CONOR and CONOR: LARVAE OF FOUR PORCELLANIDAE 



Maxilla I with unsegmented endopodite bear- 

 ing four to seven terminal and subterminal setae 

 and a group of fine hairs along anterior margin; 

 basal endite with 10 or 11 setae; coxal endite 

 with 9 to 11 setae. 



Maxilla II with unsegmented endopodite bear- 

 ing nine setae grouped 3, 2, 4 progressing dis- 

 tally. Basal endite bilobed: distal lobe with 12 

 or 13 setae; proximal lobe with 11 or 12 setae. 

 Coxal endite bilobed: distal lobe with five to 

 seven setae; proximal lobe with 12 to 15 setae. 

 Scaphognathite with 13 to 16 marginal, 3 apical, 

 and 1 or 2 internal lateral setae (total 17 to 21) ; 

 fine hairs present on scaphognathite margin be- 

 tween plumose setae and elsewhere on append- 

 age as figured. 



Maxilliped I biramous, Coxopodite with two 

 distal setae. Basipodite with setae usually- 

 grouped 2, 2, 3, 3 proximal to distal along inner 

 margin. Endopodite four-segmented: segment 

 1 with two or three distal setae, inner margin; 

 segment 2 with three or four distal setae, inner 

 margin and one distal seta, outer margin; seg- 

 ment 3 usually with two medial and three distal 

 setae, inner margin and one medial, outer mar- 

 gin; segment 4 with four to seven terminal and 

 one proximal seta, outer margin. Exopodite two- 

 segmented, the distal segment bearing 14 nata- 

 tory setae. 



Maxilliped II biramous. Coxopodite lacking 

 setae. Basipodite with three distal setae 

 grouped 1, 2 proximal to distal. Endopodite 

 four-segmented: segment 1 with two (occasion- 

 ally one) distal setae, inner margin; segment 2 

 with two distal setae, inner margin and one dis- 

 tal setae, outer margin; segment 3 with one 

 medial, two or rarely three distal, inner margin, 

 and one medial seta, outer margin; segment 4 

 with five terminal setae and one proximal seta, 

 outer margin. Exopodite with two segments, 

 the distal segment bearing 14 natatory setae. 



Maxilliped III biramous. Exopodite indis- 

 tinctly divided with two segments; zero to three 

 setae have been observed on endopodite. Endop- 

 odite with up to five segments apparent beneath 

 cuticle, depending on the age of the zoea. 



Pereiopod buds five pairs in number with first 



and fifth pairs distinctly chelate; buds increase 

 in length throughout the stage. 



Abdominal somites numbering five, similar to 

 form in zoea I but larger and with paired ple- 

 opod buds of unequal length on segments 2 

 through 5; pleopods increase in length through- 

 out the stage. 



Telson similar to form in zoea I but larger 

 and with one unpaired median seta on the cen- 

 tral prominence (Figures IE and 8J). 



Pattern of primary chromatophores same as 

 that in zoea I but new ones may be added on the 

 growing pereiopods. Carapace 1.80 to 1.89 mm 

 in length. Rostrum bears distinct ventral bulge 

 just anterior to eyes. 



MEGALOPA 



(Figures 6 and 9) 



Antennule biramous with three-segmented 

 peduncle. Dorsal antennular ramus six-seg- 

 mented; segments 2, 3, 4, and 5 with 2, 2, 2, 1 

 tiers of aesthetascs respectively; tiers, progres- 

 sing distally, contain approximately 6-7, 6-7, 6-7, 

 3-4, 3, 2, 3 aesthetascs respectively; one long 

 slender seta associated with the distal tier on 

 each of segments 3 and 4. Ventral ramus with 

 three segments ; setation as figured. 



Antenna long and slender with three-seg- 

 mented peduncle; flagellum with 28 to 30 seg- 

 ments; most segments armed distally with var- 

 iable numbers of short bristles and hairs as 

 figured. 



Mandible differs from toothed form in zoeal 

 stages and is partially cup-shaped with slightly 

 irregular bladelike leading edge; three-segment- 

 ed palp has seven to ten spines on distal segment. 



Maxilla I with indistinctly two-segmented en- 

 dopodite bearing a single terminal seta on the 

 distal segment and a single seta situated at base; 

 basal endite with a total of about 25 stout spines 

 and setae; coxal endite with a total of 32 stout 

 setae. In addition, there is a single long seta 

 proximally on the exopodite and a delicate exite 

 edged with fine hairs associated with coxal por- 

 tion of appendage. 



Maxilla II with slender, indistinctly segmented 

 endopodite bearing three terminal setae and one 



205 



