FISHERY BULLETIN: VOL. 76, NO. 4 



with sharply pointed spine ventrally, armed along 

 either side with distinct acute spinules; this spine 

 falling short of distal tip of endopodite; scattered 

 setae basally on protopodite. 



Mandibles: (Figure 3C). Asymmetrical den- 

 tate and spined processes, as shown. 



Maxillule: (Figure 3D). Endopodite seg- 

 mented, 3 terminal, 1 subterminal seta. Basal en- 

 dite with 2 large, widely separated strong spines, 

 plus 3 setae; coxal endite with 4 spines, 3 strong 

 setae. 



Maxilla: (Figure 3El. Endopodite setae, pro- 

 gressing subterminally, 3-4. 3. plus 3 laterally, 

 and additional fine hairs as illustrated. Basal en- 

 dite proximal and distal lobes each with 3 regular 

 and 1 spinelike seta; coxal endite proximal and 

 distal lobes with 8, and 4 spinelike setae, respec- 

 tively. Scaphognathite with 4 lateral, 1 stout 

 elongate apical seta. 



Maxilliped 1: (Figure 3F). Coxopodite with 2 

 setae. Basipodite setae formula progressing dis- 

 tally 2, 3, 3, 3. Endopodite five-segmented, setae 

 progressing distally 3, 2, 1, 2, 4 +1 (Roman nu- 

 meral denotes dorsal setae); all endopodal and 

 basipodal setae heavy, spikelike. Exopodite two- 

 segmented, 4 natatory setae. 



Maxilliped 2: (Figure 3G). Coxopodite naked. 

 Basipodite setae 1, 2, progressing distally. En- 

 dopodite four-segmented, setal formula 2, 2,2,4-1- 

 I; all spikelike. Exopodite two-segmented, 4 

 natatory setae. 



Maxilliped 3: (Figure 3H). A small, unseg- 

 mented amorphous bud. 



Pereiopods: Appear as small and undifferen- 

 tiated buds, gradually enlarging as stage progres- 

 ses. 



Abdomen: (Figure 2A, a). Five somites; last 2 

 with large lateral spines; somites 2-5 each with 

 paired setae dorsally, plus a series of small distinct 

 spinules along posterior margin of somite; somite 

 6 fused to telson. Pleopods absent. 



Telson: (Figure 31). Setal formula on margin 7 

 + 7; all plumose setae (= processes 3-7) with 

 small, hooklike spinules progressing down their 



790 



length; other setae and hairs as illustrated. Anal 

 spine absent. 



Color: Zoea transparent; frontal region of 

 carapace diffused with orange, brighter orange 

 dorsally on midgut region. Chromatophores as fol- 

 lows: orange on protopodite of antennule, faintly 

 orange on scaphocerite of antenna; red-orange 

 around inner oral region; mandibles and labrum 

 outlined in red, interiorly orange; basipodites of 

 maxillipeds 1 and 2 red-orange along dorsal and 

 ventral margins; red spiderlike chromatophores 

 dorsally in longitudinal line on abdominal somites 

 3-5; orange chromatophores ventrally placed in a 

 similar manner. Eyes black, with bluish high- 

 lights in reflected light. 



Second Zoea 



Carapace length: 1.2 mm. 

 Number of specimens examined: 8. 



Carapace: (Figure 2B, b). More inflated; ros- 

 tral spine more or less knifelike in lateral view, 

 noticeably expanded proximally in dorsal view; 

 about 0.5 X CL, overreaching distal tip of antennal 

 scaphocerite spine in several specimens, unarmed; 

 posterolateral margins of carapace with about 14 

 small denticles or spinules, dorsomedial margin 

 possessing only scattered nubs or with denticles 

 totally absent; posterior spines remain slightly 

 more than 0.1 x CL; eyes now stalked. 



Antennule: (Figure 4A). Incipient segmenta- 

 tion seen at junction of exopodite with protopodite; 

 former usually carrying 4 aesthetascs and setae, 

 with 4 small thick setules on junction with pro- 

 topodite. Endopodite retains single long plumose 

 seta. 



Antenna: (Figure 4B). Endopodite thickened, 

 drawn into point distally, appearing conical, about 

 0.3 X scaphocerite length, incompletely fused to 

 protopodite, now lacking elongate plumose seta 

 seen in first stage. Scaphocerite usually with 10 

 marginal setae, plus numerous small spinules 

 ventrally along outer margin; distal spine about 



Figure 4. — Galathea rostrata, second zoeal appendages: (A) 

 Antennule; (B) antenna; (C) mandibles; (D) maxillule; (E) 

 maxilla; (F) maxilliped 1; (G) maxilliped 2; (H) maxilliped 3; (I) 

 telson. Scale lines total 0.3 mm. 



