68 



One specimen, nearly four inches long, from the Gulf of Martaban 67 

 fathoms. 



Regd. No. '4-'- 



This species was taken by the Challenger in the seas of the East Indian 

 Archipelago at 140 fathoms. 



48. Lepldotrlgla spUoptera var. longiphmis, Akock. 



Lepidotrigla spUoptera, var. longipiniiis, Alcock, Ann. Mag. Nat. niat., Dec. 1890, p. 429. 



Only differs from the type in the gi-eat length of the pectoral fins, which 

 reach to, or beyond, the 9th anal ray. 



Largest specimen five inches long. 



Off Ganjam coast 18 fathoms, Gulf of Martaban 67 fathoms, Andaman Sea 

 55 fathoms, off Malabar coast 68 to 148 fathoms and 100 fathoms. 



Regd. Nos. 12925, ?i^ '-^, *-^^ '^. 



Family CfltCiphrciCti. 



Peeistethium, Lacepede. 



Diagnosis, etc , recorded iu tlie Fauna of British India, Fishes, II. p. 241. 



Key to tlie Indian species of the genus Peristethiura. 



I. Pre-oi)ercular ridge not prolonged to form a spine ... ... P. Rivers- Audersoni. 



11. Pre-operoular ridge prolonged to form a spine : — 



1. Preorbital prooesses long, narrow, spatliulate ... F. serruhitum. 

 '2. Preorbital processes short, broad, triangular: — 



i. Twenty rays in the soft dorsal ... ... P. iinvstignturis. 



ii. Fifteen rays in tlie soft dorsal ... ... P. Hahji. 



49. JPeHstethiiini Mivers- Andersoiil, Alcock. 



Pfristelhus Rivers-Andersoni, Alcock, Joarii. As. Soc. Bengal, Vol. LXIII. pt. 2, 189t, P 12- , pi. vi. figs. 2, 

 2.1, 2b. 



B. 7. D. VI. 22. A. 21. L. lat. 32. 



The length of the narrow sub-spathulate pre-orbital processes is nearly 

 equal to the distance between their base and the anterior border of the orbit : 

 each has, on the upper surface near its base, a recurved upstanding spine. 



The pre-opercular ridge is remarkably salient but is sharply truncated, not 

 forming a spine. The opercular ridge forms a short blunt spine. 



The lower jaw is thickly fringed with small tentacles. The long labial 

 tentacles when laid back hardly surpass the angle of the mouth. 



