AMERICAN HYDROIDS. 125 



* 



LYTOCARPUS CURTUS, new species. 

 (Plato XXXII, fijis. 8-11.) 



Trophosome. Colony irregularly branched, with a tendency to an alternate arrangement of 

 the branches, attaining a height of about <> inches; stem fascicled, the anterior tube bearing 

 the branchlets or hydrocladia; hydrocladia alternate, more distant than in the preceding species, 

 divided into regular iuternodes, each of which has a strong horizontal septal ridge opposite the 

 iutrathecal ridge, and a much less conspicuous oblique one at the base of the supracalycine nema- 

 tophores. Hydrotheca- stout, oval, with margins slightly contracted, and seven rather sharp, 

 incurved teeth; iutrathecal ridge strong, horizontal; supracalyciiie nematophores small, .just 

 reaching the level of the top of the hindmost marginal tooth; mesial nematophore short, spur-like, 

 with its distal end projecting slightly forward from the middle of the hydrotheca, which has a 

 small round aperture just above its junction with the mesial nematophore; cauline nematophores 

 considerably smaller than in the preceding species, not so definitely triangular in outline, two to 

 each internode of the stem; there is a perforated process at the base of each hydrocladium. 



fionosome. Not known. 



Jtiatribution. Shallow water between Little Cat Island and Eleuthera, Bahamas; State Uni- 

 versity of Iowa Expedition. 



This species shows the black granules in the c<enosarc, but they are not so numerous as in 

 L. clarki'i. 



Type slides. Cat. No. 15401, Mus. State Univ. Iowa; Cat. No. 18699, U.S.N.M; also in the col- 

 lection of the author. 



LYTOCARPUS FURCATUS, new species. 

 (Plate XXXII, figs. 12-15.) 



Trophonome. Colony divided into several large branches, which give off branchlets in a 

 straggling, irregular, pinnate manner, attaining a height of about 1 1 inches in the largest specimen 

 secured; stem fascicled, the anterior tube giving off the hydrocladia; hydrocladia rather sparse 

 and short, divided into regular iuternodes, each of which has a strong horizontal septal ridge. 

 opposite the intrathecal ridge. Hydrotheca^ deep, somewhat gibbous below, slightly flaring 

 immediately below the aperture, which is armed with about nine very sharp, strongly incurved 

 teeth, so strongly curved that their points are directed downward toward the center of the 

 hydrotheca; intrathecal ridge strong, but not reaching entirely around the hydrotheca; supra- 

 calycine nematophores forked, with anterior shorter portion reaching the level of the top of the 

 hydrotheca, and the posterior, much longer portion, reaching far above that level; both parts have 

 apertures at their ends; mesial nematophore short, spur-like, distal end free, pointed forward and 

 upward, and reaching a little above the middle of the hydrotheca; cauline nematophores very 

 large, two to each internode of the stem, triangular in outline, and greatly resembling those of L. 

 i/i-tniilix. There is a perforated process on the base of each hydrocladium. 



Gonutsoine. Not known. 



Distribution. Shallow water, between Little Cat Island and Eleuthera, Bahamas; State 

 University of Iowa Expedition. 



The bifurcated supracalycine nematophores of this species are, so far as I know, unique. 

 There is an approach to it in Halicunutriti dwiilioidcx Male, 1 in which these nematophores have 

 two, rarely three or four, tubular apertures. The incurved teeth of L. /iin-ntiin resemble those 

 of another of Bale's species, Aglaophenia phyllocarpa. 



Type xWcs. Cat, No. 15402, Mus. State Univ. Iowa; Cat. No. 18700, U.S.N.M.; also in the 

 collection of the author. 



'Catalogue of Australian Hydroid Zoophytes, 1881, p. 170, ill. xui, lig. 2. 



