FLEMINGER and HULSEMANN: FOUR SIBLING SPECIES OF POSTELLINA 



20° -... -i :-..- .-., 60° 10'^° 140° 180° '40° 100° 60° 20° 0° 20° 



Figure 8. — PontelUna platychela sp.n. Geographical distribution of captures recorded during the present study. 



collections is that the abundance of platychela 

 is generally similar to the numbers of Pt>)itel- 

 li)m in the Indian and Pacific Oceans (cf. Tables 

 14, 18), i.e., typically less than 0.2 adults per 

 m^ of water strained. 



PONTELUNA MORII SP.N. 



(Figures 9 and 1 1) 



PontelUna plumata: Mori (in part), 1937, p. 99, 

 pi. 48, fig. 1-12 only; Dakin and Colefax, 

 1940, p. 99, fig. 139. NEW SYNONYMY. 



Specimens seen: 433 adult females, 284 adult 

 males. 



Standard measurements: specimens randomly 

 selected from localities spanning the ob- 

 served geographical area of distribution. 



Total length (TL), mm: 



Prosome-urosome length ratio (PUR): 



Female 



Posterolateral corner of ThIV-V ending in a 

 short spiniform process extending posteriad or 

 somewhat medioposteriad; in contrast to pluma- 

 ta junction of spine and ThIV-V corner relatively 



79 



