ALEPOCEPHALIDAE 



269 



Bathytroctes (Bathytroctes) sp. 



St. 85. 23. vi. 26. 33° 07' 40" S, 4° 30' 20" E. 4i m. net, 2000 (-0) m. : i specimen, 56 mm. 



This young specimen agrees very closely with those described above, but the anal fin 

 originates belov^^ the anterior part of the dorsal. The "supraclavicular process" is 

 present, but the luminous organs are much less developed. 



Bathytroctes (Talismania) homopterus, Vaillant. 



i, Exped. Set. ' Travailleur ' et ' Talisman ', Poissons, p. 1 53, 



Batliytroctes homopterus, Vaillant, i< 



pi. xii, fig. I. 



Bathytroctes {Talismania) homopterus, Goode and Bean, 1895, Ocean. Ichth. p. 43. 



St. 269. 26. vii. 27. 15° 55' 00" S, io°3s'oo"E. 4|m. net, horizontal, 600-700 (-0) m. : 2 

 specimens, 83-100 mm. 



28. X. 25. 13° 25' N, 18° 22' W. 4J m. net, horizontal, 900 (-0) m. : i specimen, 47 mm. 



Depth of body 4^ in the length, length of head a little more than 3. Snout a little 

 shorter than eye, diameter of which is about 3 J, in length of head and equal to interorbital 

 width. Upper part of operculum with a series of diverging ridges ending in feeble 



Fig. 2. Bathytroctes {Talismania) homopterus. (x i.) 



pointed projections. A pointed membranous process above the clavicle. Praemaxillary 

 somewhat protruding, bearing two or three forwardly directed teeth anteriorly, of which 

 the inner are longest, followed by a series of smaller conical teeth ; the anterior teeth are 

 more prominent in the young; maxillary toothed, extending to below middle of eye or 

 a little beyond. About 20 gill-rakers on lower part of anterior arch. 67-75 scales in a 

 longitudinal series. Dorsal 18-20; origin a little nearer posterior edge of operculum 

 than base of caudal. Anal 16-18 ; origin slightly behind that of dorsal. Caudal peduncle 

 1 1 times as long as deep. 



Described from three specimens, 47 to 100 mm. in length. 



Hab. North Atlantic. 



Professor L. Roule has kindly compared one of these specimens with the type of the 

 species preserved in the Paris Museum, and writes as follows : " Quant a la specification, 

 elle penche plutot, a mon avis, apres examen, du cote B. homoptera Vaillant. Pourtant, 

 I'exemplaire etant unique, et de petite taille, il m'est malaise d'opiner avec surete ". It is 

 of interest to note that the "supraclavicular process" is still present in the largest 

 example. 



