LARVAE OF DECAPOD CRUSTACEA 427 



Fore-body much wider than long, and much wider than hind-body. Hind-body 

 not concave behind. Abdomen, in later stages, very broad at base, and forming 

 a direct continuation of the hind-body. 



Antenna at first very much shorter than antennule, later becoming broad at base, 

 and with large outer pointed process ; flagellum short and broad. 



Maxillule without palp. Exopod of maxilla with setae in stage i, but without 

 setae in late stages. Maxillipede 2 without exopod, or with exopod rudimentary. 

 Maxillipede 3 without exopod. Leg 2 dactylus not greatly elongated. Leg 5 without 

 exopod. Legs with coxal spines. 



Pleopods in last stage very narrow, without appendix interna. Telson with large 

 spine on either side. 



I have not found it possible to make any specific distinctions in the small material 

 available, though in some cases the size of corresponding stages is so different that more 

 than one species is certainly present. Specimens from the eastern Atlantic agree in all 

 respects with Stephensen's description of S. arctiis, and may well belong to that species, 

 though, so far as I know, the adult has not been recorded farther south than Senegal. 



The only point of interest that arises from this material is the strong evidence that, 

 within the genus Scyllanis, specific differences in the larvae are very small or non- 

 existent. 



The accompanying figures will show the close agreement between East African species 

 of very small form (Fig. 33) and S. arctiis as figured by Stephensen. Fig. 32 shows what 

 is probably S. arctus in stage VIL 



Table X. List of stations at which Phyllosomas of Scyllarus were taken 



Genus Scyllarides, Gill (Figs. 35-37) 

 The first Phyllosoma of Scyllarides lattis, taken from among the pleopods of the parent, 

 has been described by Santucci (1928). Later larvae have been referred to the genus by 



7-2 



