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latter, it is the female whose pouch receives the immature young, 

 and which are therein nourished to complete their development. 

 The parental relation of the female lophobranch, however, is re- 

 stricted to the simple emission of the unirnpregnated eggs. Be- 

 yond this, maternity she has none. The male is really father and 

 mother to the progeny/ ' 



The baby sea-horses measure about five to six lines in length, 

 and notwithstanding their thread-like and rounded tails, with 

 their semi-globular heads and short, wide snouts, there can be 

 no mistaking their parentage. At the very outstart, too, they 

 are in full possession of their little whip-like caudal appendages, 

 and they will, in passing each other, mutually extend them for 

 a common intertwinement, resulting in both the owners coming 

 to a standstill as they pull away in opposite directions. A more 

 enterprising member of the host may vary the program by 



FIG. 21. FRY or SEA-HORSE. 



By the Author, after Lockwood. 



curling its tail about the stumpy muzzle of some one of its numer- 

 ous brothers or sisters, and, for a moment, literally lead its cap- 

 tive relative about by the nose. It is said that there is no end to 

 the amusing antics they perform. 



" In the matter of foetal sustenance," says Lockwood, " I find a 

 remarkable marsupial analogy in the hippocampus. The pouch 

 of the kangaroo and the opossum contain teats, with which, by 

 true lactation, the young are nourished until fully formed. Nor 

 is the embryonal sack of the sea-horse a mere receptacle for the 

 hatching of the eggs, as nourishment is supplied to the growing 

 young. We know that the bear, during hibernation, lives upon 

 the fat acquired the previous season. During a journey that re- 

 quires abstinence from food, the well-conditioned camel will sub- 

 sist on the absorption of its fattened hump. The tail of the frog, 

 which has just completed its last metamorphosis, does not pass 

 off by atrophy, but is really a wise provision for the creature's 



