80 PROCEEDINGS OF THE ACADEMY OP perennial grass, with the aspect of a Mulenbergia or of a Polypogon, but with a coma of silky hairs around the flower, as in a Calamagrostis. Culm a foot and a half high, from a creeping rhizoma, retrorsely pubescent at the nodes. Sheaths scabrous, equalling the internodes ; ligule short, fringed ; leaves 3 or 4 inches long, dull green, rough on both sides. Panicle lead-colored, about 3 inches long ; the branches solitary, appressed, densely many-flowered. Spikelets very short-pedicelled, compressed, pubescent, a line and a half long. Glumes narrow, very acute, serrulate on the keel, the lower a little the longer. Awn rough and flexuose, purplish, three or four lines long. O. Thurler. FILICES. C87. Aspidium Filix-mas, Swartz. ; apparently identical with the European plant. 688. Cryptogramme acrostic hoides, R. Br., by Sir Wm. Hooker re-garded as a variety of AUosorus crispus. 689. Asplenium septentrionale, L. This was collected by C. "Wright farther south ; and these two stations are the only known American ones. 690. Cystopteris fragilis, Bemh., mixed with a "Woodsia, the same as Parry's 394, formerly named W.obtusa; but it is of a different species. 691. Cheilanthes Fendleri, Hook. 692. Asple-nium Trichomanes, L. 693. Nothochl.exa Fexdleri, Kunze, Filices, 2, p. 87, t. 136 ; the same as Parry's 396. A species recently distinguished from N. dealbata. 694. Polypodium vulgare, L. 695. P. Dryopteris, L. Catalogue of the FISHES of Lower California, in the Smithsonian Institution, Collected by Mr. J. Xantus. BY THEODORE GILL. PART IV. Subfamily SERRANIN.E (Swainson.) Nine genera of this subfamily are now known to be represented by species along the western coast of America and the Gallapagos Islands. They may be thus distinguished : I. Caudal with the lobes acuminate. Lateral line before superior, deflected behind Pronotogrammus. Lateral line normal Brachyrhinus. II. Caudal not forked. A. Canine teeth developed. B. Dorsal spines XI. C Nostrils in a vertical row Mycteroperca. CC. Nostrils in a longitudinal row. Body oblong; smooth above lateral line Labroperca. , Body oval, with ctenoid scales Epinephelus. BB. Dorsal emarginated ; spines X. C. Head with profile decurved, scaly above.. Paralabrax. CC. Head conic ; naked between eyes. Spinous dorsal rounded Atractoperca. Spinous dorsal, incurved behind the third elon-gated spine Gonioperca. AA. Canine teeth entirely obsolete Dermatolepis. The preceding table gives only the more striking characters ; those are accompanied by others, which appear to amply authorize their generic dis-tinction. In the table, the genera do not follow each other in a strictly natural order. Genus PRONOTOGRAMMUS Gill. This genus has the form of Brachyrhinus. The body is covered by moderate, [Mar.