CONOR and CONOR: LARVAE OF FOUR PORCELLANIDAE 



once, and specific variations will be indicated 

 in the text. Prezoeae were not dissected. 



ZOEA I 



(Figure 3) 



Antennule unsegmented with five or six ter- 

 minal processes including three aesthetascs and 

 two or three setae. 



Antenna biramous; endopodite fused with 

 protopodite and bearing a terminal point and 

 subterminal tubercle with a fine seta between; 

 exopodite mobile, about li/> times as long as 

 endopodite, with three or four prominent distal 

 spines and one long seta proximal to the spines. 



Mandibles strongly sclerotized, heavily- 

 toothed, asymmetrical appendages. 



Maxilla I with unsegmented endopodite bear- 

 ing three or four terminal setae and a number 

 of fine hairs along the anterior margin; basal 

 endite with 9 or 10 stout spinous processes; 

 coxal endite with 9 or 10 stout setae. 



Maxilla II with unsegmented endopodite bear- 

 ing eight or nine setae, grouped 3, 1-2, 3-4 prox- 

 imal to distal, 3-2-4 being the most common 

 grouping. Basal endite bilobed: distal lobe with 

 7 to 10 setae; proximal lobe with seven to nine 

 setae. Coxal endite bilobed: distal lobe with 

 four to six setae; proximal lobe with 8 to 11 

 setae. Scaphognathite with six or seven long 

 plumose marginal setae, and one apical seta; 

 numerous fine hairs occur on scaphognathite 

 margin between plumose setae and elsewhere 

 on appendage as figured. 



Maxilliped I biramous. Coxopodite with one 

 or two distal setae. Basipodite with 9 to 11 

 setae most commonly grouped 2, 2, 3, 3 proximal 

 to distal. Endopodite four-segmented: segment 

 1 with one to three distal setae, inner margin; 

 segment 2 with two or three distal setae, inner 

 margin ; segment 3 with four to seven setae in- 

 cluding two or three medial, one or two distal, 

 inner margin, occasionally one long medial seta, 

 outer margin; segment 4 with five to seven ter- 

 minal setae and one proximal on outer margin. 

 Exopodite two-segmented with four terminal 

 natatory setae on distal segment. Additional 

 groups of very fine hairs appear on endopodite 

 segments 2, 3, and 4 and on segment 2 of exop- 

 odite as figured. 



Maxilliped II biramous. Coxopodite lacking 

 setae. Basipodite with three setae on inner 

 margin grouped 1, 2 proximal to distal. Endop- 

 odite four-segmented: segment 1 with one or 

 two distal setae, inner margin; segment 2 with 

 one or two distal setae, inner margin; segment 

 3 with one medial and one or two distal setae, 

 inner margin; segment 4 with three to five (usu- 

 ally five) terminal setae and one proximal seta, 

 outer margin. Exopodite two-segmented with 

 four terminal natatory setae on distal segment. 

 Groups of very fine hairs appear on endopodite 

 segments 2, 3, and 4 and on both segments of 

 exopodite as figured. 



Maxilliped III present as small bilobed bud 

 which undergoes growth throughout stage. 



Pereiopods present as five pairs of short limb 

 buds, all without setae; none chelate; undergo 

 growth during entire stage. 



Abdominal somites numbering five; segments 

 3, 4, and 5 with serrated dorsal posterior mar- 

 gins; segments 4 and 5 each with a pair of 

 strong ventrolateral spines on posterior margin. 



Telson with seven symmetrically arranged 

 pairs of processes, with central pair located on 

 central prominence ; outer margin to center line: 

 one heavy, articulated lateral process with few 

 spinules (not figured), one short fine seta, and 

 five long plumose articulating setae; all long 

 plumose setae armed distally with fixed curved 

 spines (Figure ID); fine hairs (not figured) on 

 margin of telson between all major plumose setae 

 and on central prominence; anal spine present. 



Chromatophores as described in the prezoea; 

 carapace 1.23 to 1.39 mm in length. 



ZOEA II 



(Figure 4) 



Antennule biramous; exopodite with six or 

 seven terminal processes including four aesthet- 

 ascs and two or three setae, followed by five 

 tiers of subterminal aesthetascs grouped 2, 3, 

 3, 4, 3 progressing proximally; three or four fine 

 setae present on distal margin of protopodite. 



Antenna biramous; endopodite same form as 

 in zoea I; exopodite similar to zoea I, with three 

 spines and one seta distally; exopodite and en- 

 dopodite approximately equal in length. 



195 



