360 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Host. — Three females, one with egg strings, were taken from 

 the gills of a hogfish, Lachnolaimiis maximus (Walbaum) . 



Remarks. — This species is quite different from H. linearis, which 

 Wilson (1913) described from the hogfish. It more nearly resem- 

 bles his H. iridescens, but it also differs from that species in shape 

 of the head, the shape of the second antennae, the position and 

 armature of the swimming legs, the shape and armature of the 

 caudal rami, and the nature of the egg strings. The shape of the 

 head and the second antenna are like those of H. pygmaea T. and 

 A. Scott (1913), but the setation of caudal rami, antennae, and 

 legs differ, as does the number of eggs. 



HATSCHEKIA EXIGUA, new species 



Figure 74, /, m 



Female. — Head about one-fourth of total length, slightly nar- 

 rower than body, with lateral margins expanded into low blunt 

 lobes somewhat posterior to the middle. First two segments of 

 thorax narrower than regions anterior and posterior to them and 

 very short. First and second legs visible at sides of body. Cepha- 

 lothoracic plate almost straight with a shallow antero-median 

 notch, two lateral protuberances just anterior to the middle, and 

 an incurved posterior margin. Postcephalothoracic portion of body 

 without any trace of segmentation, widest at the anterior third, 

 sharply tapered at the posterior end. Caudal rami minute, more 

 than twice as long as wide, with one long and three short termi- 

 nal setae. 



First antenna 3-segmented, with 0, 2, and 4 setae. Second an- 

 tenna with basal segment narrow in its middle; terminal hook 

 large at base, sharply bent, and acute. Mouth tube in front of 

 maxillipeds, wider at base. Maxillipeds with second segment wide, 

 with curved margins ; distal segment slender, with a terminal spine 

 that has a serrate margin. 



First legs biramous, with slender rami. Second legs biramous ; 

 basipod with a terminal seta ; exopod 2-segmented, with a long and 

 a short terminal seta ; endopod 2-segmented, with a terminal circle 

 of about seven short spines. Eggs large, 8-10 in a string. 



Measurements: Length of body 0.93 mm.; length of cephalo- 

 thorax 0.21 mm. 



Male. — Unknown. 



Ti/pe.— U.S.N.M. No. 88531. 



Host. — Three females were taken from the gills of a squirrelfish, 

 Holocentrus ascensionis (Osbeck). 



Remarks. — This species resembles H. oblonga Wilson (1913), 

 but it differs in the smaller number of segments in the first an- 



