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Show 1871.] MR. G. S. BRADY ON EUROPEAN CYPRIDIN1 D_E. 289 Head longer than broad; occipital process three times as long as wide at its base. Free portion of tail twice as long as high. Thoracic adhesive apparatus lozenge-shaped. Lips roughened, not fringed ; maxillary barbels reach to below the posterior margin of the orbit, the nasal ones short, the outer mandibular pair do not reach the gill-opening, but they are longer than the internal mandibular pair. Fins. Dorsal nearly as high as the body, its spine slender, its osseous portion being two-thirds as long as the head ; base of adipose fin as long as that of the first dorsal, and equalling two-fifths of the distance between the two fins. Pectoral spine broad and strongly denticulated, extending two-thirds of the distance to the base of the ventral. Caudal deeply forked. Air-bladder in two rounded lateral portions, very thin, and entirely enclosed by bone. Colours. Blackish brown. Fins yellowish, with black bands. Caudal black, with yellow margins. The G. trilineatum, Blyth, is distinct from this species, and apparently identical with that described by Dr. Giinther. The specimens in the Calcutta Museum do not appear to have comprised Mr. Blyth's typical example ; but a G. trilineatum has lately been received from Rangoon. 3. A Review of the Cgpridinidee of the European Seas, with Description of a n e w Species. By G E O R G E S T E W A R D S ON B R A D Y , C.M.Z.S. [Eeceived March 29, 1871.] (Plates XXVI. & XXVII.) Dr. G. O. Sars, in a memoir published in 1869 *, expressed his belief that two well-known Cypridinidae, heretofore considered as belonging to entirely distinct genera, are in fact merely the male and female of the same species,-Philomedes longicornis (Lilljeborg) representing the male, andBradycinetus brenda (Baird) the female. H e also, in the same place, propounded a similar view as regards Cypridina mariee (Baird) and G. teres (Norman). The latter proposition seemed to present no very great difficulty; but as regards the former several almost insurmountable obstacles presented themselves to m y mind. Thus a male form of Bradycinetus brenda, quite distinct from Philomedes longicornis, and nearly approaching in shape to the female, had already been described by Sars himself; so that the new theory involved the supposition of two distinct males ; then the structure and shape of the shell in B. brenda and P. longicornis are widely different; and, lastly, while (the male) P. longi- * Undersogelser over Christianiafiordens Dybvandsfauna anstillede paa en i Sommeren 1868 foretagen Zoologisk Eeise. PROC. ZOOL. SOC.-1871, No. XIX. |
