intermedial scutes (scutella). Praenuchal 

 plate wanting; therefore between occiput 

 and first ring an unprotected surface of 

 skin. Two nuchal plates present; oper- 

 culum without keel. 



Distribution that of the single species 

 known. 



i. Syngnathoides biaculeatus (Bl.). 

 [Fig. 1 8, p. 40]. 



Syngnathus biaculeatus Bloch, Auslftndische Fische I. 



1875, p. 10. 



Syngnathus tetragonus Thunberg, Beskrifn. pa Syn- 

 gnathus tetragomis^ en obekandt fisk ifran Java in: 



Physiogr. Selsk. Handlgr. Lund, I, 4. 1776 1786, 



p. 301 i). 



Syngnathus tetragonus Linne-Gmelin, I. 1788, p. 1453. 

 Syngnathus biaculeattis Bloch, Schneider, Syst. Ichth. 



1801, p. 514. 

 Syngnathiis biaculeatus Cantor, Journ. Asiat. Soc. 



Bengal, XVIII. 1850, p. 1369. 

 Syngnathoides blochii Bleeker, Nat. Tijdschr. Ned. Indie 



II. 1851, p. 231 and 259. 

 Solegnathus blochii Bleeker, Verhand. Batav. Ge- 



nootsch. XXV. 1853, Bijdr. Kennis Troskieuwige 



Visschen, p. 13, 24. 

 Gastrotokeus biaculeatus Peters, Ubers. d. in Mossam- 



bique beobachteten Fische, Arch. f. Naturgesch. 



I. 1855, p. 277. Ubers. d. in Mossambique beo- 



bacht. Seefische, Sitzber. Akad. Berlin, 1855^.465. 

 Gastrotoketts biacideatus Kaup, Cat. Lophobr. Fish, 



1856, p. 19. 



i) THUNBERG'S article was published as N. 30 in. 

 the first volume of the Physiograph. Selsk. HAND- 

 LINGAR which was edited between 1776 and 1786. 

 Prof. E. LONNBERG of Stockholm was kind enough 

 to inform us, that part 4 of the first volume contained 

 the articles 28 33 and was ready May 1786. It is 

 therefore probable, that THUNBERG'S article (N. 30) 

 appeared already in 1785 or even earlier and that 

 therefore his name S. tetragomis is prior to S. biacu- 

 leatus of Bloch, as one is inclined to suppose in 

 accordance with the nomenclature and synonymy of 

 Linne-Gmelin. But this can not be proved as, according 

 to the kind information of the present secretary of 

 Fig. 1 8. Syngnathoides the Physiographic Society of Lund, the "Protocols" 

 biaculeatits (Bl.). of the Society contain nothing about the article 



Male with eggs n. s. of THUNBERG. 



