340 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



eggs measuring 31 to 34 by 15 to 19 ^t. This difference is not considered 

 of specific significance. 



No differences considered of specific value could be found to distin- 

 guish this species from P. ozakii Manter, 1934 from Epinephelus niveatus 

 from 90 fathoms at Tortugas, Florida. The body form of some of the Pa- 

 cific material tends to be wider for its length (e.g. 1.026 by 0.450, 1.103 

 by 0.562). But one specimen (fig. 13) was 1.296 by 0.465, which is more 

 like the proportions of P. ozakii. The uterus in the Pacific material 

 reaches to the anterior limit of the vitellaria or slightly beyond, which po- 

 sition is slightly more anterior than in the Atlantic form. But other char- 

 acters are identical, e.g. distribution of vitellaria, gonads, position of 

 mouth, size of eggs. 



The species is much like P. aculeatus except that the vitelline follicles 

 are in widely separated, longitudinal, lateral rows. 



Prosorhynchus aculeatus Odhner, 1905 

 (Plate 33, fig. 14) 



Host : Gymnothorax species 

 Location: Intestine 

 Locality: Charles Island, Galapagos 

 Number : 2, both in one host 



These specimens have the small rhynchus, diagonal testes, arched vit- 

 ellaria, egg size, and other characteristics of P. aculeatus. The writer 

 considers P. uniporus Ozaki a synonym of P. aculeatus. P. magniovatus 

 Yamaguti differs only in its larger eggs. P. aculeatus seems to be a widely 

 distributed species in morays. 



Prosorhynchus rotundus, new species 

 (Plate 33, fig. 15) 



Host: Rypticus safronaceus bicolor (Val.) 

 Location: Intestine 



Locality: Albemarle Island, Galapagos 

 Number: 3 specimens from a single host 



SPECIFIC DIAGNOSIS OF PROSORHYNCHUS ROTUNDUS 

 Body relatively small and broad, ovoid, rounded at each end but more 

 broadly rounded posteriorly, 0.712 to 0.825 by 0.360 to 0.367. Body, in- 

 cluding the flattened surface of the rhynchus, covered with scalelike 

 spines. Rhynchus fairly large and well developed, the flattened, exposed 

 anterior surface measuring 0.150 to 0.157 in diameter. Internal portion 



