A treatise on zoology . a stridu-lating sound by the scraping of thefirst dorsal radial between theridged laminae of the deep cleft ofthe combined fourth and fifthneural spines (Haddon). The Siluroidei present somemost striking superficial resem-blances to the extinct Cephalaspidaeand Coccosteidae. So close is thelikeness (especially among theClariinae and Loricariidae) as evento deceive so acute an observeras Huxley [227]. It is nowgenerally admitted that the resem-blance between these Siluroideiand the Devonian fossils is due toconvergence. Family Siluridae. These fishusually have an adipose
A treatise on zoology . a stridu-lating sound by the scraping of thefirst dorsal radial between theridged laminae of the deep cleft ofthe combined fourth and fifthneural spines (Haddon). The Siluroidei present somemost striking superficial resem-blances to the extinct Cephalaspidaeand Coccosteidae. So close is thelikeness (especially among theClariinae and Loricariidae) as evento deceive so acute an observeras Huxley [227]. It is nowgenerally admitted that the resem-blance between these Siluroideiand the Devonian fossils is due toconvergence. Family Siluridae. These fishusually have an adipose fin. The tail region is extremely long in theClariinae, where both the anal and the dorsal fins are extended ; and inthe Silurinae, where the dorsal is very short and the anal very opercular bones are somewhat reduced. Clarias has accessory respiratory organs in the branchial cavity(Fig. 368) ; and in Saccohranchus a large diverticulum, suppliedwith blood from the aortic arches, extends back from the branchial. Fig. 305. Auchenoglanis hiscutatis, Geottr. A, ventralview of the pectoral girdle and left pectoral , ventral view of the pelvic girdle and leftpelvic fin. dt, eleithrnm ; eo, coracoid ; msc,mesocoracoid ; jj, pelvic bone ; pf, pelvic lepido-trichia ; s/), pectoral spine or first lepidotrich. 38o TELEOSTEI cavity below the trunk-muscles and acts as a lung (Fig. 369)(Burne [75]). Sub-Family Diplomystacix^. In which tlie maxilla is still toothed,and of considerable size. Diplomystax {Diplomystes), Dum. ; Chile. Sub-Family Clariinae. Clarias, Gron.; Heterobranclms, St. H.— Africa and Asia ; Pliocene, India. Cojndoghtnis, Gthr. ; Asia,
Size: 1047px × 2386px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
