512 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
the scales of the median rostral ridge are in rows radiating from 
near front of scale; the lower half of the nasal fossa is scaled. 
Second dorsal, proximal part of first dorsal, and pectorals light. 
Traces of vertical bars can be seen on the small specimen from 
station 5587. 
Table of measurements of paratypes in hundredths of length to anus. 
Albatross Staion se ae sen tonne cle ae ealeinie aces eisisaie lle sterecie a 5111 5111 5111 5111 
Totallenet hmm ee eee eit ee ae eter ate atte to aletetelralnate ie 1 187, 1213 1 202 1150 
Diciera Moline Aphis mbilSee E> ssonscrodsonsconasdeesdcoseecoddoase 82 88 80 66 
engih of heady scse et eee ct ease cae wiceeeh pen eee ere cece 82 83 83 82 
Tenethiot Onpitisic cases ee ae isa ececclem ee cee tet tastietercter = 18 18 18 18 
Postorbital length of head....... n aaistheciow isle Nees c hie soe ne 23.5 24 24 23 
Widthiofinterorbital coer cose. 2 -ceee eee aes et eee cen emeneeereae 14 14 13.5 14 
Widthrof suborbital. Soe. secson- esas see Soe se ae esos 7.5 8 7.5 8 
Orbit to'preoperclesscsose o <2 ban coe teehee meess ie eeaeees 26 26 24 
Length of snout.........-.. SuSE nite emian ce in oe tones mee 41.5 41 41 
Length oftupperjawis «scsi tanteieee nacile Secale a ciamecise sleet - 18.5 18 18 
Depthior Pod yrs se seccsc ce te sioseersete sees ae Oe sscaecee y 32 32 29 
Widthofibody= ss: . 2 seen. ns ee a ep Se eee 27 25 25 
Anus to Ventral... .\scc0cmecien come cee nos re bee ls jae caspeeciwacaste 18 16 17 
Ventralitonisthmuszerecasso=c nec seers seca naoeeaee eee eee ee 21 20.5 18 
Tenethiof first dorsal basesse =. ss seo. seeneece-eecc 10 10 ll 
Length of interdorsal space... 17.5 17 16 
Length of pectoral.. : 26 25 25 
Length of outer v entral ray 24 23 26 
Length of second ventral ray 14 14e? Ses wtemrers 
1 Pseudocaudal developed. 
(macrorhynchus, in reference to the long snout.) 
41. COELORHYNCHUS ACUTIROSTRIS Smith and Radcliffe. 
Coelorhynchus acutirostris SMirH and RapcuiFFE, Proc. U. 8. Nat. Mus., 
vol. 43, 1912, p. 134, pl. 30, fig. 2, text figure 10. 
This small species is one of the most distinct in the genus; its 
position in the subgenera into which we have divided Coelorhynchus 
is quite uncertain. The divergence of the spinous carinae on the 
scales, together with other characters shared in common with the 
species having that type of squamation, have influenced us to place 
it in the subgenus Oxwymacrurus. In the quincunx arrangement of 
the spinules on the scales of the head and the bluntness of the sub- 
opercular flap the species bears some resemblance to those of the 
subgenus Quincuncia. Its close resemblance to C. (Paramacrurus) 
gladius of the Hawaiian fauna may indicate a close relationship 
with that species, as Radcliffe has already pointed out. It resembles 
C’. gladius in the excessively long, pointed snout; in the two ventral 
fossae, one before the anus, the other before the ventral fins, and in 
the squamation of the head. In addition to the details enumerated 
by Radcliffe, C. acutirostris differs,from C. gladius in having the 
spinules on the scales of the head arranged in quincunx order; the 
spinous carinae of the body scales decidedly divergent instead of 
parallel; in the lower first dorsal fin; and further in certain details 
of proportions, as indicated in the tables of measurements, and in 
certain other details mentioned in the following description of this 
species. 
