MARINE INVERTEBKATA OF GRAND MANAN. 55 



Arnfipoder, t. i. f. 3; Tidsskr., ii. 257. The specimens obtained differ from the 

 figures and descriptions of the above species, in possessing the same appendicula 

 to the flagella which are seen in Ananyx appendiculosus and nobilis. This is per- 

 haps a sexual character; if so, the specimens figured by Kroyer, in his Gronland's 

 Amfipoder, are females. The hands, also, are there represented smaller than is 

 the case with our specimens. 



G. MACROPTHALMUS, St., n. s. Very closely allied to the preceding species in color 

 and general appearance. The back, however, is carinated only al the abdomen, 

 which readily distinguishes it. The appendicular branches of the superior antennae 

 are minute, and scarcely perceptible. Eyes very large, subreniform, near each 

 other. Epimera small. Caudal stylets of the first pair as long as those of the 

 second; both with their outer rami shorter and narrower than the inner ones; last 

 pair with broad, lancet-shaped rami, shorter than in G. Sabinii. Color sometimes 

 bright crimson, but usually mottled red and flake- white; very variable. Length, 

 0.5 inch; of the inferior antennae, which are longest, 0.2. Dredged on rocky bot- 

 toms in the laminarian zone, and occasionally taken at low-water mark. 



G. PULEX. Cancer pulex, Lin. Oniscus pulex, Mull. ; 0. Fabr., F. G., 254. Gam- 

 marus locusta, Mont., Lin., Trans., ix., pi. iv. f. 1; Kroyer, Gronl. Amf., 27; Tidsskr. 

 ii. 258; Gould. Inv. Mass., 334. This species is very abundant under stones in all 

 parts of the littoral zone. It is usually of a dark-green color, but often lighter, 

 never, however, variegated. The length of some specimens is more than an inch. 

 Notwithstanding its abundance on the shores, only one specimen occurred below 

 low-water mark, which probably got there accidentally; showing that the littoral 

 zone is its proper habitat. 



G. PURPURATUS, St., n. s. Large, compressed, but rounded on the back, with 

 slight spinous prominences on the posterior abdominal segments, as in G. pulex. 

 Eyes small, black, oval. Superior antennae slender, two-thirds as long as the body, 

 with very slender accessory flagella; inferior ones five-sevenths as long as the supe- 

 riors. Hands of the second pair much the largest ; femora of the posterior pairs of 

 legs very large, and suboblong. Caudal stylets of the posterior pair with the internal 

 rami minute, and the external ones long, thick, and sword-shaped, equalling in length 

 one-fifth that of the body. The color never varies, being a uniform dark purple in 

 all the specimens which have come under my notice. Length one and one-tenth 

 inch. Taken on a sandy bottom, in twelve fathoms, off Cheney's Head. It also 

 occurs in deep water in Massachusetts Bay. Except in color, this species has almost 

 precisely the external appearance of G. pulex; but the remarkable character of the 

 posterior pair of caudal stylets at once distinguishes it. They are also entirely dif- 

 ferent in station. 



PTILOCHEIRUS, St., n. g. 



Body broad, as in the Corophidce; epimera large and strong, much higher than 

 broad. Mandibles with greatly elongated palpi; maxillipeds with their internal 

 lamellae of half their own length. Superior antennas appendiculate, inferior ones 



