NO. 1758. O.V MARINE COPEPODA IND CLADOCERA.—SHARPE. 429 



A 26. Body slender and not flattened. Firs! antenna eight-segmented. Inner 



ramus second Leg modified in male. Outer ramus third leg large and minis!, 



spiny and prehensile. One egg sac. Littoral to 100 fathoms. .Harpacticus. 



Body slender, oblong, and much flattened, lateral plates produced. Firsl 



antenna five-segmented. 20 to 30 tat hems Zaus goodsiri. 



A 27. Basal segmenl of inner ramus very long, several times as long as the lasl two 

 ments taken together. < me egg sac. Littoral, tidal peels among algae. 



Parawestwoodia. 



Basal segmenl of inner ramus very short, but a small proportion of the inner 



ramus. Twoeggsacs. Fifthfootof male of two separate lobes. Fresh-water 



pools as with Diapfomus and ( 'anthocamptus Onychocamptus. 



A 28. Fifth legs three-segmented . Firsl legsnol prehensile, hut asCyclops. Firsl an- 

 tenna sixteen-segmented, that of male somewhal less. One egg sac. 20 to 50 



tat hems, sandy bottom Ylisophria. 



Fifth legs less than three-segmented \ L'!». 



A 29. Fifth legs of a small setiferous lamella \ 30. 



Fifth legs from one-to t wo-segmented \ 33. 



A 30. First feet slightly prehensile. Firsl pedigerous segmenl separated from the 

 cephalothorax. Genital segmenl with a dorsal suture. Two egg sacs. 10 



fathoms, sandy bottom, algae < 'anuella. 



First fool nol at all prehensile. No transverse dorsal suture of genital segment 

 of female. First pedigerous segmenl qo1 separated from cephalothorax. .A 31. 

 A 31. First antenna eight-segmented. Body like Cyclops. Inner ramus of second 

 leu modified, two-segmented. :! to 30 fathoms, mostly muddy bottom. 



Stenht lia (male, pari ). 



First antenna, six- to seven-segmented A 32. 



A 32. Outer ramus of second antenna six-segmented. Body slender, not compressed. 

 But trace of a seta on middle segment of inner ramus of fourth legs. Inner 

 rami of second legs modified in male. Two egg sacs. A few fathoms, sandy 



bottoms (shells of hermit, crabs) Sunaristes. 



Outer ramus of second antenna three-segmented, hut well developed. Anterior 

 part of bodj somewhat depressed and broadened. A well developed seta on 

 middle segment of inner ramus of fourth legs. ( >ne egg sac. Males unknown. 



L0 to 30 fathoms, sandy bottom Bradya (in part). 



A 33. Fifth legs one-segmented A 34. 



Fifth legs two-segmented I 37. 



- 



\ :;i Fifth foot, an oval setiferous segment in belli sexes, about as broad as long. 

 One egg sac. Inner ramus of second leg modified in male Brackish marsh 



pools and bays Tachidius. 



Fifth fool Ion; er than bread \ 35. 



A 35. Body like Cyclops. Genital segmenl much broader than the preceding one. 

 Antennae much as Cyclops. Two egg sacs. Surface nel and washings A 36. 

 Body Canthocamptus-M^e, genital segment doI distinctly broader than the pre- 

 ceding segment. Antenna' much as C 'anthocamptus. Two egg sacs. :! to 

 Mi) fathom-, mostly mud bottom, occasionally algae .Stenhelia (male, parti) I. 

 A 36. Anterior half of bod) almost circular. Second segment of fust antenna much 



t he longest. Washings from sponges, etc. (Indian Ocean) Hermanella . 



Anterior half of body ahout one half as wide as long. Sec I segmenl of first 



antenna not the longest . Surface net and washings | Indian < >ceari i. 



Hersiliodes. 



A 37. Fifth foot with terminal segment trilobate, each lobe with a spine, and inner 



expansion of basal segment always with two spines, as in text fig. 7. 



Body slender, fusiform. Readily Heat on surface film. Oneeggsac. H> to 



30 fathoms, muddy bottom Ectinosoma. 



Fifth foot not trilobate, and inner expansion of basal segment not with two 

 spines A 38. 



