No. 19.] ECHINODERMS OF CONNECTICUT. 65 



or a few much larger pedicellarise are found on the oral surface 

 of the disk in each of the angles between the rays. 



When the spines of the disk are free from pedicellariae, groups 

 of such organs appear at the beginning of the rays near the 

 bases of the spines, and these groups develop into conspicuous 

 wreaths on the more prominent spines of the rays. The wreaths 

 are most conspicuous on the large spines about the ambulacral 

 grooves and toward the tip of the rays (Plate X, fig. i). 



The individual pedicellarias in these wreaths, while relatively 

 large as compared with the size of the spine, are much smaller 

 than in our two other species of the genus (Fig. 8). They are 

 usually oval in outline, with rather blunt points. 



The madreporic plate is small, and provided with a few very 

 wide furrows. 



The branchias are usually separate or in groups of two in 

 each branchial area. 



As is the case with several other species of the genus, this 

 little starfish protects its eggs and young beneath the disk,' and 

 carries about with it the young clinging to the partially everted 

 borders of the mouth. 



Henricia sanguinolenta (O. F. Miiller) 



Blood Starfish 



Plate I, figs. 1—3; Plate XL 



This beautiful little starfish is known in the writings of most 

 American zoologists by the name of Cribrella sanguinolenta. It 

 has recently been shown, however, that the generic name Hen- 

 ricia must take precedence over the more familiar Cribrella. 



Like the preceding species, this is more properly a northern 

 form, and grows far more abundantly and of larger size along 

 the coasts of Maine and Labrador than farther south. It occurs, 

 however, in the cold, deep water off our coast as far south as 

 Cape Hatteras, and has been taken at a depth of more than a 

 thousand fathoms. 



Explanation of Plate XI. Henricia sanguinolenta. 

 Fig. I. Aboral surface of disk, showing madreporic plate, intestinal 

 opening, and arrangement of spines; three times natural size. 

 Figs. 2 and 3. Aboral and oral surfaces; about two-thirds natural size. 

 Fig. 4. Oral surface of dried specimen; sligihtly enlarged. 

 5 



