94 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxm. 



are three small papillte near together, and lateral to each of these groups 

 is a single papilla. Three pairs of pre-anal papilla^ were made out, 

 the bursa ))eing, on all observed cases, between the two anterior pairs. 

 The eight papilhe near the anal aperture were less distinct than either 

 the pre- or post-anal papillae, and were not always clearly made out. 

 Between the anal aperture and the bursa there are strong diagonal 

 muscles running from the lateral region medio-caudad. Spicules 

 about equal. 



The tirst sections of a series of transverse sections show the bilabiate 

 mouth with an elongate aperture (tig. 8). The chitinous walls of the 

 pharj'nx soon give evidence of a trifid division (tig, 5>). The lumen of 

 the esophagus biH'omes tri radiate (tig. 10), each of the three divisions 

 having two semicircular thickenings of the chitinous lining, which indi- 

 cate the presence of six longitudinal chitinous ridges in the lining of 

 the esophagus extending from the pharynx to the base. A series of 

 sections made from one of the Beaufort specimens was compared with 

 a series made from a specimen from MycteToperca apua^ and was found 

 to agree. 



I have found a nematode at the Tortugas which agrees with this 

 species very closely. 



NOTES ON HABITATS. 



DipJodus sargus. 



July 13, one, female. Dimensions in millimeters, life: Length 8; 

 diameter, anterior 0.12, middle 0.3, at anal aperture 0.12; length of 

 esophagus 0.8; distance from anal aperture to posterior end 0.27; 

 distance of reproductive aperture from posterior end 3. 



Julj^ 14, one, male. Dimensions in millimeters, life: Length 4, 

 length of esophagus 0.6; diameter, anterior 0.10, middle 0.16, at 

 anal aperture 0.09; distance of anal aperture from posterior end 0.15; 

 length of spicules 0.42. 



July 24, two, male and female; length in balsam, 3 and 8 mm. 

 Holocev trus. ascenscionis. 



July 31, one, male. This specimen may belong to a different spe- 

 cies. It was not in good condition, but appeared to agree with those 

 from Dlplodus^ etc. Transverse sections show the lumen of the esoph- 

 agus as a narrow slit with nearly parallel sides until near the base, 

 where it has a tendency to become triradiate. 

 Lycodontls unoringa. 



August 3, one, male; length 5.27 nun. 

 Mycteroperca apua. 



July 2, four; July 22, one. 

 Neoniaenis griseus. 



July 14, four; Jul}^ 27, two; August 3, one. 



