48 



AMPHIPODA NORMALIA. 



pereiopoda subcqual ; sctffi few, minute, not longer than half the 

 breadth of the joint. 

 " Length four to five lines. 



" Hah. Island of Maui, Hawaiian Group." — Dana. 



24. AUorchestes littoralis. (Plate VIII. fig. 2.) B.M. 



"Allorchestes littoralis, Stimpson, Marine Invert, of Grand Manan, 

 p. 49, pi. 3. f. 36. 



Male. — Eyes round, moderately large. Superior antennae about two- 

 thirds as long as the inferior. Inferior antennae scarcely one-fourth 

 the length of the animal ; peduncle as long as the flagellum, the 

 latter spinous. Second pair of gnathopoda ha^dng the propodos 

 broad ovate ; palm slightly oblique, grooved towards the inferior 

 angle to receive the dactylos, and fringed with two rows of short 

 obtuse hairs, each being armed with a lateral cilium. 



Length about ^ths of an inch. 



The colour, according to Stimpson, varies from bright green, through 

 the various shades of olive, to brown. 



Bah. It is abundant on the shores from Massachusetts Bay to Grand 

 Manan, especially where the Fucus nodosus and F. veslculosus flourish. 

 I am indebted for a specimen of this species to its author. 



25. Allorchestes seminudus. 



AUorchestes seminuda, Stimpson, Proc. Cal. Acad. Nat. Sc. i. 90; 

 Journ. Bast. Soc. Nat. Hist. vol. vi. 



" Body somewhat compressed. Eyes oval. Superior antennae three- 

 fifths as long as the inferior ones ; inferior antennae two-fifths as 

 long as the body ; on both pairs of antennae there are a few short 

 setae at the extremity of each articulation. Propodos of first pair 

 of gnathopoda small, palm oblique, almost transvei'se ; dactylos of 

 moderate size ; carpus produced at its inferior angle into a sharj) 

 projection. Propodos of the second pair rather large, oblong 

 ovate, deeply excavated below for the reception of the point of the 

 dactylos, which is more than half as long as the hand. Colour 

 pale green ; antennae red. 



" Length ^^ths of an inch." 



Mr. Stimpson, from whom we have adopted the above description, 

 says that it is closely allied to A. Pugettensis, but is smaller and 

 more compressed, the superior antennae are more setose, and the 

 first pail' of gnathopoda are different in shape, the palm being much 

 less obUque. 



It is common at St. Francisco, living among barnacles and sea- 

 weed, on stones, and the piles of wharfs, in the littoral zone. 



