112 



BULLETIN 180, UNITED STATES NATIONAL MUSEUM 



Genus PLESIOPS Oken 



Plesiops Oken, Isis, 1817, App. p. [1182a]. 



PLESIOPS NIGRICANS (Rnppell) 



Pharopteryx nigricans Ruppkll, Atlas zu der Ileise im nordlichen Afrika, Fische, 

 p. 15, pi. 4, fig. 2, 1828. 



115391, Tutnila Island, reef at Alofau, June 3, 1939, 12 specimens (longest 

 121 mm. in standard length, 160 mm. in total length). 



115388, Canton Island, reef of wide shallow channel, May 13, 1939, 4 speci- 

 mens. 



115387, Canton Island, reef at ocean, April 25-28, 1939, 1 specimen. 

 115390, Hull Island, channel, July 8-12, 1939, 5 specimens. 



115389, Tutuila Island, reef at entrance Pago Pago Bay, June 2, 1939, 2 speci- 

 mens. 



52437, Apia, Samoa, Jordan and Kellogg, 16 specimens. 

 52408, Apia, Samoa, Jordan and Kellogg, 28 specimens. 



APOROPS, new genus 



This new genus differs from all other forms of Pseudochromidae 

 with VII dorsal spines in the increased number of soft fin rays, 23 





■-^SSfc 



v. — I. t^ J-..-t.J, 1^< 



Figure 9. — Aporops bilinearis, new species: Holotype (U.S.N.M. No. 115336), 51.6 mm. 



in standard length. 



or 24 in the dorsal and 19 or 20 in the anal fin, as well as in several 

 characters presented in the preceding key. Other characters of the 

 genus are those of the new species. 



Named Aporops in reference to the lack of a large pore in the 

 interorbital next to the eye. 



APOROPS BILINEARIS, new species 



Figure 9 



Holotype. — A specimen (U.S.N.M. No. 115336) 51.6 mm. in standard 

 length, taken July 12-15, 1939, by Leonard P. Schultz on the reef 

 at Hull Island. 



In addition, the following paratypes were collected: U.S.N.M. 

 No. 115335, from Canton Island lagoon, April 23 to May 12, 1939, 

 1 specimen, 54.8 mm. (standard length) ; U.S.N.M. No. 115337, 

 from Canton Island reef. May 13, 1939, 1 specimen, 4G.3 mm.; 

 U.S.N.M. No. 115338, from Rose Island reef, June 11-14, 1939, 4 



