IndioM Deep-sea Dredging. 135 



nearly 4 millim. in diameter the ovaries extend back to the 

 wide genital pore, through which they open to the exterior. 



Colours in life : — Head, including sclerotic and iris, black ; 

 body uniform dull slate-blue; pharyngo-branchial mucous 

 membrane and parietal peritoneum black. 



Note on the histology of the hind-gut. — In transverse section 

 the appearance somewhat resembles that of the human vas 

 deferens. Externally there is a thin fibrous coat containing 

 blood-vessels, and internal to this and intimately adherent to 

 it is a thin layer of longitudinally-arranged muscular fibres. 

 Inside this is a layer, averaging about lialf a millimetre in 

 thiclftiess, of dense, circularly-arranged, muscular fibres. 

 Internal to this is a submucous layer thrown into numerous 

 wide longitudinal folds, and invested by a single row of long 

 columnar epithelium, with numerous large goblet-cells. The 

 submucous coat in all the sections made is everywhere infil- 

 trated with round or oval, deeply-pigmented, highly granular 

 corpuscles, which measure from ttVo" to ^Voo of an inch in 

 diameter; in shape they resemble large leucocytes, but they 

 are so granular that no nucleus can in any instance be 

 detected. 



The thick muscular coat, the dense infiltration of the sub- 

 mucosa with these pigmented granular corpuscles, and the 

 large and numerous goblet-cells of the mucosa characterize 

 this part of the intestine. 



Several mature males and females were taken at Station 

 120, 240 to 276 fathoms. The males are a good deal smaller 

 than the females, of which the largest specimen measures 

 ir75 inches. 



Family Mursenidse. 

 CONGROMUK^NA, Kaup. 



47. Congromurcena longicauda^ Alcock. 



Congromvrcena longicauda, Alcock, Aim. & Mag, Nat. Hist., Dec. 1889, 

 p. 455. 



A large specimen from Station 120, 240 to 276 fathoms. 



NettastOiMA, Rafiaesque. 



48. Nettastoma tceniola^ Alcock. 



Gavialiceps tceniola, Wood-Mason, MS., Ann. & Mag. Nat. Hist., Dec. 

 1889, p. 460. 



This species was described from immature individuals and 



