3. DASCYI^LtrS. 13 



fin to the anal ; dorsal and anal fins black ; caudal yellowish 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. 



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



3. Dascyllus trimaculatus. 



Pomacentrus trimaculatus, Riipp. Atl. Fische, p. 39. taf. 8. fig. 3. 



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



Dascyllus trimaculatus, Cuv. 6f Val. v. p. 441. 



unicolor, Benn. Proc. Comm. Zonl. Soc. i. p. 127. 



niger, Bleek. Verhand. Batav. Genootsch. xxi. Labr. Cten. p. 10, 



Sparus nigricans, pt., Grnnav. Syst. ed. Gray, p. 61 . 



D.l|. A.^. L.lat.27. L. transv. 3/11. Caec. 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 line 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 Louisiadc 

 Archipelagos. 



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



h. Adult : stuffed. Eed Sea. From Dr. RiippeU'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. — Type of Dascyllus unicolor. 



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



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

 Society. — Type of Pomacentrus nuchalis, Bonn. 



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



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

 snake.' 



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



n. Adult: 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 albisella. 



GiU in Proc. Acad. Nat. Sc. Philad. 1862, p. 149. 



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



Dark greyish, with a transverse white band, descending halfway 

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



