5 5 o Memoir Sears Foundation for Marine Research 



gories is represented by a single species, -pinnata Schnakenbeck 1931°' from Walfish Bay, 

 South Africa. This species was placed by its describer in the genus Harriotta Goode and 

 Bean 1886, but we have proposed the genus Neoharriotta^^ for it because of its separate 

 anal fin. The members of the second category (without separate anal fin) have commonly 

 been distributed between two genera, Rhinochimaera Garman 1901 and Harriotta Goode 

 and Bean 1886, the former with smooth dental plates and with a series of large widely 

 spaced denticles along the upper margin of the caudal, the latter with ridges and knobs 

 (tritors) on the dental plates but without denticles along the margin of the caudal. 

 From an examination of specimens of each, we judge that these differences are sufficient 

 for generic separation.'^ 



Figure 123. Neoharriotta pinnata, mature male, 

 to show anal fin; after Schnakenbeck. 



Key to Genera 



I a. With a separate anal fin (Fig. 123). Neoharriotta Bigelow and Schroederi"" 1950. 



Equatorial West Africa and Walfish Bay. 

 I b. Without separate anal fin. 



2a. Surfaces of dental plates with ridges and rounded knobs (tritors); upper 



margin of caudal without denticles. Harriotta Goode and Bean 1886, p. 550. 



2 b. Surfaces of dental plates smooth or nearly so, without evident ridges or knobs 



(tritors) ; upper margin of caudal armed with a series of large denticles (Fig. 



122), many of them with double cusps. Rhinochimaera Garman 1901.^"! 



Japan and Northeast Atlantic; perhaps 

 also Bay of Bengal. 



Genus Harriotta Goode and Bean 1886, 1895 



Harriotta Goode and Bean, Proc. biol. Soc. Wash., J, 1886: 104, "a long-rostrated chimaeroid fish," without 

 further description and without a species named; Proc. U. S. nat. Mus., ly, 1895 : 472; Smithson.Contr. 



97. Mitt. zool. Mus. Hamburg, 44, 1931: 39; Poll, Result. Sci. Exped. oceanogr. Beige C6t. Afr. Atlant. (1948-49), 

 1951: 144-149. 



98. Bigelow and Schroeder, Bull. Mus. comp. Zool. Hajv., 103, 1950: 406. 



99. We have at hand an excellent specimen of Rhinochimaera pacifica (Mitsukuri) 1895. 



loo. Bull. Mus. comp. Zool. Harv., 103, 1950: 406. Only one species is known, pinnata Schnakenbeck (Mitt. zool. 

 Mus. Hamburg, 44, 1931: 39, fig. 6, 40), from deep water. 



Id. Proc. New Engl. zool. Club, 2, 1901 : 75. Two species are known: K. pacifica (Mitsukuri) 189J (Zool. Mag. Tokyo, 

 7, 1895: 97, pi. 16), from Japan; and K. atlantica Holt and Byrne 1909 (Ann. Mag. nat. Hist., [8] 3, 1909: 279; 

 Fish. Ireland Sci. Invest. [1908], 4, 1910: 18, pi. 3), from the Irish Atlantic slope. An egg case from the Bay 

 of Bengal, 561 fathoms, reported tentatively by Alcock and Wood-Mason (Ann. Mag. nat. Hist., [6] 8, 1S91: 

 21-22) as Callorhynchus {}) and subsequently named C.indicus by Garman (Mem. Harv. Mus. comp. Zool., 24, 

 1899: 21) seems more likely to have belonged to some rhinochimaerid, both because of its general appearance 

 and on geographic grounds, Callorhinchus not being known to occur anywhere north of the equator. But it 

 may have been either a Rhinochimaera or a Harriotta, so far as we can judge from the illustration. 



