354 ACRONTTRID-a;. 



? Aspisurus carolinarum, Quoy S^- Gaim. Voy. Uran. Zool. p. 375. pi. 63. 



fig. 1. 

 Prionurus eoiime, Less. Voy. Coq. Zool. ii. p. 151. 

 Naseus lituratus, Cur. 8f Val. x. p. 282 ; Sleek. Celeb, iii. p. 763. 

 ? Naseus carolinarum, Ctiv. ^ Val. x. p. 287. 

 Aspisurus lituratus, Iliipp. N. W. Fkche, p. 130. 



D-i^- A. 3-^,. C^c.pylor.8. Vert. 9/13. 



Forehead without horn. Snout rather produced. Teeth com- 

 pressed, of moderate size, thirteen or fifteen on each side of the upper 

 jaw. Dorsal spines strong and stout, the length of the fifth being 

 less than its distance from the fii'st. Brown : end of the tail white ; 

 a green streak commences at the eye and nostiil, and descends in a 

 cui-ve to the angle of the mouth. Back with a blue liae along the 

 base of the dorsal fin ; dorsal fin black, with a broad whitish margin, 

 and with a white band running near and along the edge of the black 

 colour. Caudal with a green and white margin posteriorly ; anal 

 with a narrow black and white margin. 



From the Red Sea to Polynesia. 



a-c. Adult. Otaheiti. From Forster's Collection. — Tj^es of the 



species. 

 d-e. Adult and half-grown : stuffed. Aneiteum. From Mr. Mac- 



gUlivray's Collection. 

 /. Fine specimen. Malayan Archipelago. Presented by Sir J. 



Richardson. 

 g. Adult : stuffed. Red Sea. From Dr. Riippell's Collection. 

 Ji. Fine specimen. From the Haslar Collection. 

 {. Adult : skeleton. From the Haslar Collection. 



The skeleton does not differ essentially from that of N. brevirosfris. 

 The teeth being somewhat stronger in this species, the bones of the 

 jaws are rather thicker and stouter. The piincipal frontal bones do 

 not extend forwards beyond the level of the orbit ; the prasfrontals 

 occupy, as usual, the front part of the orbit ; the tui'biaal bones 

 are well ossified, and situated immediately behind the maxillary : 

 the space on each side of the upper surface of the snout, between the 

 principal frontal, prseorbital and turbinal, is occupied by a long bone, 

 which may be considered as the separate anterior portion of the prin- 

 cipal frontal; a narrow strip of the ethmoid intervenes between 

 these two peculiar bones, but as it does not extend so far backwards 

 as they do, an oblong free space remains, leading into the interior of 

 the cavity of the skull. 



lines. 



Length of the first vertebra 0^ 



of the second vertebra l| 



of the third vertebra 1| 



of the fourth vertebra 2^ 



of the tenth vertebra 3 



of the fourteenth vertebra 3^ 



of the seventeenth vertebra 3| 



of the nineteenth vertebra 3 



of the twenty-first vertebra 2 



