expansion of anterior margin of nostrils covering inner half of 

 nasal opening almost entirely (Fig. 1 8 C). 



Zapteryx Jordan and Gilbert 1881, p. 74.^' 



Figure g. Trygoriorhina fasciata, female, 254 mm long, 

 from Port Jackson, New South Wales (Harv. Mus. Comp. 

 ZooL, No. 982). Ventral view of anterior part of head 

 to show shape of nasal curtain, about 1.6 X- 



Figure 10. PlatyrkinoiJis triseriata, female, 452 mm long, 

 from southern California (Harv. Mus. Comp. ZooL, No. 

 36481). Nostrils and mouth, about ix. 



Khinobatos are slight, but the genus has been accepted by both Whitley (Fish. Aust., I, 1940: 169) and Fowler 

 (Bull. U. S. nat. Mus., 100 [/j], 1941 : 322); this course has the practical advantage of subtracting a few from the 

 large number of closely related species of the genus Khinobatos. 



The nomenclatural history of the generic name Zapteryx is confused. The earliest named representative of the 

 genus, Khinobatos [Syrrhina) breuirostris Miiller and Henle 1841, was placed by its authors in Syrrhina, their new 

 subgenus of the old genus Khinobatos. However, Muller and Henle failed to designate any one particular species 

 as the type oi Syrrhina. In 18S1 Garman (Proc. U. S. nat. Mus., 3, 1881: 521) revived Syrrhina for the Californian 

 Ray that had been described the year before by Jordan and Gilbert (Proc. U. S. nat. Mus., 3, 1880: 32) as Pla- 

 tyrhina exasperata but by Garman (Bull. Mus. comp. Zool. Harv., 6, 1880: 169) as Trigonorhina alnjeata, which is 



