352 THE VOYAGE OF H.M.S. CHALLENGER. 



Station 158, March 7, 1874 ; south-west of Melbourne ; lat, 50° l'S.,long. 123° 4' E.; 

 1800 fathoms; Globigerina ooze; bottom temperature, 33°"5 F. One specimen. 



Remarks. — The general characters of this little species are altogether those of an 

 abyssal Antedon belonging to the Tenella-gvovq). It is remarkable for the shape of its 

 genital glands, which are short and thick (PL LXIX. figs. 7 a, b), instead of being long 

 and fusiform as in Promachocrinus kerguelensis and in Antedon eschrichti. 



3. Promachocrinus naresi, n. sp. (PL LXIX. figs. 8-10). 



1879. Promachocrinus naresii, P. H. Carpenter, Proc. Eoy. Soc, 1879, vol. xxviii. p. 385. 



Description of an Individual. — Centro-dorsal hemispherical, 9 mm. in diameter, and 

 covered except at the dorsal pole by the sockets of some forty cirri. 



Radials just visible ; the first brachial rather short and but little incised by the 

 second, which bears a pinnule. The next few joints are nearly oblong or quadrate, with 

 somewhat tubercular junctions and pinnules on their shorter sides ; the later joints 

 become more distinctly triangular and quadrate towards the ends. A syzygy in the 

 fourth brachial, and others at intervals of four to twelve joints. Sacculi abundant on 

 the pinnules. 



Colour in spirit, — brownish-white. 



Locality. — Station 214, February 10, 1875 ; off the Meangis Islands; lat. 4° 33' N., 

 long. 127° 6' E.; 500 fathoms ; blue mud ; bottom temperature, 41° - 8 F. One mutilated 

 individual. 



Remarks. — This specimen is unfortunately so mutilated that a complete description 

 of it is impossible. But it is obviously not identical with the other ten-armed species 

 just described, as it has a larger centro-dorsal with more numerous cirri, and the 

 arm-joints relatively shorter and more triangular (PL LXIX. figs. 5, 8). The general 

 characters of the arms and pinnules, so far as can be judged from the fragments of them 

 which are preserved, are essentially those of Promachocrinus kerguelensis. 



