The Annals and magazine of natural history; zoology, botany, and geology . bo a bL. I 1 ^ q u- 566 Prof. R. Burckliardt on the cluster is slightly removed towards the snout and morereduced than that of L. rostratus. I met with some scatteredorgans on the anterior dorsal fin itself and also above theforemost gill-opening, while the supralateral row does notextend beyond the posterior dorsal. With regard to these organs in Lcemargus brevipennis, Iwas able, from a specimen in the Paris collection, to provetheir presence in this species, and to state the fact that theyhave a general resemblance to
The Annals and magazine of natural history; zoology, botany, and geology . bo a bL. I 1 ^ q u- 566 Prof. R. Burckliardt on the cluster is slightly removed towards the snout and morereduced than that of L. rostratus. I met with some scatteredorgans on the anterior dorsal fin itself and also above theforemost gill-opening, while the supralateral row does notextend beyond the posterior dorsal. With regard to these organs in Lcemargus brevipennis, Iwas able, from a specimen in the Paris collection, to provetheir presence in this species, and to state the fact that theyhave a general resemblance to those of L. borealis. It isquite probable that luminous organs are functional in themajority of the Lsemargidse, but possibly so in the young onlyof the two larger species, in which they most likely haveescaped observation. It is to the authentication in Isistius brasiliensis of theseorgans, however, that I attach particular value. Here, as in Spinax pusillus, similar conditions obtainedfor the non-uniformity of these structures in the differentspecimens which I consulted. For
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