120 University of California Publications. | ZooLoGY 
32. Inner rami without plumose bristles, or lacking; the entire foot 
may beabsent on one or sbobhysides. cer scale eee ioe sien ee 33 
33. Furea long and narrow, at least six times as long as broad....Temora 
33. Furca at most three times ag lone as broad. 5... <csc~ ec se eae 34 
34. Middle joint of outer ramus of third and fourth feet with two 
bristles; terminal joint with seven; fig. 12a................. 35 
34. Middle joint with one, terminal with five...................:.- 37 
35. Outer border of outer ramus of swimming feet not denticulate. . 
wo avelie aveievevapsiace'a oy dus sobeletnsal atetapoteka uae uOtsye iets cei nia tey sesso. sieht Calocalanus 
35. Outer border on rear pairs denticulate; fig. 12a.......:......... 36 
36. Fifth foot lacking in female, or knob-like; in the male only the 
left, fifth. oot: present is. /cvecte we ecsielcreisterccs een eee ets a ay Acrocalanus 
36. Fifth foot in female 2-jointed (fig. 12c); in the male the right is 
2-jointed, the left 5-jointed (fig. 12e)................ *Paracalanus 
37. Ourer ramus of first foot 3-jointed; fifth foot absent in female... 
rises chs by pane ante Ohara) NEEM tpib tata loll diets (een er eo paRePEE Ts ket ore eNO *Eucalanus 
37. Outer ramus of first foot 2-jointed; fifth foot present in female 
GH LOD oie teres acho arate tae oss, yagec esa ter se itches ke anteater *Rhincalanus 
38. Inner ramus of second foot 3-jomted.....-...-...+6.-- *“Mecynocera 
38. Inner ramus of second foot 2-jointed (fie. 280)............<6.-..- 39 
38. Inner ramus of second foot l1-jointed (fig. 25€) ................ 51 
39. Terminal joint of outer rami of second to fourth feet with five 
Pmisules = oninmer an am eu tes apiet oa laxeteelerovel sie tans erere reise net Spinocalanus 
39. Terminal joint with four bristles on inner margin (fig. 14))..... 40 
40. Surfaces of rami of second to fourth feet without very large 
spines; appendages of anterior maxillipeds have the form of 
DTISLIGS OLA OOKS i aia retsis ics, ousie Hosieves okt srekonehe ay Otis aeetniet oRcvoha: a aiets hate 41 
40. Surfaces of outer rami and of the two terminal joints of the 
inner rami of the third and fourth feet with larger spines (as 
in fig. 28b); part of the appendages of the anterior maxilliped 
vermitorm (ie. o0d) ‘or -pencillate scr. <itelests ore byes ste reniene 49 
41. Basals and outer rami in second and third feet broader than in 
the fourth pair, the second basal irregularly toothed on the 
FATES (HEE MI) oY oy oto Ue cen Cy Hs aaa FS) Pee a OI ee 8 eI ot Oyo *Clausocalanus 
41. Second and third feet not differing as above from fourth foot... 42 
42. Outer marginal thorns of terminal joint of outer ramus of third 
and fourth feet comb-like and placed in deep indentations in 
LTS pM NT Aros ck caalst oye seapoucyolanetes simte ewer ein el lela keeueta ayetaris Ctenocalanus 
423 ThesevotLethesnsval ishapereatectsiicercae oc real erates Shee a eee eee 43 
43. Fifth pair of feet symmetrical or lacking..........-..:.......%.. 44 
43. Fifth pair of feet asymmetrical or lacking .................... 47 
44, Anterior part of head with a spine in the dorsal median line.... 
PP Pas PCa EE ey IA ta OTOL pop nolo an og cmowtoct Gaetanus? 
Aa. Head =wathout: Ghis spine ge cite seacets)cierar-tol rete ene Ren Meieyetetet esta netaters 45 
Ade vith LOOT MACK IAD sper cre: ous ie orate eect! helene ote Pseudocalanus? 
45. Fifth foot 2-jointed, with a thick, curved bristle at the end..... 46 
46. Terminal bristle of fifth foot much longer than the basal joint 
een A eae Ole GIS OO Oo CO CIOE Drepanopus? 
46. Terminal bristles not as long as, or but little longer, than basal 
fori Ure IES Roe el atsrars ASiaraccNiS to DoS S.crolo ore Stephus? 
