The annals and magazine of natural history : zoology, botany, and geology . cific coast from Humboldt County,California, to Ensenada, Lower California. From an examination of speci-mens, this species, which Miers *says is scarcely to be distin-guished from /. ochotensis,Brandt, is seen to be specificallydistinct. It differs from /. ochot-ensis in the proportions of thebody, /. rectilineata being moreslender—about five times as longas broad—while in I. ochotensisthe length is only three and ahalf times greater than thewidth ; in the relative length ofthe antenna? to the body and theproportions
The annals and magazine of natural history : zoology, botany, and geology . cific coast from Humboldt County,California, to Ensenada, Lower California. From an examination of speci-mens, this species, which Miers *says is scarcely to be distin-guished from /. ochotensis,Brandt, is seen to be specificallydistinct. It differs from /. ochot-ensis in the proportions of thebody, /. rectilineata being moreslender—about five times as longas broad—while in I. ochotensisthe length is only three and ahalf times greater than thewidth ; in the relative length ofthe antenna? to the body and theproportions of the joints in thepeduncle of the antennte, theantcnnai in /. ochotensis reachingonly to the posterior margin ofthe third thoracic segment (in allthe specimens examined), thejoints of the peduncle beingshort and stout, while in /. recti-lineata the antennai extend to the posterior margin of thefifth thoracic segment, the joints of the peduncle being longand slender; in the form ot the anterior margin of the liead, * Journ. Linn. Soc. London, Zool. xvi. 1883, p. Idotea rectilhieata, 2. Pacific Coast of North America. 265 the excavation being deeper and wider in /. rectilineata thanin /. ochotensis; in the shape of the first thoracic segment,which in /. ochotensis is produced laterally and has the antero-lateral angles truncate, while in /. rectilineata this segment isnot produced and has rounded antero-lateral angles ; in thesize of the epimera, which are much more slender in /. recti-lineata than in /. ochotensis; and in the shape of the terminalsegment of the bodj, the posterior angle of which in /. ochot-ensis is more acute, the line from the lateral angle to themedian angle being excavate, while in /. rectilineata this lineis straight and the median angle obtuse. 41. Idotea Wosnesenskii, Brandt. Idotea Wosnesenskii, Brandt, MiddendorfTs Sibirisclie Reise, ii. 1851, Crust, p. 146 ; Stimpson, Bost. Journ. Nat. Hist. vi. 1857, p. 504 ; Speuce Bate, Lords
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1838
