I03 



vated ; its middle about above the anus ; caudal small. Eggs 

 numerous, isolated in cutaneous cells on the tail, enclosed in 

 a complete brood-pouch beginning behind anus and formed 

 by lateral cutaneous folds containing more or less developed 

 osseous plates. 



Distribution: Two species known from Red Sea, Ceylon, 

 Andamans, New Guinea, Australia, Torres Straits, Philip- 

 pines, Japan. 



In sea, in deeper water near shore. 



Key to the indo-australian species of 

 Halicampus. 



a. 17 — 18 trunk rings; snout with a median series of 



2 — 3 spines in its basal half , H. koilovialodon p. 103. 



b. 14 trunk rings; snout with a single spine before 



the eyes H. clegans'^. 104. 



I. Halicampus koilomatodon (Blkr.) [Fig. 43, p. 102]. 



Halicampus conspicillatns Kaup, Cat. Lophobr. Fish, 1856, p. 22 (nee 5i7/^''«rt//^«J 



coiispicillatus Jenyns 1842')). 

 Syngnathus koilomatodon Bleaker, Act. Soc. Sc. Indo-Neerl. V. 1858 — 1859, 



Vijfde Bijdr. Ichth. fauna Japan, p. 10. 

 Halicampus Grayi Dunieril, Hist. nat. Poissons II. 1870, p. 536. 

 Halicampus koilomatodon Dumeril, 1. c. p. 537. 

 Syngnathus grayi Giinther, Cat. Brit. Mus. VIII. 1870, p. 169. 

 Syngnathus Grayii Macleay, Descr. Cat. Austr. Fishes II. 1881, p. 225 (separ. edit.). 

 Syngnathus trachypoma Giinther, Rep. Zool. Coll. Voy. "Alert" 1884, p. 30. 

 Halicampus koilomatodon Jordan & Snyder, Proc. U. S. Nat. Mus. Wash. XXIV. 



1901, p. 10. 

 Corythroichthys trachypoma Jordan \ Scale, Bull. Bur. of Fisheries Wash. XXV. 



(1905) 1906, p. 214 (name only). 

 Halicampus Grayi Duncker, Fauna Siidwest Australiens II. 1909, Pisces, p. 246. 

 Trachyrhamphus caba Scale, Philipp. Journ. of Sci. IV. 1909, p. 503. 

 Halicampus koilomatodon Duncker, Mitt. a. d. naturh. Mus. Flamburg XXXII. 



1915, p. III. 



D. 19—22; A. 3—5; p. 16—19; C. 10; Rings 17—184-33—36; 

 subdorsal rings 2 — 3-fi — 3. 



l) Duncker. prefers the specific name koilomatodon Bleeker 1859 and not 

 Halicampus conspicillatus Kp. 1856 on the following grounds: "Kaup zitiert 

 (1. c.) als Synonyme " Syngnathus conspicillatus Jenyns" and einen von ihm 

 selbst im Mus. Brit, angewandten Ms.-Namen "-Halicampus Grayi."" Da er 

 jedoch in seine Beschreibung von Halicampus conspicillatus auch Jenyns' Diag- 

 nose von Corythoichthys conspicillatus mit einbezieht, betrachte ich Bleeker's 

 Bezeichnung Syngnathus koilomatodon als erste eindeutige der vorliegenden Art," 

 We follow the opinion of Duncker. 



