220 Records of the Indian Museum. [Vol,. IX, 



The madreporite plate is very evident, standing up as a pro- 

 minent convexity from the general surface, and projecting so as 

 partially to occupy the soft inter-brachial space. 



This species is readily distinguished from the following by the 

 complete absence of small granular ossicles on the dorsal surface 

 of the disc and by the much greater relative size of the openings of 

 the genital bursae, which, in this specimen which has a disc 60 mm. 

 in diameter, measure from 16 to 18 mm. 



The form of the girdle hooks is seen in text-fig. i. 



Astrodcndrum sagaminum (Doderlein), 1902. 



I include under this name two small specimens from Station 

 333 (Regd. no. ZEV ^'). 



The larger of these has a disc measuring I2"5 mm. in diameter, 

 the smaller is clinging to the larger specimen and its disc mea- 

 sures ^'8 mm. 



The skin of the disc is very nearly transparent, and contains 

 numerous small granules, which are also present on the upper 

 surface of the radial shields. The upper surfaces of the arms also 

 are finely granular. 



The apertures of the genital bursae, though relatively smaller 

 than those of A. laevigaium, are comparatively larger than in the 

 example oi A. sagaminum which is figured by Doderlein (5). They 

 measure 2 mm. in the larger and o'g mm. in the smaller specimen. 

 But it may well be that the relative sizes of these apertures and 

 the disc would be subject to alteration during growth up to the 

 attainment of maturity. These are both young specimens and 

 their discs are small, so that the basal end of each arm is quite 

 free from the disc : in a dorsal view of the larger specimen two 

 arm segments, and of the smaller four arm segments, are visible 

 beyond the disc margin and before the occurrence of the first 

 bifurcation of the arms. 



Astrocladus doflcini, Doderlein, 1910. 

 (PL xiii, fig. I.) 



One specimen (Regd. no, ZEV ~^) from Station ^67, at a 

 depth of between 42 and 75 fathoms, off the west coast of the 

 south of India. This specimen, though the disc is complete, has 

 all its arms fractured just beyond their first bifurcation. 



The disc, measuring from the end of a radial shield to the 

 opposite inter-brachial margin, has a diameter of 28 mm. The skin 

 on the upper surface of the disc is opaque and finely granular, the 

 shields being indicated by radiating ridges. Besides the fine gra- 

 nulations there are tuberosities which are very regular in their 

 arrangement. In the centre of the disc they form a cluster of small 

 round tubercles of various sizes. In each inter-radial and inter- 

 brachial depression many of these tubercles are rather larger than 



