LARVAE OF DECAPOD CRUSTACEA 



437 



Genus Parribacus Dana? (Fig. 42) 

 General characters of the Phyllosoma. 



Fore-body pear-shaped, narrow in front, narrower than hind-body. Hind-body 

 very deeply hollowed behind. Abdomen small and narrow, completely sunk in 

 hollow of hind-body. 



Segment 2 of antennular peduncle slightly longer than segment 3. Antenna 

 small, basal part widened in late stages. 



Stage VIII? Stage IX? 



Fig. 41. Thetius sp.?, Stages VIII-IX?. 

 a. Antennae. b. Maxilla, etc. c. End of leg i, Stage IV?. 



Maxillule without palp. Maxilla without setae, not widened in any known speci- 

 mens. Maxillipedes 2 and 3 without exopod. Leg 5 fully developed, with setose 

 exopod (in all known specimens), and seated at a distance from abdomen. Pleopods 

 and uropods greatly delayed in appearance. 

 Only three specimens of this Phyllosoma were taken by the 'Discovery II', at the 

 following stations : 



St. 691. 0° 25' S, 29° 56' V/. One, 15 mm. 

 St. 1576. 14° 42' S, 42" z2' E. One, 20 mm. 

 St. 1582. 5° 39' S, 46" 22' E. One, 37 mm. 



