FISHERY BULLETIN; VOL. 78, NO. 3 



segment of endopod similar to leg 2; second seg- 

 ment of endopod similar to leg 2 but with only one 

 inner seta, third segment with two inner to termi- 

 nal setae and one minute outer seta, outer portion 

 of segment with scalelike spinules. Leg 4 (Figure 

 13) basipod, exopod, endopod first and second seg- 

 ments similar to leg 3 except first segment of en- 

 dopod with short but well-developed inner seta; 

 third segment of endopod with three setae (middle 

 longest). Basal segment of leg 5 (Figure 14) with 

 dorsal seta, terminal segment with minute 

 spinules on outer proximal portion and four setae 

 as indicated in the figure. Area of leg 6 obscured by 

 egg sacs and not seen (usually present on 

 bomolochids as three setae on genital segment). 



Male. — Body form as in Figure 15. Total length 

 1.14 mm, greatest width 0.44 mm (measured at 

 widest part of cephalothorax). Cephalothorax 

 more or less rounded (length 0.41 mm) with broad 

 rostrum. Genital segment longer than wide (247 x 

 177 (xm) indistinctly separate from segment bear- 

 ing leg 5. Abdomen 2-segmented: first segment 

 slightly longer than wide (65 x 59 /xm); second 

 segment (59 x 88 ^tm) with two patches of 

 scalelike spinules as in Figure 16. Caudal rami 

 (Figure 16) longer than wide (50 x 35 /um), each 

 with a single row of scalelike spinules and six 

 setae (longest seta 531 ixm). 



Maxilliped (Figure 17) 4-segmented: second 

 segment with several uneven rows of small knob- 

 like processes, one seta, and an inner row of uni- 

 form spinules, proximal half of outer edge fringed 

 with long hairs; last segment in form of claw with 

 single small, toothlike process near proximal 

 inner corner, inner edge serrate along entire 

 length. 



The single specimen examined was not dissect- 

 ed; therefore, detailed inspection of remaining 

 appendages was not possible. The following de- 

 scription is based on gross examination of the 

 specimen. First antenna 5-segmented with sev- 

 eral long graceful setae and an aesthete on each of 

 last two segments. Second antenna similar to 

 female except spinules on third segment propor- 

 tionately larger. Oral appendages similar to 

 female. Legs 1-5 similar to Pumiliopsis sardinel- 

 lae male with the following exceptions. Leg 2 en- 

 dopod third segment with at least three setae. Leg 

 3 endopod third segment of Pseudorbitacolax fim- 

 briatus damaged and examination not possible. 



Etymology. — The specific name, fimbriatus, refers 

 720 



to the specific name of the host fish iSardinella 

 fimbriata) from which this copepod was collected. 



Remarks. — The female of this species can be sepa- 

 rated from P. uarunae and P. nudus on the basis of 

 the size and shape of the rostrum; in P. fimbriatus 

 it is slightly longer than broad, and in the other 

 two species it is broader than long. The genital 

 segment of P. fimbriatus has two prominent 

 rounded processes that are lacking in P . varunae 

 and P. nudus. Also, the maxilliped hook of P. fim- 

 briatus is much more strongly curved than in 

 either of the other two species. 



Pseudorbitacolax varunae 

 (Bennet 1966) (Figures 18-29) 



Syn: Bomolochus varunae Bennet 1966:295. 



Material examined. — All copepods were collected 

 from the orbit of the host fish, Anodontostoma 

 chacunda: 8 9 from Manila, Philippine Islands; 4 9 

 from Kerala, India; 4 9 from Madras, India; 2 9 

 from Java; 8 9 from Sandakan Bay, Borneo. 



Female. — Body form as in Figure 18. Total length 

 2.01 mm, greatest width 1.07 mm (measured at 

 widest part of cephalothorax); cephalothorax 

 length 0.88 mm. Rostrum (see Figure 21) wider 

 than long ( 106 x 601 ixm.) with no dorsal or ventral 

 hooks. Genital segment (Figure 19) wider than 

 long (147 X 253 fxm). Abdomen (see Figure 19) 

 3 -segmented, segmentation incomplete between 

 second and third segments; segments measure 

 (length X width) 88 xl53/>tm,53 x 153/xm,and76 

 X 141 fxra; third segment (Figure 20) with two 

 ventral patches of scalelike spinules. Caudal rami 

 (Figure 20) longer than wide (118 x 47 jxm), each 

 ramus with ventral patch of scalelike spinules and 

 six setae; longest seta 165 yum. 



First antenna (Figure 21) 7-segmented with an 

 aesthete on each of the last two segments; plumose 

 setae similar to those of P. fimbriatus . Second an- 

 tenna (Figure 22) with 2 or 3 rows of conspicuous 

 hooked spinules on third segment, four hooked 

 spines and two setae distally. Mandible, parag- 

 nath, first maxilla, and second maxilla as in Fig- 

 ure 23; labrum with two large patches of scalelike 

 spinules. Maxilliped (Figure 24) hook only 

 slightly curved, with small, inner, toothlike pro- 

 jection. 



Legs 1-4 biramous, rami of legs 2-4 

 3-segmented. Interpodal plate of leg 1 (Figure 25) 



