. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Henn: South American Pceciliid Fishes. 127 the male inperted at about the proximal third of the entire length; ventrals thoracic, minute, not modified. First and second anal rays of the male minute; third, fourth, fifth, and sixth, much prolonged. The third ray forms an obtuse angle near its tip, where it is produced dorsally, joining the tip of the fourth to form the pedicle of the ter- minal process. The fifth ray is longest, terminating in a point; pos- teriorly there is a series of about
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Henn: South American Pceciliid Fishes. 127 the male inperted at about the proximal third of the entire length; ventrals thoracic, minute, not modified. First and second anal rays of the male minute; third, fourth, fifth, and sixth, much prolonged. The third ray forms an obtuse angle near its tip, where it is produced dorsally, joining the tip of the fourth to form the pedicle of the ter- minal process. The fifth ray is longest, terminating in a point; pos- teriorly there is a series of about six retrorse hooks upon its dorsal ridge. Sixth ray compressed posteriorly, bending ventrally to join the fifth. Seventh, eighth, and ninth raj's normal, successively shorter. The terminal organ has the form of a scoop and there is a compressed horn or extension on each side. This is poised at right. Fig. 9. Phallotorynus fasciolalus Henn. Inferior view of premaxillaries with teeth. One tooth probably missing from left ramus. X 26. No. 3754, Carnegie Museum. angles to the pedicle. There is a single series of teeth, shaped like spoon-oars, in each jaw. The tips of the teeth are slightly expanded and bent backward. The intestine is about twice the length of the entire fish. This remarkable little fish has attained a high degree of complexity in the apparatus for the transfer of spermatozoa to the female. The sperm-duct, as in related genera, opens backward at the very base of the anal. The sexual products probably appear in the form of the sperm-aggregations, the occurrence of which in Phalloceros caudoma- culatus has already been mentioned. The hinder portion of the anal fin seems to be somewhat flexible and may fold over the inflexible prolonged rays, to form a groove or trough which would have the open side along the ventral edge. The close apposition of the two edges of the fin would form a channel for the conduction of the sexual products. The ventral fins are too small to b
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