LARVAE OF SERGESTES 



63 



reaching nearly to hepatic spine. Dorsal organ very small. Dorsal spines of abdomen 

 decreasing from in front backwards. Lateral spine of somite i very much longer than 

 the rest, turned forwards. Lateral spines of somites 2-5 small, simple, 2-4 with small 

 basal accessory spine. Somites 1-5 with median ventral spines. Telson short, parallel- 

 sided, with small lateral spines and small simple apical fork, the arms of which are nearly 

 parallel. 



Fig. 56. S. edzvardsi. a, Elaphocaris 2; b, eye; c, Acanthosoma 2; d-f, Acanthosoma i, 

 antennal scale, end of antennal endopod and telson. 



Eye large, asymmetrical, about one-fifth length of body, without papilla. Greatest 

 diameter of eyeball more than half length of eye. In preserved specimens the pigment 

 is pale, with a darker area at one end. Antennal scale short, with two small spines on 

 outer margin near end, and three stout apical setae; flagellum very long (2-48 mm.) 

 with a pair of small spines near base and one on antepenultimate segment. Mandible 

 without palp. Exopod of uropod about seven times as long as wide, the setose part 

 three times as long as the bare part. 



Acanthosoma 2 (Fig. 56 c). Length 27 mm. Rostrum 075 mm. 

 Mandible without palp. Maxillipede 3 much larger than legs. Pleopods small, 

 without endopods. 



