MARINE SILVER HATCHETFISHES — SCHULTZ 635 



Polyipnus polli, new species 



Figure 13 



Polyipnus laternatus (non Garman), Poll, Expedition oceanographique Beige 

 dans les eaux c6tieres Africaines de l'Altantique sud, 1948-1949, Resultats 

 scientifiques, vol. 4, fasc. 2, Poissons, pt. 3, p. 65, fig. 27, 1953 (eastern South 

 Atlantic off Angola). — Norman, Discovery reports, vol. 2, p. 305, ? fig. 14, 

 1930 (lat. 5°54' N., long. 11°19' E.; lat. 13°25' N., long. 18°22' W.). 



Holotype: KMMA 95092, Eastern Atlantic Ocean, lat. 6°8' S., 

 long. 11°24' E., depth 350 to 380 meters, standard length 22 mm. 



Paratypes: KMMA 95091, Eastern Atlantic Ocean, lat. 5°53' S., 

 long. 11°28' E., depth 310 to 360 meters, 1 specimen, standard length 

 22.5 mm. USNM 179878, lat. 11°53' S., long. 15°26' E., depth 480 to 

 510 meters, Dec. 18, 1948, 1 specimen, 26 mm. IRSNB 8675, lat. 

 5°15' S., long. 11°29' E., depth 225 to 240 meters, 1 specimen about 

 17 mm., in poor condition. IRSNB 8687, lat. S°28' S., long. 12°54 / E., 

 depth 310 meters, 1 specimen, about 21 mm., in very bad condition. 

 IRSNB 8671, lat. 5°53' S., long. 11°28' E., depth 310 to 360 meters, 

 1 specimen, 17.7 mm. 



Description : Measurements made on the holotype and paratype 

 are given in table 7, p. 638; counts made are given in table 1, p. 591, 

 and table 6, p. 636. 



Color: The color pattern is shown in figure 13, p. 628. 



Range: This species is known from the eastern South Atlantic 

 off Anglo, Africa, at a depth of 225 to 510 meters. 



Remarks: This species is most closely related to asteroides and 

 laternatus, both known from the Atlantic Ocean. It differs from 

 them in having only seven anal photophores, a deeper body, and a 

 deeper caudal peduncle, as is shown in the following tabulation: 



polli laternatus aHeroides mitsukaral 



Greatest depth of body in 0. 9 to 1. 1. 1 to 1. 4 1. 1 to 1. 4 1. 1 to 1. 2 



length of body without 



head 

 Width of group of anal photo- 4 3 3 2. 4 to 2. 8 



phores in greatest depth 



of body 

 Least depth of caudal ped- 5. 3 to 6. 4 6. 5 to 7 6. 5 to 7 5. 8 to 6. 5 



uncle in length of body 



without head 



This species is distinguished in the key on p. 621 from all other known 

 species in the genus. It is named polli in honor of my esteemed 

 colleague, Dr. Max Poll, who loaned the specimens to me for study. 



577377—61- 



