120 THE PLUMULARIDJE. 



AGLAOPHENOPSIS VERRILLI, new species. 

 (Plate XXX, figs. 3-5.) 



Trophosome. Colony fiabellate, consisting of a main stem, giving off lateral branches, and 

 attaining a height of about nine inches; stem fascicled, the anterior tube giving off the hydro- 

 cladia; liydrocladia borne on main stem and branches, not very closely approximated, divided into 

 regular internodes, each with a number of small septal ridges behind the hydrotheca, and two at 

 the base of each mesial uematophore. liydrotheca- rather distant for this group, deep, almost 

 cylindrical; anterior margin nearly straight; intrathecal ridge very small and short; supracalycine 

 nematophores small, margins finely crenulated, not reaching the top of the hydrotheca; mesial 

 uematophore short, spur-like, only slightly aduate to the hydrotheca; margin crenulated; cauline 

 nematophores small, one or two on the front of each internode of the stem, and one in the axil of 

 each hydrocladium. 



GoiiOKOiiie. Gonangia obovate, borne OH protective appendages to the liydrocladia, which 

 spring from immediately behind the bases of the hydrotheca'; each appendage bifurcates shortly 

 above its origin, one branch bearing the gonangium at its base, several nematophores in a row on 

 its proximal portion, and a terminal hydrotheca; the other brauch is long and bears a row of 

 unmodified hydrotheca', with an extra uematophore behind the proximal one. 



Distribution. Albatross Station 2100, lat. K 37 41', long. W. 73 03'; depth, 1,407 fathoms; 

 Albatross Station 2573, lat. X. 40^ 34', long. W. 66^ 04'; depth, 1,742 fathoms. 



My attention was called to this species by Professor Verrill, who suggested that it was prob- 

 ably new, and I take pleasure in naming it in his honor. A. ren-illi was dredged from the greatest 

 depth at which any plumularian has been obtained. The deepest haul made by the Clidll/'injiT 

 which yielded a plumulariau (Cladocarpus peetiniferus Allnian) was 900 fathoms. 



Tyix- slides. Cat. Nos. 18690, 18691, U.S.N.M.; Cat. Nos. 15393, 15394, Mus. State Univ. Iowa; 

 also in the collection of the author. 



AGLAOPHENOPSIS CORNUTA (Verrill). 

 (Plate XXX, figs. 6-9.) 



cludocarpas corniitui VERRILL, Amer. Jourii. Sci. anil Arts, 1879, XVII, p. 310. 



Trophosome. Colony branched in a somewhat pinnate manner, the main branches and 

 brauchlets again branching piunately, the whole structure being rigid and tlabcllate, with all of 

 the branches and branchlets directed at right angles with the branches from which they originate; 

 total height about seven inches; stem fascicled, the hydrocladia being borne on an anterior tube 

 which is easily separable from the rest; hydrocladia alternate, not very closely approximated, 

 forming a right angle with the branches from which they arise; internodes divided internally 

 by about six strong septal ridges, and with a flattened, external, longitudinal ridge behind. 

 Hydrotheciv obcoiiical, rather deep, with a very large, anterior, wing-like keel or projection, 

 which begins immediately above the mesial nematophore and extends far above and beyond the 

 top of the hydrotheca; margin with five small teeth on each side; intrathecal ridge small and 

 oblique; supracalycine nematophores long, tubular, with creuulated apertures, reaching considera- 

 bly above the top of the hydrotheca; mesial nematophore nearly straight, spur like, with crenulated 

 margins, reaching to a point about opposite the middle of the hydrotheca; cauline nematophores 

 very large, one just at the base of each hydrocladium, another immediately below this, and a 

 third, long and spur-like, opposite the base of each hydrocladium. 



Gonosome. Gouangia borne on the terminal branchlets, oblong-oval, with lateral terminal 

 apertures; protective appendages unbranched or bifurcated, borne at the side of the proximal 

 hydrotheca on each hydrocladium, having a liydrotheca at its distal end, and two when it is forked. 

 There is an axial cavity divided by numerous strong septal ridges. 



Distribution. Off Sable Island, Nova Scotia, 200 fathoms. (Verrill.) Greenland, specimen 

 from Copenhagen Museum, given me by the Reverend Canon A. M. Norman. 



This is an unusually striking and well-marked species. Professor Verrill kindly furnished 

 me with specimens from which the above description and the drawings were made. The flattened 



