NEW MARINE ISOPODS^ — ^MENZIES 111 



anthura. I therefore consider Edanthura linearis a nomen nudum. 

 Small and juvenile specimens of Par anthura elegans differ from 

 adult specimens in having very small and weakly developed seventh 

 peraeopods and sixth peraeopod propodal joints beset with one less 

 2-pointed seta on the inferior margins. 



Genus CYATHURA Norman and Stebbing, 1886 



CYATHURA MUNDA, new species 

 FiGUBES 12, 13 



Holotype. — ^Male, length 5'.2 mm., width at widest part of second 

 peraeon somite 0.5 mm. 



Allotype. — Ovigerous female, length 6.0 mm., width 0.4 mm. 



Diagnosis. — Kostral projection equaling forward extent of cephalic 

 anterolateral angles. Eyes small, number of ocelli not discerned. 

 Uropodal endopodite not extending beyond telson posterior margin; 

 exopodite posterolateral margin sinuate. Tip of stylus of male sec- 

 ond pleopod simple, lacking lobes and setae. Telson posterior border 

 concave, lateral borders smooth. Paired statocysts in anterior part 

 of telson. Maxilliped with three free joints. 



Character of hody. — Length exceeding nine times the width. Color 

 white with scattered clumps of black chromatophores, color pattern 

 distinctive. 



Cephalon. — Eyes small, number of ocelli not discerned. Rostral 

 projection bluntly angulate, equaling the forward extent of antero- 

 lateral angles. Ocular lobe in lateral view with apex anteriorly ven- 

 tral to eye. 



Peraeon. — First six somites similar in length. Seventh somite 

 slightly shorter than sixth. Second and third somites each with an 

 anterior dorsal depression for reception of the posterior border of 

 first and second somites, respectively. No keels, ridges, or pits 

 evident. 



Pleon. — The segmentation of the first five somites, although visible 

 laterally, is not discernible dorsally. Sixth somite with a pronounced 

 dorsal medial cleft on the line which separates that somite from the 

 telson. Telson dorsally slightly swollen ; lateral borders smooth, pos- 

 terior margin concave ; paired statocysts present in anterior end. 



First antenna. — Peduncle composed of three joints. In male, 

 flagellum brushlike, composed of four short setiferous joints; in fe- 

 male flagellum composed of a single joint having a setiferous knob 

 at tip, which perhaps represents another joint. 



Second antenna. — Peduncle composed of six segments. Flagellum 

 with a single, tapering, setiferous joint, which is slightly longer than 

 one-half the length of the last peduncular joint. 



MaxilUped. — Composed of three wide free joints. 



First muxilla. — Outer lobe with six marginal fingerlike teeth. 



