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Show 1889.] MR. F. E. BEDDARD ON ^EOLOSOMA TENEBRARUM. 51 as it was unknown to the fishermen, Capt. Macdonald fortunately preserved it. Through the kindness of Lieut.-Colonel W . Gostwyck- Gard the well-preserved skin found its way to m e for identification, and the following diagnosis of the species is taken from it:- D.7I3L, A . 2 [ ^. The shape of the fish is that of a Horse-Mackarel, but it is fuller, reminding one of a Pilot-fish, which it also resembles in the small size of its scales. The mouth is rather wide, the maxillary extending to the hind margin of the eye ; both jaws are armed with a series of rather strong teeth, distantly placed. The dorsal spines are short and feeble, the anterior dorsal and anal rays forming a distinct lobe. Caudal deeply forked. Upper parts of a greenish-black hue, lower parts silvery, these two colours forming, where they meet, deep indentations by which they are dove-tailed into each other. By this peculiar coloration the fish can be recognized at a glance. Like other species of Lichia, it feeds chiefly on fishes of the Herring family, and the specimen here described was no doubt in pursuit of its prey at the time of its capture. 6. Note upon the Green Cells in the Integument of JEolosoma tenehrarum. By F R A N K E. B E D D A R D , M . A V F.Z.S. [Eeceived February 5, 1889.] (Plate V.) This Worm has been described by Vejdovsky ('Thierische Organ-ismen der Brunnenwiisser von Prag' (Prag, 1882), p. 61, and also ' System und Morphologie der Oligochaeten' (Prag, 1884), p. 21)1 as new, but it may possibly be identical with Nais aurigena of Eichwald (" Erster Nachtrag zur Infusorienkunde Russlands," Bull. Soc. Imp. Nat. Moscou, t. xx. 1847, p. 359). It has appeared lately in great numbers in a tank at the Society's Gardens, near to that which produced a new species, JEolosoma head/eyi (see m y paper " Observations upon an Annelid of the Genus JEolosoma," Proc. Zool. 1 A n American naturalist, Mr. F. W . Cragin, has recently described two species of JEolosoma (" First Contribution to a Knowledge of the Lower Invertebrates of Kansas," Bull. Wasbbourn College Lab. 1887, no. 8, p. 31), and as the periodical is perhaps not generally accessible, I take this opportunity of calling the attention of systematists to the paper. The first species is named JE. stolcesi, but 1 cannot discover any characters by which it can be differentiated from JE. quatemarium or JE. ehrenbergii. The chief points in the description are as follows :-" Body cylindrical .... with eight articulations ornamented with bright salmon-red nuclei .... most numerous near extremities ; setal fascicles in four rows .... each fascicle .... with four or five unequal simple bundles." The second species, JE. leiclyi, appears to be new and to be a near ally of JE. tenebrarum. It has " pale olive-green nuclei," and possesses "sigmoid spinelike setse " in all the seta-bundles ; in the posterior segments the fascicles are composed entirely of these setse. In JE. tenebrarum, as stated above, these setas are only found in the posterior bundles. 4* |
