NO. 3572 INDIAN OCEAN COPEPODS — CRESSET 11 



with sclerotized process on inner border. Terminal segment with 

 clawlike spine at tip. Mandible and first maxilla (fig. 25) as in other 

 members of genus. Mandible with 5 terminal teeth. Second maxilla 

 (fig. 26) mth terminal claw, segment bearing claw \\dth patch of 

 prominent spinules. Maxilliped (fig. 27) chelate, tip of movable 

 process bearing broad scalelike spine opposed by process on preceding 

 segment. 



Legs 1^ biramose, covered with stout spinules. Spine and setal 

 formula as follows: 



Leg 1 (fig. 28) with 1 long and 1 short seta at tip. Outer edges of 

 segments on exopod and endopod with rows of pointed spines as in 

 figiu'e. Leg 2 (fig. 29) exopod elongate as in figure, terminal exopod 

 segment bearing 2 short inner spines. Second exopod segment re- 

 duced. First exopod segment with prominent lobe on inner distal 

 corner. Endopod without spines and setae except for very small 

 spine at tip. Leg 3 (fig. 30) exopod with well-developed spines on 

 outer corners of segments. Endopod unarmed except for terminal 

 seta. Leg 4 same as leg 3. Leg 5 (see fig. 21) broad lobe with 3 distal 

 setae and 1 basal seta. Lobe covered Avith spinules. Leg 6 (see 

 fig. 21) reduced to single short spme on genital segment at area of egg 

 string attachment. 



Egg strings uniseriate. 



Male.^ — ^Unknown. 



Remarks.- — This species can be distinguished from all other mem- 

 bers of the genus by the prominent lobe on the inner distal corner of 

 the first exopod segment of leg 2. It is further characterized by the 

 conspicuous spinules on the rami of legs 1-5. 



Habitat: Gill filaments. 



The name pusilla, from Latin, meaning "small," refers to the size of 

 the species. 



Eudactylina pollex, new species 



Figures 4, 31-42 



Collection: 23 females from 1 specimen of Sphyrna mokarran at 

 station 409. Holotype female USNM 113297. Paratypes (21 

 females) USNM 113298. One specimen dissected for study. 



Female. — Body form as in figure 4. Dorsal siu-face of body 

 smooth. Total length 3.6 mm. Greatest width 0.8 mm. Cephalon 

 slightly longer than wide (0.72 by 0.66 mm). First pedigerous 

 thoracic segment fused with head. Thoracic segments 3-5 free, 



