638 MR, C. TATE REGAN ON TELEOSTEAN FISHES [Juiie 18, 



The vertebral column comprises 90 vertebi'fe ; the prpecaudals 

 have downwardly directed paraj)ophyses ; ribs appear to be absent. 

 The pectoral arch differs from that of Velifei' in that the post- 

 temporal is simple and that the pectoral pterygials are 3 in 

 number, two of which ai-e inserted on the coracoid. 



The pelvic bones resemble those of Velifer in structure and 

 attachment, but have the posterior angle produced and embraced 

 by the extremities of the post-clavicles. 



The skeleton of Eegalecus has been described by Parker *' and 

 Dunbar t. I have examined the large skeleton described by 

 Parker, which is essentially similar to that of Trachypterus, 

 differing in the absence of a basisphenoid and in the presence 

 of some feeble ribs. 



The post-frontal and pro-otic bones in liegcdeciis are situated as 

 shown in the accompanying figure of Trachypterus (text-fig. 168, 

 p. 637). 



The descriptions of both Parker and Dunbar, who have deter- 

 mined the greater j)art of the pro-otic bone as opisthotic, are 

 erroneous. 



The pelvic bones in Regcdecus are considei-ably largei- than in 

 Trachypterus and their anterior edges lie between the clavicles. 



Lophotidce.. 



I have examined a spirit specimen of Lophotes ce2)eclianus. The 

 moderately protractile mouth is similar in structure to that of 

 Trachypterus ; by depressing the large eye of one side I have 

 been able to ascertain that an orbitosphenoid bone is present 

 and that it is in contact with the mesethmoid, Avhich is entirely 

 posterior to the prtefrontals ; dissection of the base of the j^ectoral 

 fin on one side shows that the relations of scapula, coracoid, and 

 pterygials ai'C as in TracJiypter'iijS. 



For Lop)liotes Jiskil Gthr. I propose the new generic name 

 E%mieciclithys%. The mouth is non-proti'actile, the posterior 

 processes of the pra?maxillaries having their extremities attached 

 to the anterior face of the vomer, instead of sliding backwards 

 and forwards on each side of a median longitudinal keel, as in 

 Lophotes. 



2. Definition and Classification of the Suborder Allotriognathi. 



Suborder Allotriognathi. 



Supraoccipital well-developed, separating the parietals ; no 

 opisthotic ; an orbitosphenoid, anteriorly in contact with the 

 mesethmoid, which is wholly or in part posterior to the prte- 

 frontals. Mouth typically protractile ; . maxillary with an outer 



* Trans. Zool. Soc. xii. 1886, pp. 5-33, pis. ii.-vi. 



t Proc. Zool. Soc. 1906, pp. 547-566, pis. xxxviii. & xxxix. 



X Boulenger (Mar. Inv. S. Afr. i. 1902, p. 13) writes : " Lophotes fisTcii diifers 

 very widely from the tropical form of tlie genus; its extremelj' elongate, ribbon-like 

 form and the probable absence of an anal fin, to say nothing of the frontal crest and 

 the absence of ventral fins, indicates, in nvy opinion, a distinct genus." 



