VerriU.] 388 [April 7, 



Panama, and Zorrltos, Peru, have been collected at La Paz, by 

 Capt. Pedersen. Tlicy occurred, as usual, adhering firmly to the 

 branches of Murlcea. 



The largest t^pociincn has a disk tliree inches in diameter. 



Astrophyton Stimpsonii VerriU, sp. nov. 



A hirge species allied to A. Lamarctil, with crowded, large, rounded 

 granules on the ribs and arms, larger scattered ones on the disk be- 

 tween the ribs, and smaller scattered ones on the interradial spaces 

 below. 



The ten ribs are long and narrow, nearly equidistant, extending to 

 very near the centre, narrowed at the inner end, and but slightly en- 

 larged close to the outer end, entirely covered with crowded, large, 

 prominent, round-topped grains ; a border of similar grains surrounds 

 the edge of the disk, connecting with those at the end of the ribs. 

 Centre of disk crowdedly covered with similar granules; the spaces 

 between the ribs with distant, unequal, larger, round grains, or small 

 tubei'cles, irregularly grouped. Region around the mouth and lower 

 side of arms smooth; interradial regions with scattered, round gran- 

 ules, smaller than those on the ribs, upper side of arms covered 

 throughout with closely crowded, prominent, rounded granules, a little 

 smaller than those on the ribs. Arm-spines, between the first and 

 second fork of the arms, in groups of four or five, subequal, short, 

 obtusely pointed; between the second and third forks, in groups of 

 five or six, nearly equal. 



Color of the dry specimen brownish yellow ; lower side of disk and 

 arms reddish brown. 



Diameter of disk 3.10 inches; length of ribs 1.50; breadth at mid- 

 dle .20; diameter of rib granules .03 to .04 ; of largest disk granules 

 .05; radius from centre of mouth to first division of the arms 1.35 ; 

 to second fork 1.70 ; subsequent forkings at irregular distances. 



Ochotsk Sea; Robt. E. C. Stearns, 186 7. 



A smaller specimen with the disk 1.25 inches in diameter, is in the 

 collection of the Chicago Academy. It was collected by the North 

 Pacific Exploring Expedition in the Arctic Ocean, north of Behring's 

 Straits. The central part of the disk is less granulous, and the 

 spaces between the mouth and interbrachial areas are finely granu- 

 lose. Outside the genital openings are from three to six prominent, 

 sharp grains. 



Ophiarachna maculata VerriU, sp. nov. 



A large yellowish brown species, with stout arms, finely spotted 

 with dariier on the upper surface. 



