140 MXTB^NID^. 



s-x. Messina. Named L. diaphanus by Dr. Kaup. 

 2/-/?. Nice. Purchased of Mr. Wright. 

 y. Australia. From the Haslar Collection. 



/3. Forms of L. morrisii showing signs of a more advanced development. 

 In these, the snout is somewhat less obtuse, somewhat more 

 pointed and produced. 



ua. The body is compressed, the chorda dorsalis without ossifica- 

 tions, sh owing -mei'cly segmentations : — Leptocephalus hihronii, Kaup, 

 Apod. p. 149, fig. 12 ; and Leptocephalus gegenhauri, Kaup, Apod, 

 p. 149. fig. 11. 



a. Messina. Named L. hihronii by Dr. Kaup. 



h. Mediterranean. Named L. gegenhauri by Dr. Kaup. 



/3/3. The body has become more cylindrical in consequence of the 

 development of the muscular system ; yet the chorda dorsalis is stiU 

 cartilaginous : — Leptocephalus holllkeri, Kaup, Apod. p. 148, fig. 10 ; 

 Leptocephalus punctatus, Kaup, Apod. p. 148, tig. 8. 



u. Messina. Named Z. Jcollikeri by Dr. Kaup. 



b. Mediterranean. Purchased. 



b. Indian Ocean and Archipelago. 



Helmichthys oculus, Peters, Monatsber. Ak. Wiss. Berlin, 1866, p. 525, 

 fig. 4. 

 Body rather thick, in consequence of the development of the mus- 

 cular system; chorda dorsalis cartilaginous, but with the neural 

 arches distinct. Snout obtusely rounded, short. Eyes large. Pec- 

 toral fins developed ; vertical fins very low. Vent near to the 

 middle or the total length. Jaws with minute teeth. 



Amboyna ; Madagascar. 

 a. Madagascar. Presented by Dr. J. E. Gray. 



2. End of the tail jyrolonged into a tapering point. 

 Leptocephalus acuticaudatus, Kaup, Apod. p. 151 , fig. 16. 

 Body compressed, its depth being more than the length of the head, 

 which is rather small. End of the tail prolonged, tapering. Snout 

 obtusely rounded. Pectoral fins. Teeth none. 

 Malabar. 



B. Pectoral fins none. 



Leptocephalichthys hypselosoma, Bleek. Act. Soc. Sc. Indo-Neerl. i, 



Manado, p. 69. 

 Leptocephalus hypselosoma, Bleek. Atl. Ichth. Mur. p. 124, pi. 37. 

 fig. 5. 

 Body corapiessed, rather short, of moderate depth. Head small. 

 Snout obtuse. Pectoral fins none. Jaws toothless. 

 a. Type of the species, in very bad state. Celebes. Prom Dr. 

 Bleeker's Collection. 



