THE PLUMULARID^i. 93 



corbula' are present. The interuodes of the stein are bard to make out in all cases, and it is only 

 occasionally that one can satisfy himself as to the location of the nodes. They are usually distinct 

 in the following species, and thus afford a good character. 



Type. In the Museum of Comparative Zoology, Cambridge, Massachusetts. 



AGLAOPHENIA APOCARPA Allraan. 



(Plate XVIII, figs. 9-11.) 

 Aglaop/ienix upocarpa AI.LMAN, Mem. Mus. Comp. Zool., V, No. 2, p. 41, pi. xxiv. 



Tropliosome. Colony uubranched, attaining a height of about 2 inches; stem not fascicled, 

 divided into regular, rather long interuodes, each of which bears a hydrocladium on a process from 

 the middle of its antero-lateral aspect; hydrocladia rather distant, with slender internodes slightly 

 bent backward at the ends, forming a sinuosity between the hydrothec;e; no internal thickenings 

 of the internode. ITydrothec.a- separated by nearly one-half their height, about two and one-half 

 times as deep as the longest diameter of the aperture, slightly concave in anterior outline, with 

 the aperture tilted forward; margin with nine sharp teeth; iutrathecal ridge less oblique than in 

 preceding species; siipracalycine nematophores small, short, barely overtopping the hydrotheca; 

 mesial nematophore extensively adnate to the hydrotheca and not quite reaching the middle of the 

 latter; cauline nematophores two to each intemode of the stem, one near the middle and another 

 at the proximal end. 



Gonosome. Corbula with about ten pairs of leaves which do not touch each other; leaves 

 narrow, each with a row of nematophores on its distal and another on its proximal edge. There 

 is a single hydrotheca between the corbula and the stem. 



Distribution. Off Sand Key, Florida; depth, 100 fathoms; Milligans Key, 1-4 fathoms 

 (Fewkes); Albatross Station 2157, lat. N. 23'= 10', long. W. 82 21'; depth, 29 fathoms; Pourtales 

 plateau (off Florida Keys), IK! fathoms, State University of Iowa Expedition. 



The trophosome of this species can with difficulty be distinguished from the last. The best 

 character is in the fact that the canliue internodes bear the hydrocladia on projections from their 

 distal ends in A. luphocarpa, and from their middle portions in A. iipocarpa. The corbuhe are, 

 of course, quite, distinct. 



Type. In the Museum of Comparative Zoology, Cambridge, .Massachusetts. 



AGLAOPHENIA FLOWERSI, 1 new species. 

 (Plate XIX, figs. 1,1'.) 



Trophoxome. Colony branched, the branches again dividing into branchlets, attaining a height 

 of about (> inches in the type specimen; stem not fascicled, divided into regular internodes, each 

 of which bears a hydrocladium on a process springing from near its distal end ; hydrocladia growing 

 further down on the main stem than in many of this group, divided into rather slender internodes 

 which are usually without internal thickenings. Hydrotheca- closely approximated for this group, 

 deep, tubular, margin with an anterior slightly recurved tooth, and three rather shallow lateral 

 ones on each side; apertures somewhat oblique; iutrathecal ridge very short, scarcely evident; 

 supracalyciue uematophore small, attaining the level of the top of the hydrotheca; mesial nemato- 

 phore short, stout, adnate except at the distal end, not attaining half the height of the hydrotheca ; 

 cauline nematophores two on the front of each iuternode, and a spur-like perforated process at the 

 base of each hydrocladium. 



Gonosome. Corbuhe borne usually in the axils of the branches, very long and slender, com- 

 posed of about twenty pairs of leaves; the distal portion of each corbula is open at the top from the 

 failure of the leaves to meet above; the leaves on the distal third have few or no nematophores; 

 the proximal portion is composed of leaves, each of which has a row of numerous small nematophores 

 along its distal edge; one or two more or less modified hydrotheca/ between the corbula and 

 the stem. 



.Distribution. Off Sand Key, Florida, 11< fathoms, State University of Iowa Expedition. 



1 In honor of Captain Charles Flowers, the efficient sailing master of the State University of Iowa Bahama 

 Expedition. 



