IIAVNKS; I'AMiAl.lDAK. HII'I'Ol.Vl'IDAK. ANDCKANCONIDAK LAk\ AK 



No supraorbital spine; 4 denticles on anteroventral 

 martjin of carapace; pereopods absent; abdomen 

 witliout spines or denticles. Lenj^th: 3.0 mm. 

 Range: West Greenland to Nova Scotia; Bering and 

 Okhotsk Seas; depth. 150-540 m (Holthuis 1947). 



Eualus pusio/ijs (Kr0yer) 



Larvae described from Atlantic specimens. 



Seven or eight larval stages. 



Stage I, known parentage; Stages I-VII, from 



plankton; figure 3 in Pike and Williamson (1961). 

 Last zoeal stage, from plankton, described as 



"Spirontocaris C" by Frost (1936); figure 5 in 



Frost (1936). 

 Stage L known parentage; described as "Spironto- 



cay-is pusiola" by Bull (1938); figure 1 in Bull 



(1938). 

 Stage I, known parentage; figures 27-30 in 



Williamson (1957a); figures from Bull (1938). 



It! all described stages, 3 denticles on anteroven- 

 tral margin of carapace; no spines, denticles, or dor- 

 sal setae on abdominal somites. Rostrum minute in 

 Stage L only slightly larger in other stages, without 

 teeth in all stages. Exopodites of maxillipeds 1-3, 

 with 5,8, and 8 natator\' setae, respectively, in Stage 

 II. In Stages V-VIII, pereopods 1-4 with setae. 

 Length: Stages I-VIII, 2.2-4.8 mm. Range: Sea of 

 Japan to Chukchi Sea and British Columbia; Gulf of 

 St. Lawrence to Cape Cod, MA; Europe from the 

 southwestern Barents Sea to Spain; depth, intertidal 

 to 1.381 m (Butler 1980). 



Eualus suckleyi (Stimpson) 



Only Stages I and II described, known parentage; 

 figTjres 3 and 4 in Haynes (1981). 



In Stage I, anteroventral margin of carapace with 

 3 or 4 denticles; undeveloped exopodites on pereo- 

 pods 1-3. In Stage II, carapace with supraorbital 

 spine, without denticles along anteroventral margin. 

 In Stage II, maxillipeds 1-3 with 4, 5, and 5 natatory 

 setae, respectively; pereopods 1-5 present but 

 undeveloped. Length: Stage I, 3.0-3.5 mm; Stage 

 II, 3.5-4.2 mm. Range: Okhotsk Sea to Chukchi Sea 

 to about Grays Harbor, WA; depth, 11-1,025 m 

 (Butler 1980)." 



Genus Heptacarpus Holmes 



Only Stage I described. Rostrum minute to absent; 

 no supraorbital spine; pereopods absent or pairs 1 -5 



present but undeveloped; abdominal somites without 

 posterolateral spines; exopodites develop on pereo- 

 pods 1 and 2; tip of antennal scale not always jointed. 



Heptacarpus brevirostris (Dana) 



Stage I, known parentage; described as Spironto- 

 caris brevirostris by Needier (1934). No figures. 



Carapace without anteroventral spines; antennal 

 scale partially jointed at tip. Length: Stage I, 1.5 

 mm. Range: Aleutian Islands, AK, to San Fran- 

 cisco Bay, CA; depth, intertidal to 128 m (Butler 

 1980). 



Heptacarpus camtschaticus (Stimpson) 



Stage I, known parentage; figure 8 in Haynes 

 (1981). 



Carapace without spines; minute rostrum curves 

 slightly downward following dorsal contour of eyes; 

 undeveloped exopodites on pereopods 1 and 2; abdo- 

 men without spines or spinules. Length: Stage I. 

 2.9 mm. Range: Sea of Japan to Chukchi Sea and 

 Strait of Georgia, WA; depth, intertidal to 108 m 

 (Butler 1980). 



Heptacarpus paludicola (Holmes) 



Stage I, known parentage; described as Spironto- 

 caris paludicola by Needier (1934); figure 1 in 

 Needier (1934). 



Antennal scale partially jointed at tip; abdomen 

 without posterolateral spines. Length: Stage I, 2.0 

 mm. Range: Tava Island, AK, to San Diego, CA; 

 depth, intertidal to 10 m (Butler 1980). 



Heptacarpus tridens (Rathbun) 



Stage I, known parentage; described as Spironto- 

 caris tridens by Needier (1934); figure 1 in 

 Needier (1934). 



Carapace without anteroventral spines; antennal 

 scale unsegmented. Length: Stage I, 3.0 mm. 

 Range: Aleutian Islands, AK, to Cape Flatter^', WA; 

 depth, intertidal to 110 m (Butler 1980). 



Genus Hippo lyte Leach 



Only Stage I described. Antennal scale without 

 joints at tip. 



277 



