1890.] NAJTHAL scii:x('i:s or piiiladi:i-1'hia. 819 



The distal ])ortions of the canals are enlarged, so as to form elon- 

 gated heads. Two of the canals on the left side are branched, 

 thus possessing two heads. 



A single long and slender Polian vesicle exists, which is more than 

 half the length of the animal, and terminates in a vesicular enlarge- 

 ment of consideral)le sizi'. 



Cuvei'ian organs are not present. 



In the walls of the dorsal pedicels are tables of the ordinary type 

 described below, and a few rosettes. Around the terminal disks 

 there are also tables which lack disks, the four rods bending inwards 

 and uniting at the point where they meet. The ventral pedicels oc- 

 casionally possess a few diskless tables around the edge of the ter- 

 minal disk similar to those of the dorsal pedicels, and their Avails 

 contain a few rosettes. The calcareous deposits of the body-wall 

 are ct)llected into heaps which give its surface a granulated appear- 

 ance. They consist j)rincipally of rosettes which occur in great 

 abundance. They are usually about 'Olo mm. in diameter. The 

 branches of the rosettes, in rare instances, coalesce to form irregular 

 })erforated plates. On the dorsal surface the accumulations of ros- 

 ettes are accompanied by a number of tables, which possess well de- 

 veloped disks and are of the Holothurla atra type, usually with a 

 hole at the base of each rod. Exceptionally the hole is absent or 

 it may be represented by two or three similar holes. The rods are 

 connected by a single cross-bar. Each of the rods is surmounted by 

 three prominent teeth, two horizontal and one vertical. The height 

 of the tables and the diameter of their disks is about "1 mm. The 

 tables are almost entirely absent from the accumulations of the ven- 

 tral surface. 



The color in alcohol, of the granulated portion of the body is a 

 dirty olive green ; the portions free from deposits are slate-color 

 with a purplish tinge; the sides of the pedicels grayish and their 

 disks straw-color; tentacles very light straw-color. 



Length of the much contracted specimen about 80 ram. 



Collected among the wet seaweed of the beach at the Port of 

 Silam. 



I have named this species after Professor Angelo Heilprin, the 

 Director and promoter of the expedition. 



This form is related to Holothuria atra of Jaegei'. The most 

 prominent difference is the arrangement of the calcareous deposits 

 into heaps in Holothuria Heilprinl, producing an appearance of 



