FISHERY BULLETIN: VOL. 80, NO. 2 



Left 



Right 



0.25 mm 



0.25 mm 



Figure 1.— Stage I zoea of Lithodes aequispina: A, whole animal, right side; B.antennule, dorsal; C, antenna, ventral; D, mandibles 

 (left and right); E, maxillule, ventral; F, maxilla, dorsal; G, first maxilliped, lateral; H, third maxilliped, lateral; I. pereopods 1-5, 



Peduncle with simple seta terminally. Larger 

 projection with two aesthetascs subterminally, 

 four aesthetascs and two simple setae terminally. 

 Smaller projection with aesthetasc and simple 

 seta terminally. 



Antenna (Fig. 1C).— Second antenna (antenna) 

 with inner flagellum (endopodrte) and outer 

 antennal scale (exopodite). Naked flagellum un- 

 segmented, slightly shorter than scale (scale 

 length includes spine). Antennal scale unjointed 



306 



distally, fringed with 10 heavily plumose setae 

 along terminal and inner margins; prominent 

 spine distally on outer margin. Ventral surface 

 of protopodite with spinulose spine at base of 

 flagellum, naked spine at base of scale. Shape 

 and spination of protopodite same as in later 

 zoeal stages except fewer spinules on spinulose 

 spine. 



Mandibles (Fig. ID).— With unsegmented palps 

 in all larval stages. Incisor process of left man- 



