. Bulletin - United States National Museum. Science. 394 BULLETIN 15 8, UlTITED STATES NATIONAL MUSEUM KEY TO THE SPECIES (BOTH SEXES) L Terminal segmeut of first antennae with 5 small spines or den- ticles on inner margin at distal end serricornis (p. 242) Terminal segment of first antennae covered dorsally at tip with transverse rows of comblilie teeth anglica (p. 242) MONSTRILLA SERRICORNIS G. O. Sars Figure 242 Monstrilla serricornis Sars, Crustacea of Norway, vol. 8, p. 19, pi. 10, 1921 Occun^ence.—Taken in surface tow at Stations 20046, 20056, 20058, 20061, Grmrhfus^ in the Gulf of Maine
. Bulletin - United States National Museum. Science. 394 BULLETIN 15 8, UlTITED STATES NATIONAL MUSEUM KEY TO THE SPECIES (BOTH SEXES) L Terminal segmeut of first antennae with 5 small spines or den- ticles on inner margin at distal end serricornis (p. 242) Terminal segment of first antennae covered dorsally at tip with transverse rows of comblilie teeth anglica (p. 242) MONSTRILLA SERRICORNIS G. O. Sars Figure 242 Monstrilla serricornis Sars, Crustacea of Norway, vol. 8, p. 19, pi. 10, 1921 Occun^ence.—Taken in surface tow at Stations 20046, 20056, 20058, 20061, Grmrhfus^ in the Gulf of Maine in March and April, 1920. Distribution.—Coast of Norway (Sars); Gulf of Maine (Bigelow). Color.—Body transparent anteriorly but tinged with yellow posteriorly. Male.—Body short and stout and somewhat club-shaped in lateral view; cephalic segment a little longer than the rest of the metasome, its lateral margins nearly parallel, its ventral surface prominent anteriorly, but without an oral tubule. Urosome 4-segmented; genital segment with a subclavate copulative organ on its ventral surface; caudal rami small and divergent, each with five nearly equal setae. First antennae two-thirds as long as the ce- phalic segment, 5-segmented, the end segment with five small teeth on its inner margin at the tip; fifth legs lacking. Total length, mm. Female.—Unknown. Remarks.—The four stations of the Gram/pus named above are so widely scattered that they indicate that the species is likely to be found anywhere in the pelagic portion of the present area. It is also evidently very rare and can be regarded only as a straggler from the open ocean. Sars established this species upon two males taken on the coast of Norway, and all the specimens obtained here on the American coast have also been Figure 242.—Monstrilla serricornis: a, Male, dorsal (after Sars) ; i, male, end segment of first antenna MONSTRILLA ANGLICA Lubbock FlQUBE 243 Nat. Hist., ser, 2, vol. 20, p. 404,
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