[B7]

Dr. Gunther (Sent May 12 to Dr. G.)

(3) Dr. G believes male alone crimson beneath

Yarrell Vol I p 81 speaks in a manner which makes me suppose blue that perhaps both sexes of some Gasterostei are crimson beneath. How is it? In some species, I see that neither sex are crimson beneath.

(8) (Mr Carbonnier maintains that the females of all fishes are larger than males: this must be rash generalization, but as far as facts known to you, is there any approval to [illeg] in to such a rule.

do you believe that the females are larger in most fishes

you told me of some Cyprinodontæ in which male not half size of ♀) Are males [few words illeg]

(Callionymus lyra, figure the 2 sexes, laterally. Am I right in supposing that the 2 sexes are described by Yarrell as C. lyra & dracunculus? Y. says nothing about 1st Dorsal fin being "brightly striped," which I believe that you said was the case.

[B8]

Gunther

are the sexes known to differ in colour in any other of the specially coloured sp. of Labrus, found in L. mixtus.

Do the sp of Gobius differ in colour sexually I ask because Cuvier (Re. Queries. p 242) speaks their nesting (Do any fishes which deposit their eggs in to mouths or in the marsupial sack of the male, differ sexually in colour.

Blennius pholis - smaller

(I have said that in the species of Blennius the crest is developed exclusively in the male in some species, in both sexes in some species, & in neither sex in at least one spe. viz. B. pholis.)

In Gasterosteus leiurus the lower surface of the male alone is crimson: I fancy the same exception and by Yarrell, that with some species of the genus both sexes have both underside crimson; & agree in other species neither sex are crimson - Do you know how this is