DISCUSSION OF f^PECIES AND THEIR DISTIUUUTION. 401 



imeu referred to the nakedness of the under surface of the head is even more pronounced 

 than in the smaller, in which the under surface of the head beneath the suborbital and nasal 

 ridge is almost entirely naked. The intermaxilla has a very short bone similar iu structure 

 and dentition to that of Mavrunifi Fabrieii, that is to say, the intermaxillary teetli are in a 

 rather broad villiforin band, and the outer teeth are not enlarged. The mandibulary teeth 

 are in a similar broad villiform band. The mouth is entirely inferior and small. Tlie gill 

 membranes are attached across the istiimus and are very little eniarginate and not deei)ly 

 cleft. In the large example the gill membrane is attached to the isthmus and not deeply 

 cleft, but there is a very narrow free margin behind. 



The gill rakers are very short, tubercular, and few in nunii)er, certainly not more 

 numerous than in Fabrieii. In the large example only 8 little tubercles can be seen on the 

 first gill arch. 



Second spine of the dorsal iu the type specimen is smooth, with the exception of two 

 weak spines near its tip, but iu the large example there is no trace of serrations on the 

 dorsal spine. 



The type specimen (Cat. No. 37334, U. S. N. M.), 450 millimeters in length, was taken 



by the Albatrons from station 239G, in 28° 34' N. lat., 86^ 48' W. Ion., at a depth of 335 



fathoms. 



CCELORHYNCHITS CARIBB.EUS, Goodr inul Rkax (Figure 3:!8). 



Miururiis cnribhwiis, Goode and Bean, Proc. U. S. Nat. Mus., viii, 1885, 5;)1.^0i;NTliEH, Challeugt-r Report, 

 XXII, 124, note 3. 



A Ccelorhynchus, in general appearance resembling M. carminatus, from which it uuiy 

 be quickly distinguished by its sharper and longer snout, smaller scales, more advanced 

 second dorsal, and many less prominent characters. The body is normal in shape, its greatest 

 height (44 millimeters in the type specimen) contained 64 times in its total length. Scales 

 moderate, strong, densely covered with minute spines, without enlarged median keel, as in 

 Macrurus fabrieii ; 124 in the lateral line, series between origin of dorsal arul lateral line, 

 and 15 or 16 series from vent forward to lateral line. The length of the head (67 milli- 

 meters) is contained nearly 4.J times in the total length; iuterorbital area flat, its greatest 

 width (13 millimeters) about 5 times iu the length of the head. Postorbital portion of head 

 (21 millimeters) contained about 3 times in its own length, and just as long as the eye, 

 which is oval (its horizontal diameter 21 millimeters), and 1| as long as its vertical diam- 

 eter (15 millimeters). Snout long, thin, diaphanous, with acuminate point, its general form 

 resembling that of M. edrmiiudus. Tlie nostrils are close to the orbit, the posterior ones 

 much the largest. Teeth iu both jaws iu villiform bands, minute. Itarbel slender and 

 short, its length (7 millimeters) one-third that of the eye. The maxillary extends to the ver- 

 tical through the middle of the pupil. Length of upper jaw (19 millimeters) slightly more 

 than 3 times in length of head. Length of mandible (26 millimeters) contained 2i times in 

 length of head. The intermaxillary is a short bone as compared with the maxillary. The 

 outer series of teeth iu this bone and the mandible not enlarged, and the teeth not becoming 

 uniserial. The gill-membrane is narrowly attached to the isthnuis. Gill-rakers minute, 

 tubercular, about 10 on the first arch. The suborbital ridge is very strong, and is contin- 

 ued almost in a straight line by the lateral ridge of the snout. The under surface of the 

 head, except the chin ami brau(;hiostegal region, is densely covered with small, spiny tuber- 

 cles. There is a naked space on the under surface of the snout; it occupies almost the entire 

 distance from the front of the mouth to the tip of the snout; the space is widest anteriorly, 

 but its greatest width is only about one-fifth the length of the snout. The intermaxillary 

 is protractile in a nearly vertical direction, and the mouth is distinctly inferior and not 

 lateral. 



First dorsal with 2 spines— the first minute, the second smootli, elongate— and 8 

 rays, the last doul)le, inserted at a distance from the snout (72 millinu-ters) eiiual to one- 

 fourth of the total length; the second spine (3"J millimeters long) reaching tlie fifth ray of 

 the second dorsal. The length of its base (15 millimeters) equal to three-quarters of the 

 space between the two dorsals. The secrond dorsal begins in the perpendicular from the 

 19868— No. 2 26 



