MARINE INVERTEBRATA OF GRAND MANAN. 45 



the appendages, covered everywhere on the back and sides with sharp broad-based 

 spines, some ot" wliit'h are ver^' long. These st)nietimes show a tendency to arrange- 

 ment in transverse rows. There is one very strong spine just above each branchial 

 hiniina. The head is hvrge, with prominent eyes ; the inferior antenna) very much 

 more slender than the superior ones, and the mouth parts well developed, the tri- 

 articulate palpi of the mandibles being small but obvious. The arms are placed at 

 the thickening near the anterior extremity of the second segment, and have two 

 spines on the first article in each, also two spines on the hand, one at its extremity 

 and the other on the inner edge, just reached by the long curved finger when closed. 

 The posterior thoracic legs are highly developed with their subcheliform hands pro- 

 vided with a spine in the middle. Abdomen very short, with a pair of posterior 

 appendages which nearly equal it in length. The ground color is either purplish 

 or brownish, upon which are numerous spots and patches of sulphur-white irregu- 

 larly distributed. Length of the body (excluding antennas), one inch; of which 

 the proportions of the other parts are : greatest breadth, .09 ; length of superior 

 antennte, .8; of inferior antenna?, .3; of the third and fourth segments conjointly, 

 .34; of the anns to tip of finger, .47; of one of the last pair of legs, .33; of the 

 abdomen, .035. This beautiful species was dredged in great numbers adhering to 

 Gemellaria dumosa in ten fathoms, off Cheney's Head. 



Unciola irrorata, Say, Journ. Acad. Nat. Sci., Philad., i. 389. This large and 

 fmelj'-colored species is found here in considerable numbers, as well as on our whole 

 New England coast. It inhabits invariably sandy bottoms, usually in the lamina- 

 rian zone, but is occasionally found at low-water mark. The color of my .specimens 

 is bright red or vermilion, mottled with flake white. 



PoDOCERUS NiTiDUS, St., n. s. Small, slender, subcompressed, smooth and shining 

 above, and of a pale wine-yellow color. Head rather elongated, eyes oval, black, 

 placed obliquely at the bases of the superior antennas, a little below. Antenna; 

 slender, the superior ones most so, very hairy, about equal in length; the superior 

 ones having the longest flagellum. Thoracic legs of the first pair elongated, with 

 numerous long hairs on their edges, with the hand smaller and narrower than the 

 antepenultimate article, and a strong finger equalling the hand in length. Those 

 of the second pair large, with a short spine on the second article in front ; hand 

 large, oval, with a small curved finger of about half its length. The legs of the 

 third and fourtli pairs are very small ; those of the sixth and seventh long, and 

 with their terminal unguiform articli s strong and sharp. Caudal styles of the 

 first pair much the longest, reaching to the extremities of those of the second ; 

 those of the third pair small, biramous, with blunt tips. Length,^ 0.3 in. ; of which 

 the proportions of the other parts are : greatest breadth, .25 ; height at the middle 

 of the fourth thoracic segment, .25 ; length of the superior antenna), .0 ; of a leg 

 of the .second pair, .37 ; of a leg of the longest (seventh) pair, .5. This species was 

 dredged in thirty f\ithoms on a shelly bottom in the Hake Bay. 



' The length of an Ampbipod, as horciu given, is taken from the bases of the antenna; to the extremities 

 of the posterior caudal stylets. 

 7 



