14 THE VOYAGE OF H.M.S. CHALLENGER. 
PACIFIC REGION. 
Two hundred and forty-eight species of True Corals, representing fifty-eight genera, 
and five species of Hydrocorals, were collected in this region at the following districts :-— 
1. Tongatabu. 6. Amboina. 
2. Fiji Islands (chiefly at Kandavu and Levuka). 7. Ternate. ; 
3. Api, New Hebrides. 8. Mactan Island, Philippines. 
4. Australia (chiefly at Somerset, Cape York, and 9. Samboangan, Philippines. 
Wednesday Island.) 10. Honolulu. 
5. Banda. 11. Tahiti. 
One species, Rhodopsammia parallela, Semper, was also obtained in the Arafura Sea, 
at a depth of 49 fathoms. 
1. TONGATABU. 
The following ten species, representing nine genera, were obtained :— 
Stylophora prostrata, K1z. Pavona divaricata, Lamk. 
Pocillopora suffruticosa, Vevrill. Psammocora obtusangula, Lamk. 
Celoria leptoticha, K1z. Turbinaria brassica, Dana. 
Caulastrea distorta, Dana. Madrepora pocillifera, Lamk. 
Pavonia crassa, Dana. Porites arenosa, Esper. 
The genera Stylophora, Pocillopora, Celoria, Caulastrea, and Turbinaria are for 
the first time recorded from this locality, while the following six species are additions to 
the fauna :— 
Stylophora prostrata. Caulastrxa distorta. 
Pocillopora suffruticosa. Pavonia crassa. 
Caloria leptoticha. Turbinaria brassica. 
Porites wrenosa. 
The following is a list of the Corals which are now known to occur at Tongatabu 
2 
comprising twenty-six species :— 
Stylophora prostrata, Kz. Acanthastrea spinosa, Edw. and H. 
Pocillopora suffruticosa, Verrill. Prionastrea fusco-viridis, Quoy and 
Celoria leptoticha, Kz. Gaim. 
Leptoria tenuis, Dana. be obtusata, Edw. and H. 
Caulastrea distorta, Dana. Orbicella solidior, Edw. and H. 
Astrexa dane, Edw. and H. Goniastrea quoyi, Edw. and H. 
Astrea amicorum, Edw. and H. Cycloseris tenuis, Dana. 
