AMERICAN HYDKOIDtf. 113 



CLADOCARPUS OBLIQUUS, new species. 

 (Plate XXVII, figs. 1-3.) 



Trophosome. Colony loosely branching, a plumose stem, attaining a height of about 7 inches; 

 stem not fascicled, bearing hydrocladia only on its distal portion; hydrocladia straight, alternate, 

 divided into regular internodes, each of which has several (about eight) internal septal ridges. 

 Hydrothecix: closely approximated, ovate, with a regularly convex anterior profile, wider at the 

 center than at the top; margin with a single median tooth, and about four minute lateral sinua- 

 tions 011 each side; iutrathecal ridge short, straight, very oblique; supracalycine nernatophores 

 small, tubular, overtopping the hydrotheca; mesial uematophore short, free from the hydrotheca; 

 cauliue nematophores at the bases of the hydrocladia and on the front of the stem. 



Gonosome. Gouangia oblong-ovate, with latero-terminal orifice, borne in pairs on the bases 

 of the hydrocladia; phylactogonia like stag's horns, with two or three branches, arching over the 

 front of the stem. 



Distribution. Dredged oft' Habana, 200 fathoms; State University of Iowa Expedition; 

 U. S. Fish Commission .(label lost), from Professor Verrill. 



This species is more robust than its allies and differs from all of them in the regularly convex 

 anterior profile of the hydrotheca}. 



Type slide*. Cat. No. 15378, Mus. State Univ. Iowa; Cat. No. 18676, U.S.N.M.; also in the 

 collection of the author. 



CLADOCARPUS SEPTATUS, new species. 



(Plate XXVII, figs. 4-8.) 



Trophosome. Colony branched in a loose manner, attaining a height of about 8 inches; stem 

 not fascicled, divided into obscure internodes; hydrocladia rather closely approximated, divided 

 into slender, ttexuous iuteruodes, each of which has about ten imperfect septal ridges back of the 

 hydrotheca-, and also on the portion between adjacent hydrothec;e. Hydrothec;e gibbons, with a 

 veutricose swelling, giving a double curve to the anterior profile; margin with an anterior promi- 

 nent tooth, and three or four smaller lateral teeth on each side; iutrathecal ridge strong, rather 

 short, with its distal end curved abruptly upward; supracalyciue nematophores rather large, 

 swollen at the middle, and overtopping the hydrotheca^; mesial uematophore small, slender, free 

 from the hydrotheca, hardly reaching the level of the bottom of the latter; two cauline uemato- 

 phores at the base of each hydrocladium, and one on the front of each iuternode of the stem. 



Gonosome. Gouaugia oblong ovate, with latero-terrniual orifices, borne in pairs at the bases 

 of the hydrocladia. The young gonangia are triangular in outline; phylactogonia like a stag's 

 horn, with three to five branches; those from opposite sides of the stem do not bend over toward 

 each other so far as is usual in this group. 



Distribution. Albatross Station 2263, lat. N. 37 08', long. W. 74 33'; depth, 430 fathoms; 

 Albatross Station 2265, lat. N. 37 08', long. W. 74 36'; depth, 70 fathoms; Albatross Station 

 2269, lat. N. 35 13', long. W. 75 0.1' ; depth, 48 fathoms; Albatross Station 2310, lat. N. 35 44', long. 

 W. IV- 51' ; depth, 132 fathoms; Albatross Station 2422, lat. N. 37 09', long. W. 74 34'; depth, 85 

 fathoms. 



C. septutH* is more branched and longer than most of the members of this genus which are 

 nearest to it. The gibbous appearance of the hydrotheca seems to be a very constant feature. 



Type stifles. Cat. No. 18677, U.S.N.M.; Cat. No. 15379, Mus. State Univ. Iowa; also in the 

 collection of the author. 



CLADOCARPUS DOLICHOTHECA Allman. 

 (I 'late XXVII, figs. 9, 10.) 



Cladocarpiis dolichotlieca ALLMAN, Mem. Mus. Comp. Zool., 1877, V, No. 2, p. 50, pi. xxx. 



Trophosome. Colony uiibrauched, attaining a height of 2.V inches; stem not fascicled, with 

 several very oblique constrictions just below the proximal hydrocladia; internodes rather long and 

 slender, nodes hardly distinguishable; the hydrothecate portion of stem flexuous or slightly geuicu- 

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