399 



known by GRASSI and CALANDRUCCIO, has further been studied 

 by ElGENMANN, PETERSEN, JOH. SCHMIDT, HjORT a. O. 



We may presume that the indo-pacific species of Anguilla 

 have an equal life history, as during the Siboga-Expedition a 

 large number of Leptocepliali in different stages of development 

 were collected, some of which belong probably to the genus 

 Anguilla. The systematic position of others is still questionable. 



These forms are here shortly described; for further details 

 we refer to the descriptions in : Max Weber, Siboga-Expedition, 

 Fische, 1913, p. 63 78. 



Leptocephali possibly belonging to Anguilla. 

 i. Leptocephalus indicus M. Web. 



Leptocephahis indicus Max Weber, Siboga-Exp. Fische 1913, p. 74. 



Description of the single specimen known with 115 segments: 

 Length 115 mm.; height 14 mm.; head 5 mm.; distance of 



anus from tip of tail 34 mm., eye 1.3 mm., snout 1.2 mm., 



posttemporal part of head 2.5 mm. 



Height 8, head 23, tail 3.4 in total length. Eye 3.8, slightly 



longer than snout and about twice in posttemporal part of 



Fig. 195. Leptocephalus indicus M. Web. nearly nat. size. 



head. Snout somewhat rounded. Gape of mouth reaching 

 behind middle of eye. Anus below 73 rd segment, 2 1 / 3 times 

 farther from head than from tip of tail. No larval teeth. From 

 the definitive teeth, which are very small at any rate, only a 

 few at the frontborder of the upper jaw could be detected. 

 Pectorals rounded, small. Dorsal and anal with about 100, caudal 

 with 15 rays. In the last third of the length each myocomma 

 has 6 8 pigment spots on that part of the myocomma, which is 

 situated between its most ventral part and the chorda. Moreover 

 a pigment spot on the base of each dorsal, caudal and anal ray. 

 The single specimen was captured in the deep sea trawl, 

 hauled up from a depth of 1270 M., in the Sulu Sea, 6 15' N., 



