FISHERY BULLKTIN: VOL. 8.S. NO. :>. 



Hippo lyte clark't Chace 



Stage I, known parentage; described as Hippolyte 

 califomiensis by Needier (1934); figure 1 in 

 Needier (1934). 



Rostrum long; carapace with 4 anteroventral den- 

 ticles; bud of pereopod 1 present; small postero- 

 lateral spines on abdominal somite 5. Length: 1.9 

 mm. Range: Sheep Bay, AK. to Puget Sound, WA; 

 Santa Catalina Island, CA; depth, intertidal to 30.5 

 m (Butler 1980). 



Cape Cod, MA; Bering and Okhotsk Seas; Aleutian 

 Islands, AK; depth, 0-930 m (Holthuis 1947). 



Genus Spirontocaris Bate 



In all described stages, rostrum absent to long; 

 posterolateral spines on abdominal somites 4 and 5, 

 or 5 only; no minute spines on posterior margins of 

 abdominal somites. In Stage I, supraorbital spine 

 present or absent; all pereopods present luit undevel- 

 oped. Exopodites only on pereopods 1 and 2 in later 

 stages (usually by Stage IV or V). 



Genus Lebbeus White 



In all described stages, posterolateral spines on 

 abdominal somites 4 and 5 (Fig. 2). In Stage I, larvae 

 relatively long (> 5.0 mm); rostrum long, slightly 

 sinuate (Fig. 2), with no supraorbital spine. Abbre- 

 viated development. 



Lebbeus groenlandicus (Fabricius) 



Three larval stages. 



Stages I-III from both known parentage and plank- 

 ton; figures 1-3 in Haynes (1978b). 



Stage I. known parentage; figure 5 in Ivanov 

 (1971). 



Not "SpironfocarisAarva. No. lA." as described by 

 Stephensen (1935) (see Haynes 1978b). 



Somewhat more developed in each stage than lar- 

 vae of L. polaris. In Stage II, no vestigial exopodites 

 f)n pereopods. Telson with about 20 setae in Stages I 

 and II, and 3 -(- 3 spines in Stage III (megalopa). 

 Length: 6.4-7.6 mm. Range: Sea of Japan to 

 Chukchi Sea to Puget Sound, WA; arctic coast of 

 Canada; Greenland to Cape Cod, MA; depth, 11-518 

 m (Butler 1980). 



Lebbeus polaris (Sabine) 



Probably 4 larval stages. 



Stages I and II, known parentage; figures 1 and 2 



in Haynes (1981). 

 Neither Spirontocaris polaris (= L. polaris) as 



described by Stephensen (1916) nor "Spironto- 



mnls-larva No. 1" as described by Stephensen 



(1935) (see Haynes 1981). 



In Stages I and II, telson with 9 -i- 9 setae. In 

 Stage II, vestigial exopodite on peropod 1. Length: 

 Stage I, 5.2 mm; Stage II, 5.8 mm. Range: circum- 

 polar, southward to the Skagerrak and Hebrides; 



Spirontocaris arcuata Rathbun 



Only Stage I described, known parentage; figiuv 6 

 in Haynes (1981). 



Rostrum short (about 1/7 carapace length), pro- 

 jects downward following contour of eyes; 2 or 3 

 minute denticles on anteroventral margin of cara- 

 pace; supraorbital spine absent; posterolateral spines 

 on abdominal somites 4 and 5. Length: 4.1-4.4 mm. 

 Range: Sea of Japan to Chukchi Sea to Juan de Fuca 

 Strait, WA; Canadian Arctic; depth, 5-641 m (Butler 

 1980). 



Spirontocaris lilljehoriiii (Danielssen) 



Larvae described from Atlantic Ocean. 



Six larval stages. 



Stages I and II, known parentage; Stages I-\'. 

 from plankton; Stages VI (megaloi:)a) and \1I 

 (first juvenile), reared in laboratory from Stage 

 V; figure 1 in Pike and Williamson (1961). 



Stage I. known parentage; described as>). sjii)ii(s 

 var. lilljehorgi by Lebour (1937); figure 1 in 

 Lebour (1937). 



Stage I; figures 14-16 iti Williamson (1957a). De- 

 scription and figures from Lebour (1937). 



In all described stages, posteroanterior margins of 

 carapace smooth; abdominal somite 4 with a dorsal 

 tuft of short setae, without posterolateral spines. 

 Rostrum long (about 3/4 length of antennular pedun- 

 cle), deepens slightly in later stages but does not 

 develop teeth until megalopa. Supraorbital spine 

 rudimentary in Stiige I, clearly defined in later 

 stages. F\)sterolateral spines on abdominal somite 5 

 becoming smaller in later stages and may be absent 

 in Stages V and VI. Megalopa and first juvenile 

 stage without dorsal tooth on posterior margin of 

 abdominal somite 3. Length: Stages I-VI, 4.8-8.5 

 mm. Range: From Spitsbergen and southwestern 



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