NO. 1308. HEMIBRANCHIATE FISHES— JORDAN AND STARKS. 71 



abdominal. Teeth none. Parietals absent. Posttemporal .suturally 

 connected to cranium; supraclavicle present. Ribs developed. Post- 

 clavicles present. East Indies. Species few and small, fantastically 

 formed, the translucent carapace suggesting that of a shrimp. 



7. v^OLISCUS Jordan and Starks, new genus (strigatus). 



This genus diti'ers from Centriscus Linnaeus {AmphisUe Cuvier),** 

 chiefly in having the iirst dorsal spine borne by the spine which termi- 

 nates the cuirass. The dorsal cuirass of Centriscus ends posteriorly 

 in a long unjointed spine. This genus ^EoUscus includes also ^olis- 

 cus imnctulatus (Bianconi) and perhaps also the fossil species called 

 Amphls'ile heinrlvli i. 



(aioXog, moving.) 



lo. yEOLISCUS STRIGATUS (Gunther). 



Amphmle strigala Guntiier, Cat. Fish., Ill, 1861, p. 28; Java. 



Head 2^ in length to base of soft dorsal rays; depth 3 in head; orbit 

 11 or 13 in head; ]tito2in postorlntal part of head; interorbital f 

 orbit. Dorsal III, 10; anal 12. 



Fig. 3.— ^oliscus strigatus. 



Bod}^ very much compressed and rather elongate, resembling in 

 transverse section a razor blade — thin and rounded above, tapering 

 below to an extremely thin drawn out cutting* edge. Head and body 

 cuirassed with smooth, bony plates; tapering anteriorly into a long 

 bony snout; terminating posteriorly in a long spine. 



Outline of head concave above from occiput to tip of snout; the 

 rostral tube bent upward anteriorly and terminating- in an extremely 

 small toothless mouth. The length of the mandible is less than half 

 the diameter of the eye. The interorbital is co«nvex and longitudinally 

 striated; its width is equal to the diameter of the eye. The supraor- 

 bital margin of the eye is a projecting rim. 



The third lateral plate of the body is nearly twice as long as deep; 

 its lower edge is midway l)etween the outline of the V)ack al)ove it and 

 the base of the ventral tin. There are 11 lower ventral plates (ribs), 2 

 in front of the pectoral and 9 behind. 



" The name Cenlrucus Linnaeus, was based on Cenlrlscux scutatus alone, described 

 after Gronow. It is therefore equivalent to Amphmle of Cuvier and .■l'r))/;v/r////u'iof 

 Gill, and can be used neither for Macrorhamphosun nor for ^Eoliscus. 



