EGGS AND LARVAE OF TELEOSTEANS. 119 



of protoplasm, which has a faint reddish tinge, and is as usual principally 

 accumulated at the micropylar pole. The ovum before fertilisation has a 

 slightly oval form, "95 mm. by *84 mm. in diameter. After fertilisation the 

 perivitelline space is very small. Hoffmann deals only with fertilisation and 

 segmentation, and gives no figures or descriptions of embryos or larvse. His 

 examination of the ova of Scorpoena was made at Naples. The ova of 

 Scorpsena are deposited in masses, each mass consisting of a large number of 

 ova enveloped by a slimy substance. Hoffmann believes that the slimy sub- 

 stance is not a product of the egg-membrane, but probably the peculiarly 

 modified connective tissue of the them folliculi. This conclusion seems 

 extremely unlikely, but no investigator has yet inquired into the origin of the 

 gelatinous envelopes which contain the ova of Scorpcena or of Fierasfer. The 

 newly hatched larva of Scorpcena is 2-07 mm. in total length, and the anus is 

 almost in contact with the yolk sac, -07 mm., according to Hoffmann,, being 

 the distance between the two. 



Hemitripterus americanus, C. and V. (H. acadianus, Storer.) — The ova 

 and larvse of this species are described by A. Agassiz in Pelagic Stages. 

 The ovum is pelagic, and possesses a single oil globule, which in the early stages 

 of development is at the pole of the yolk opposite the centre of the blastoderm. 

 Diameter of ovum, 1*02 to 1*10 mm. The developing embryo is distinguished 

 by the large number of brownish-yellow chromatophores which, interspersed 

 with a few black ones, are present on the sides of the body of the embryo, 

 and over the whole surface of the yolk. In the newly hatched larva the 

 rectum is separated by a very slight interval from the yolk. The fin-fold is 

 very wide, and in it are three pigment patches — two dorsal and one ventral. 

 The anus is apparently not perforated. The structure of the notochord is not 

 shown. The identification of these ova and embryos seems to be based on the 

 characters of the older stages of the larvae 



Fam. 7. Nandhle. 

 „ 8. Polycentrid^e, 

 „ 9. Teuthidid^ 



Div. II. Acanth. Beryciformes. 

 Fam. 1. Berycid^e. 



Div. III. Acanth. Kurtiformes. 

 Fam. 1. Kurtid^e. 



