3. BASCYLLUS. 13 



fin to the anal ; dorsal and anal fins black ; caudal j'ollowish at the 

 base and on the upper and lower margins, the remainder black. 

 East Indian Archipelago. 



a. Fine specimen. Molucca Sea. Purchased of Mr. Jamrach. 

 h. Half-grown. Amboyna. Purchased of Mr. Frank. 



3. Dascyllus trimaculatus. 



Pomaeentrus trimaculatus, liiipj). Atl. Fische, p. 39. taf. 8, fig. 3. 



nuchalis, Bftui. in Life of Raffles, p. 688. 



Dascyllus trimaculatus, Ctiv. ^- l\il. v. p. 441. 



unicolor, Bom. I'roc. Comm. Zool. Soc. i. p. 127. 



niger, Blevk. Vvrhind. Batav. Genootsch. xxi. Lah\ Cten. p. 10. 



Sparus nigricans, pt., (ironov. Syd. ed. Gray, p. 61. 



D.i|. A.^. L.lat.27. L. transv.3/11. Case, pylor. 3. Vert. 11/14. 



Blackish ; vertical fins with a black margin. A single white spot 

 on the nape of the neck (sometimes indistinct); another above the 

 lateral lino below the middle of the dorsal fin. The second dorsal 

 spine is shorter than the head, and not twice as long as the last. 



From the eastern coasts of Africa to the East Indian and Louisiade 

 Archipelagos. 



a. Adult. Red Sea. From Dr. lliippell's Collection. 



h. Adult: stuffed, lied Sea. From Dr. Eiippell's Collection. 



c-e. Adult and half-grown : bad state. Mauritius. Presented by 

 Vice-Admiral Sir E. Belcher, C.B. 



/. Fine specimen. Mauritius. From the Collection of the Zoological 

 Society. — Typo of Dascyllus unicolor. 



g. Adult. Mozambique. From Prof. Peters's Collection. 



h. Half-grown. Sumatra. From the Collection of the Zoological 

 Society. — Type of romacenlrus nuchalis, Benn. 



i, I: Fine specimen and young. Amboyna. Purchased of Mr. Frank. 



Z. Adult : stuffed. Louisiade Archipelago. Voyage of the ' Rattle- 

 snake.' 



m. Adult: stuffed. Aneiteum. From Mr. Macgillivray's Collection. 



n. AduJt: skin. From Gronow's Collection. 



0. Adult: skeleton. Mozambique. From Prof. Peters's Collection. 



The white lateral spot becomes nearly obsolete in dried adult spe- 

 cimens, which then appear to be uniform brown. In the typical 

 specimen of D. unicolor and in others there is no nuchal spot, and the 

 lateral spot is indistinct, although clearly indicated. 



4. Dascyllus albiseUa. 



GiU in Broc. Acad. Xat. Sc. PhiUtd. 1862, p. 149. 



D. i|. A. f^. L. lat. 27. L. transv. 5/12. 



Dark grcj-ish, with a transv(>rsc white band, descending halfway 

 down from the middle of the back below the fifth and tenth dorsal 



