. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fi<!. ".1.—The Bagre of Yucatan (('oiiorhi/iiclios iwIsohU). After Evcrraaiiii and (!oklst)()ruiigli. 1902), calling it Conorhynehos nelsonii. The accompanying figure will give an idea of what it looks like. It reaches a length of a foot to 18 inches. Two of the males obtained by Nelson had eggs in their mouths, one IG inches long having no less than 39 well-developed ones, and the other a single SALT-WATER CATFISHES, OR TACHI
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fi<!. ".1.—The Bagre of Yucatan (('oiiorhi/iiclios iwIsohU). After Evcrraaiiii and (!oklst)()ruiigli. 1902), calling it Conorhynehos nelsonii. The accompanying figure will give an idea of what it looks like. It reaches a length of a foot to 18 inches. Two of the males obtained by Nelson had eggs in their mouths, one IG inches long having no less than 39 well-developed ones, and the other a single SALT-WATER CATFISHES, OR TACHISURINES. While most of the catfishes are inhabitants of the fresh water, a few have accommodated themselves to life in the sea, and among such are the Tachisurines or Ariines, mostly called sea catfishes. The chief of these are slender, grace ful fishes, with comparatively small, bony, granu- lated head and six barbels; the anterior and poste- rior nostrils are close together. What is especiall>' remarkable, however, is the fact that of most spe- cies the female lays large eggs the size of a small fk;. lia^ru marble which, after fecundation, are taken by a iConor'vynr'.os nd- ' . sonn) hatching egg. male into his mouth and kept there until they are After Evermann and hatched. While such is the case for most species, <'^<^^A,boTough. however, it is not so for all, for several are said to oviposit on the ground and leave the eggs there to be cared for by the males, while one {Galeichthys or Hexanematichthys felis) has been declared to be ovoviviparous; this is the most northern of these fishes and occa- sionally wanders up to Cape Cod. THE EOG CAKKIERS. AAHien the breeding season has arrived the female gives evidence of it by an increased fullness of the belly, Avhich is the result of the enlargement of maturing or niatured eggs. The ovaries are in a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
