. The Cambridge natural history. Zoology. 562 TELEOSTEI chap. between the inner surface of the quadrate and a descending process of the hyomandibular. Basis cranii double. Eibs very- slender, sessile, very low down on the centra; no parapophyses; epipleurals and epineurals. Pectorals inserted very low down. Post-temporal forked; postclavicle absent; a thin bony lamina, similar to the postclavicle, above the pectoral fin, attached to the scapula; scapular foramen in scapula; coracoids in contact with each other, forming a keel. Ventrals very small, with 7 rays. Brachiostegal rays 8. Air-bladder
. The Cambridge natural history. Zoology. 562 TELEOSTEI chap. between the inner surface of the quadrate and a descending process of the hyomandibular. Basis cranii double. Eibs very- slender, sessile, very low down on the centra; no parapophyses; epipleurals and epineurals. Pectorals inserted very low down. Post-temporal forked; postclavicle absent; a thin bony lamina, similar to the postclavicle, above the pectoral fin, attached to the scapula; scapular foramen in scapula; coracoids in contact with each other, forming a keel. Ventrals very small, with 7 rays. Brachiostegal rays 8. Air-bladder large, not communi- cating with the ear, incompletely divided into cells. Mucous membrane of the intestine forming a spiral fold. The body is very elongate and strongly compressed, covered with thin, deciduous scales; the vertebrae number 75. The dorsal fin is short and opposite to the anal, which is Fig. 340.—Side view of skull and pectoral-arch of Chirocentrus dorah. Chirocent7-us dorah, the only representative of this family, inhabits the Indian Ocean and the seas of China and Japan. Fam. 16. Clupeidae.—Margin of the upper jaw formed by the praemaxillaries and the maxillaries. Supraoccipital separat- ing the small parietals; opercular bones well developed. Basis cranii double. Eibs mostly sessile, inserted behind parapophyses; intermuscular bones (epineurals, epipleurals, adpleurals) usually numerous. Post-temporal forked, the upper branch attached to the epiotic, the lower to the opisthotic; post-clavicle applied to outer side of clavicle. Ventrals with 6 to 11 rays. Air-bladder large, communicating with the ear. Four sub-families:— (i.) Theissopatrinae.—Mouth large ; praemaxillaries very small; maxillaries large, with rather narrow supplemental bone, firmly attached to praemaxillaries; branchiostegals about 30; abdomen compressed to an edge, without serration; no lateral line. Thrissopater, from the Gault of Please note that these images are ex
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
