26 DR. A. GUNTHER ON NEW AMERICAN FISHES. [Jan. 26, 
each soft dorsal ray ; these streaks form a continuous band on the 
spinous portion. Anal fin with two or three whitish lines; caudal 
with several irregular reddish longitudinal bands, which are conver- 
gent behind. 
Young specimens are much more plain-coloured ; the black spot 
on the lateral line, however, is very distinct, and there is another at 
the root of the caudal. 
Capt. Dow’s collection contains a single young specimen ; but Mr. 
Salvin has brought a second, apparently adult, it being 53 inches 
long. 
22. PsEUDOJULIS NOTOSPILUS, 0. sp. 
D. 2. 3 = L. lat. 25. LL. transv. 2, The height of the 
body is rather less than the length of the head, and contained four 
times and a quarter in the total. Dorsal spines pungent ; caudal fin 
slightly rounded. Brownish or yellowish olive; young specimens 
with a silvery band along each side of the trunk, above the pectoral 
fin. Back with four or five indistinct broad brown cross bars; a 
series of blotches on the dorsal fin corresponds to these cross bands, 
one of them, on the three first soft dorsal rays, being the largest and 
most distinct ; it is of a deep black colour, and of an ovate form. 
The corners of the caudal fin are white ; ventral whitish, with a broad 
blackish outer margin. 
One adult specimen, 4 inches long, and several young ones are in 
the collection. : 
23. JULIS LUCASANA, Gill. 
24, DINEMATICHTHYS MARGINATUS, Ayres. 
25. MicropESMUS DIPUS, n. g. et sp. Of this we have re- 
ceived only a single small example ; and as it is not in a perfect state 
of preservation, we cannot decide whether it should be referred to 
the Blennoids or Gadoids, or whether it is the type of a distinct 
family. However, we may hope that Capt. Dow will succeed in ob- 
taining more specimens. 
MicropEsMvs. 
Body much elongate, eel-like, covered with rudimentary scales ; 
head rather short, with obtuse snout, narrow cleft of the mouth, 
and prominent lower jaw. Eyes minute. Teeth in both jaws mi- 
nute ; palate toothless. The gill-opening is reduced to a small slit 
in front of the pectoral fin. Vertical fins united by a membrane, 
but the caudal can be easily distinguished from the two other fins. 
Dorsal fin very long, composed of flexible, undivided rays, like the 
anal. Pectorals short ; ventrals thoracic, each reduced to a single 
ray. Vent in the middle of the total length. 
Micropesmus pipus. (PI. III. fig. 2.) 
D.55. A. 34. C.16. P.12. V.1. The depth of the body 
