XIV LIST OF ILLUSTRATIONS. 



Page. 



Mayrellus mirabilis, antenna of female 238 



Mayrellus mirahilis, female 238 



Scisena mitsukurii 248 



Scisena albiflora 250 



Sciaena manchurica 256 



Scieena nibe 258 



Side view of a female Ergasilus manicatus, showing body regions: A, abdomen; 



C. T., cephalothorax; E. C. egg cases; F. T., free thorax; G. S., genital segment. 270 

 Dorsal siu-face of carapace in Ergasilus centrarchidarum, showing the large an- 

 terior shield connected with the bases of the second antennae 271 



Dorsal sm'face of the genital segment of Ergasilus centrarchidarum, showing the 



complex musculature, a and c, closing muscles; h and d, opening muscles. . . 272 

 Ventral surface of Txniacanthus carcharix, showing appendages. an\ first 

 antenna; an^\ second antenna; gs, genital segment; ind, mandible; mxh, 

 maxillary hook; rnxf, first maxilla; ma/^, second maxilla; vixp, maxilliped; 



1 to 5, swimming legs 273 



First antenna of Ergasilus manicatus, showing the form found in the Ergasilinx . 274 

 First antenna of Bomolochus eminens, showing the form found in the Bomolochi- 



nse and Tceniacanthime 274 



Second antenna of Ergasilus centrarchidarum 275 



Second antenna of Bomolochus nitidus 275 



Mouth-parts of Ergasilus mugilis; la, labrum; lb, labium; md, mandible; mx/, first 



maxilla; mx^\ second maxilla 275 



Mouth-parts of Bomolochus exilipes. an, second antennae; la, labrum; lb, la- 

 bium; md, mandible; ma/, first maxilla; mx''^, second maxilla; mxp, maxilliped. 

 Between the terminal joints of the mandible and second maxilla can be seen 



a hairy structm-e similar to the paragnaths in free-swimming forms 276 



Muscular system of Ergasilus versicolor in dorsal view, a, muscles moving first 

 antenna; b to/, muscles of enlarged second antennae; g to I, flexors of head 

 and fii'st two thorax segments; m, o, and r, muscles moving swimming legs; 

 m, b, transverse muscle band; n, flexor muscle of thud and fomth thorax 

 segments; p, muscles controlling the opening of the o\aduct; q, flexor muscles 

 of fifth and genital segments; s, flexor muscles of abdomen; t, accessory muscle 



of second antenna 286 



Muscles controlling opening of oviduct in Ergasilus versicolor, a and c, closing 



muscles; b and d, opening muscles 288 



Ventral surface of female Ergasilus centrarchidarum. a, median lobe of stomach; 

 b, diagonal lobe; c, lateral lobe; d, excretory tubes; i, intestine; r, rectum; s, 



stomach . .* 291 



Excretory tubes of Ergasilus centrarchidarum. a and b, from different indi- 

 viduals 293 



Median longitudinal section of Ergasilus centrarchidarum. a, anus; am, muscles 

 of second antennae; dg, digestive gland; dm, dorsal muscles; e, eye; g^ to g^\ 

 ganglia of thoracic and genital segments; gc, gland cells; i, intestine; I, lacu- 

 nae; m, mouth; n, ventral nerve cord; o, anterior end of ovary; ce, oesophagus; 

 p, protractor muscles of stomach; sbg, post (sub) esophageal ganglion; spg, 

 prae (supra) esophageal ganglion; sr, semen receptacle; st, stomach; up, 



uterine process of ovary 295 



Transverse section through the carapace of Ergasilus centrarchidarum behind 

 the mouth, dvm, dorso-ventral muscles; i, stomach; Im, longitudinal muscles; 

 n, ventral nerve cord; o, undeveloped egg cells of ovary; up, uterine proc- 

 esses 296 



