THE PLUMULARIDJE. 101 



Gonosome. Unknown. 



Moutserrat, 88 fathoms. 



The above is the original description copied verbatim. No figure is given, and the type was 

 not sent with the rest of Doctor Fewkes's specimens from the Museum of Comparative Zoology. 



The description is inadequate, especially in the absence of a figure, and the species is of 

 doubtful validity. 



The type is presumably in the Museum of Comparative Zoology. 



AGLAOPHENIA RATHBUNI, new species. 

 (Plate XXII, figs. 4-6.) 



Trophosome. Colony unbranched, attaining a height of three-fourths inch ; stem not fascicled, 

 divided into numerous short internodes by oblique nodes; hydrocladia alternate, closely approxi- 

 mated, borne on the front of the stem and projecting nearly at right angles with the stem; 

 divided into short internodes, each of which has a strong septal ridge opposite the intrathecal 

 ridge extending almost around the interuode, another shorter one just beneath the supracalycine 

 nematophores, another short but evident one between the two already described, and still another 

 below the intrathecal ridge. Hydrotheca' robust, closely approximated, set at a strong angle with 

 the hydrocladia, as if tilted forward, the distal half being free; anterior profile with a double curve; 

 aperture wide, oblique; margin with an anterior projecting bifid spine, and eight or ten irregular 

 teeth giving a jagged appearance; ititrathecal ridge strong, very oblique, reaching entirely around 

 the hydrotheca; snpracalycine nematophores not reaching the top of the hydrotheca; mesial 

 nematophore prominent, projecting forward and upward, free for about one-third its length; a 

 mammillate perforated process at the base of each hydrocladium. 



Gonosome. Corbnla long, curved, with seven or more pairs of broad leaflets, each of which 

 has a row of uematophores along its distal edge, and a very prominent, heavy spine projecting 

 forward and outward from its base; this spine has a strong spur projecting upward and forward 

 from its upper side. There is a single hydrotheca between the corbula and the stem. 



Distribution. Caravellas, Brazil, 1876; Richard Rathbun. 



This is an exceedingly well marked species. The corbuhe are borne on hydrocladia which 

 alternate regularly with the ordinary hydrocladia, and are directed laterally, giving a beautiful 

 example of the hoinology of the corbula with the hydrocladinm. 



Type slides. Cat. Nos. 18657, 18658, U.S.N.M. ; Cat. Nos. 15364, 15365, Mus. State Univ. Iowa; 

 also in the collection of the author. 



AGLAOPHENIA LATIROSTRIS, new species. 

 (Plate XXII, figs. 7-9.) 



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

 divided into regular internodes, each of which bears a hydrocladium; hydrocladia lying in the 

 same plane, alternate, closely approximated, and projecting at right angles from the stem; hydro- 

 cladial iuteruodes distinct, each with a septal ridge behind the intrathecal ridge. Hydrotheca? 

 closely approximated, obcouical, margin expanded, and surrounded by eleven very irregular jagged 

 teeth, the anterior one being retrorse, the next directed forward, the remaining four on each side 

 being in two pairs of sharply pointed teeth; iutrathecal ridge evident, oblique, reaching nearly 

 around the hydrotheca; lateral uematophores rather small for this group, not reaching the top of 

 hydrotheca; mesial nematophore very large, aduate to the front of the hydrotheca nearly to the 

 top, and then projecting forward into an expanded spout-like distal extremity which often reaches a 

 considerable distance in front of and above the hydrotheca. 



Gonosome, Corbula closed, composed of about eight pairs of moderately narrow leaves, each 

 of which bears a row of nematophores on its distal edge, and another on its inner proximal edge, 

 as in A. struthionMeii. 1 There is an aperture between the bases of adjacent leaves, and no promi- 

 nent spur at the bases. There are two hydrotheca' between the corbula and the stem. 



1 Only tlie row on the outer distal edge can be readily seen without dissection. 



