CERATIIDAE 



355 



28.x. 25. 13° 25' N, 18° 22' W. 4^ m. net, horizontal, 900 (-0) m.: I specimen 15 mm. 

 ii.xi. 25. 6° 55' N, 15° 54' W. 2 m. tow-net, horizontal, 800 (-0) m.: i specimen, 17 mm. 



Hab. Atlantic; Gulf of Aden; Gulf of Panama. 



The specimen from St. 87 was examined alive on board the 'Discovery'. It was 

 observed continually to beat the water with the pectoral fins, suggesting that this action 

 was in some way connected with respiration. When the water was churned, as by pouring 

 in more salt water, or when the illicium was stroked, the luminous distal end emitted a 

 greenish blue light for half a minute or so. This phenomenon was noted three times. 

 Definite projections of the skin in the form of very fine black papillae were noted in six 

 places on each side of the body: three on each side of the lower jaw; one on each side of 

 the head between the nostril and the base of the illicium; and a pair on each side of the 

 back at the middle of the body. The position of these papillae is indicated in the accom- 

 panying figure. 



Fig. 44. Outline drawings of Cryptosparas couesii, showing the position of the papillae in the skin. 



A. Lateral view. B. Front view, (x i.) 



Mancalias uranoscopus (Giinther, 1878). 



Regan, t.c. p. 37, text-fig. 21. 



St. 293. 24. viii. 27. 4° 18' 15" N, 16° 51' 00" W. Young-fish trawl, 100-120 (-0) m. : 2 speci- 

 mens, 28-30 mm. 



28. X. 25. 13° 25' N, 18° 22' W. 4I m. net, horizontal, 900 (-0) m. : i specimen, 70 mm. 



Hab. Atlantic; Hawaiian Islands. 



Mancalias tentaculatus, n.sp. 



St. 1 14. 12. xi. 26. 52° 25' 00" S, 9° 50' 00" E. 45 m. net, horizontal, 650-700 m. : i specimen, 

 110 mm. (Holotype.) 



Closely related to M. uranoscopus. Basal bone of illicium a little more than \ length of 

 fish (without caudal), and little longer than the illicium itself; bulb pigmented proximally, 

 pale yellowish white distally ; at the tip of the bulb is a very small brown ring, close to 

 which are two small and almost transparent tentacles. In front of the pair of stalked 

 caruncles is a stout ray, which is nearly as long as the distance from the caruncles to the 

 upper ray of caudal fin, and about 3I in length of fish. 



Described from a single specimen, no mm. in length; holotype of the species. 



Hab. South Atlantic. 



In 1908 Tanaka described a somewhat similar fish, 440 mm. in total length, from 



