380 ACANTHOPTERTGII. 



over tte opercles, just touching the posterior edge of tlie orbit : the second from the last three spines and first 

 few dorsal rays is continued downward to the middle of the body, and backward to the summit of all the dorsal 

 rays : caudal black, with a white upper and lower edge. 



It is suggested that A. mtermedius, Schlegel, is a variety of this species, differing in colour it being 

 brownish, with a curved milk-white band from the nape over the opercle and subopercle : a second from the 

 last few dorsal spines to in front of the base of the anal, it is rather produced superiorly and posteriorly: a third " 

 over the free portion of the tail. Fins brownish, edged with black, and tipped with white. In one of the two 

 specimens in the Calcutta Museum, the pectoral has a black extremity with a white edge. 



Habitat. — Andamans to the Malay Archipelago and beyond. 



7. AmpMprion akallopisus. 



Bleeker, Sumatra, ii, p. 281, and Groot Oby. p. 438 ; Giinther, Catal. iv, p. 10. 



B. V, D. ^.W. P- 19, V. 1/5, A. .^3?!^, 0. 15, L. 1. 60, L. tr. 6/24. 



Length of head 3i to 4j, of caudal 4j to 5 J, height of body 2f to 3 in the total length. Eyes — diameter 

 31 in the length of head, 1 diameter from end of snout, and also apart. All the opercles and suborbital ring of 

 bones coarsely denticulated. Mns — dorsal spines of moderate strength, short, increasing in length to the fourth, 

 a notch between the spii^ious and soft portions. Caudal rounded. Oolows — orange, brightest on the head, chest 

 and base of caudal fin : a blue band runs from between the orbit to the dorsal fin where it divides into two, half 

 going along either side of the base of the fin. Scales on body with a light spot. 



In a specimen 1'5 inches long from the Andamans the preopercle is entire. 



Habitat. — ^Andamans to the Malay Archipelago. 



Genus, 2 — ^Pbemnas, Cwo. 



BramcMostegals jive or six : pseudohramcMoe. All the opercles serrated : a long strong spine at the posterior 

 'edge of the preorhital. Teeth in a single row, conical and small. Dorsal with 9 or 10, anal with 2 spines. Scales 

 of moderate size. The lateral-line ceases below the end of the dorsal fin. An air-vessel. Pyloric appendages three. 



SYNOPSIS OF INDIVIDUAL SPECIES. 

 1. Premnas hiaculeatus, Bloch, D. -^l-fg, A. xs-TSt L. 1. 50-60. 



1. Premnas biaouleatus, Plate LXXX, fig. 5. 



Chcetodon biamdeafus, Bl. t. 219, f. 2. 



Lutjanus trifasoiatus, Bl. Schn. p. 568. 



Holacanthus biaouleatus, Lacep. iv, pp, 528, 537. 



Holocentrus Sonneratii, Lacep. iv, pp. 344, 391. 



Scorpcena aculeata, Lacep. iii, pp. 268, 268. 



Premnas trifasciatus, Cuv. and Val. v, p. 406. 



Prenmas semicinctus, Cuv. and Val. v, p. 409, pi. 133, f. 1 ; Swainson, Mshes, ii, p. 217. 



Premnas unicolor, Cuv. and Val. v, p. 410. 



Premnas biaouleatus, Bleeker, Banda, iii, p. 105 ; Giinther, Catal. iv, p. 10. 



B. V, D. Ts?ii?^, P. 19, V. 1/5, A. Ty2^, C. 15, L. 1. 60-70, L. tr. 14/35, Csec. pyl. 3, Vert. 12/14. 



Length of head 4, caudal 4|, height of body 2f in the total length. i?2/es— diameter a little above ' 

 61 to 4 in length of head, 1 to If diameters from end of snout, and 1 apart. Preorbital armed with two 

 l^^^xv^T^' '"^^ , ^ commences opposite the anterior third of the orbit, the largest below its posterior 

 third, the longest reaches the opercle. Preopercle rounded, its vertical border serrated, as is also the lower 

 edge of the subopercle. J-ms— fourth dorsal spine longest, and jbhe second of the anal. Lat^al-line-ceases in 

 a tubular form opposite the third dorsal ray. Colours— bia^dk or chestnut-brown, fins edged with black. A 

 broad^ite band margined with black passes over the occiput and on to the opercles and subopercle: a 



■ cauXl ' '^™^^ *° ™ ^°''^ °^ *^^ ^^^^ °^ *^^ ^^^ '• ^ ^^^ "^^"^ *^^ ^^^ ^°'^^'' °^ *^^ ' 



This fish is said to use AdimicB as a hiding place (De Cresp. Proc. Zool. Soc. 1869, p. 248). 

 Schle eTtndDrXbreSrof Lfdef"* '' ^"^"^ *^« ^^% -^''''l^Pel^go. ^^^ ^^ i* I am indebted to Professor 

 Habitat.— Se&a of India to the Malay Archipelago, and beyond. 



T, „ » ^ Genus, 3 — Teteadeachmum, Cantor. 



JJascyllus,* Cuv. 



_ BroMcUostegalsfim: pseudolranehice. Preopercle, ami occasionally the preorbital are serrated. Teeth villi, 

 form^n a narrow band the ouer being somewhat the larger. Dorsal with 12 or 13, anal with 2 spines. Scales large 

 or of moderate size. _ Lateral-hne ceases m a tubulwr form below the soft dorsal, but is continued along the central 

 row of scales as a circular hole m each. Air-vessel large. Pyloric appendages two or three. 



* Preoccupied by Latreille (1796), Coleoptera. 



