Spine and seta formulas for legs 1 to 4 follow : 



Egg sacs long (650/*) , containing about 40 eggs. 



Color in life unknown. 



Male. — Unknown. 



Etymology. — ^The specific name inflatipes is 

 Latin for "swollen foot" and refers to the shape 

 of the fifth leg. 



Remarks. — This species can be separated from 

 all described species of the genus by the nature 

 of the fifth leg. Yamaguti (1963, p. 28) stated that 

 the first maxilla of Ergasilus has two setae; this 

 species has three. It does not seem justifiable to 

 erect a new genus on the basis of this character 

 difference alone but E. inflatipes can apparently 

 be further separated from all other species in the 

 genus by this difference. 



Ergasilus orientalis Yamaguti 



Figure 42 



Yamaguti (1939a, p. 393) described Ergasilus 

 orientalis from Acanthogobiu-s fammmius (Gobi- 

 idae) and Atherina hleekeri (Atherinidae) from 

 Japan. A single collection of 19 females of this 

 species from 1 specimen of Strongylmra incisaii 

 (USNM 174005) caught near the mouth of the 

 Emerald River, Groote Eylandt, Arnliem Land, 

 Australia, is reported here, plus a single collection 

 of 9 females from Pota?)W)^-haphis guianensis 

 (MCZ 8788) from Gurupa, Brazil, near the mouth 

 of the Amazon River. 



FemMe. — The description provided by Yama- 

 guti is adequate, and, except for a figure of an 

 Australian female (fig. 42) and its measurements, 

 no further description is given here. 



Total length 790 ^. Greatest width 325 ix. Cepha- 

 lon 590 p. long, 325 /* wide. Anterior portion of 

 cephalon separate lobe measuring 230 ft. by 230 /*. 

 Egg sacs 725 /x long, containing 50 to 60 eggs. 



Remarks. — No differences could be found be- 

 tween the two populations referred to E. orien- 

 talis. The South American population may repre- 

 sent a separate, apparently identical species. 



Ergasilus Sp. A 



A single female was collected from the gill fila- 

 ments of Strongylura marina (USNM 114589) 

 from Lake Yzabel, Guatemala; two additional fe- 

 males were collected from the gill filaments of S. 

 timucu (USNM 114314) from 20 miles above the 

 mouth of the Rio Sarston on the Guatemala- 

 British Honduras border. Tliis copepod appears 

 to l)e the same as the specimen described and fig- 

 ured by Thomsen (1949) as E. lizae frona Mugil 

 braziliensis from the Rio de la Plata near Monte- 

 video, Uruguay. Thomsen's material plus tlie three 

 specimens rejjorted here probably represents an 

 undescribed species, but it seems best not to name 

 it until more material is available and a complete 

 description can be provided. 



Ergasilus Sp. B 



One female from the gill filaments of Xenento- 

 don cancila (FMNH 58917) collected in Ceylon. 

 It has not been described as a new species because 

 onl}' one specimen was available. The following 

 characters were noted, however, and are presented 

 to aid future workers. 



This species is closely related to Evgwiilus coleus 

 and E. semicoleus described above. The second an- 

 tenna is sheathed nearly its entire length, but the 

 sheath is not as conspicuous as in E. coleus. The de- 

 gree of segmentation of the abdomen is intennedi- 

 ate between the lack of segmentation in E. coleus 

 and the well-defined segments of E. semicoUus. In 

 the species discussed here, the three abdominal seg- 

 ments are separate ; each of the posterior two seg- 

 ments has a single transverse row of spinules on its 

 ventral surface. The genital segment Ijeai-s two 

 transverse rows of spinules on its ventral surface. 

 The caudal rami are similar to those of E. coleus 

 and E. semicoleus. 



Ergasilus coleus also was collected from Xen&n- 

 todon in India. 



Acusicola Cressey, New Genus 



Ergasilidae. Male unknown. Female: Thoracic 

 segments bearing legs 1 to 4 free. Abdomen 

 3-segmented. First antenna 5-segme.nt«d. Second 

 antenna 5-segmented; terminal three segments 

 very short, combined length of all three about one- 

 half length of second segment. Maxilliped absent. 

 Legs 1 to 4 biramose; leg 1 endopod 2-segmented; 

 leg 4 exopod 2-segmented; all other rami 3-seg- 

 mented. Leg 5 a short papilla at the distal outer 



358 



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