586 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



Gaiiiiliceps tniiiohi Wooil-Muson, from t\w Hay »( Bcnjial, lla^^ l>eeii xubpfciueiitly n-lVrroil by 

 Alcock to the genus .W'tluxliinia. But as the posterior nostril is "situated hUerally nearly midway 

 between the eye and the tip (jf the snont," the gill-openings are "of moderate si/.e, almost meeting in 

 the mid-ventral line;" there is present a fleshy tongue, and the mandible and vomer are abruptly 

 expanded at tip, the species wouM seem to belong to a genus distin<-t from Netlaslonia, for whieh the 

 name (lurinficeps nmst be retained. (iiii'liiUceps Wood-Mason, firstappears in a paper by Aleock "On 

 the Bathybial Fishes of the Bay of Bengal" in Ann. i\Iag. Nat. Hist, ((i) vol. A. bssd, p. 4tiO. Two 

 species are descril)ed: (r. t:e)ni>la Wood-Mas<in and (1. iiiii-rD/iii Aleock. There can be no doubt that 

 a. ttvniola must he. considered the type of tlie genus, and this would become a synonym of Xittasloma 

 if Alcock's later view's are correct, and the characters indicated above are not of sutiicient importance 

 to warrant generic .sejiaration. The immature types of O. tunioln are said to have no pe<'toral tins. 

 In later jiapers, in desiTibing the adults of (L Umiohiy Alcock neglects to call attention to the presence 

 of pectoral tins, though their presence would be inferred from his reference of the species to XtUnsloniu. 

 If they were absent in the types of the species, but were i>resent in the a(hdt specimens subseipiently 

 acipiiri'il, an eiror must have l)een made in the identilication of the adults, as jjcctorals are present 

 even in the larval stages of eels wdiicli possess |:>eclorals in tile adult condition. 



For the iiendchthyoiil genus, witliout pectoral tins, typilied by (lari<ilic('/is )n'icmjis, to which Alcock 

 erroneously restricts the genus < lurialii-i'px, I wonlil pro]iosi' the name Aliwkiilin, in honor of its 

 distinguished discoverer. 



Family XEMICHTHYID^:. 



Serrivomer beanii < 111! i*c liydcr. 



Three spe<'imens were olitaincil. whiih I am unable to distinguish from ( iarman's figure and 

 description of .S'. sector fiom the Pacific coast of Mexico and t!entral America, (iarnian fails to point 

 out any characters l)y which .s'. srcliir differs from S. heanii of the Atlantic. S. hi'nnii has received no 

 description beyond a few trivial remarks, but the figure of the type jireaented by Goode and Bean 

 (Oceanic L'hthyoiogy, lS9li, fig. 17;i) agrees so chisely with the Pacific form that I do not venture to 

 sei)arate tliem. Differences may appear when it is possiljle to compare material from the various 

 localities. 



The specimens were taken at the following stations: o9U), off the south coast of Oalui, :ill to .V.'i' 

 fathoms; 41.")7, vicinity of Bird Island. 7l>L' to l,OlK) fathoms; 418,'?, vicinity of Kauai, tt.JT to I,0li7 

 fathoms. 



Stemonidium, new genus. 



Intej-nieiliate in ne respe<'ts between the groups typilied by Xfiiiichtlii/s and Sfrrimtnn; having 

 the dentition of the former, and the short straight jaws, small eyes, long postorbital region, and widi', 

 [lartly confiuent gill-openings of the latter; it agrees with Sn-riromer also in the position of the nostrils 

 and the ab.sence of the lateral line pores. Tlie pectorals are reduced in size, w ith fi'w rays, and are 

 very sU'uder. The lioisal originates behind the occiput a ilistance ei[ual to half the length of the 

 head, and the vent is remote from the head. Not closely related to any known genus, but nearer 

 sSerririiiiii r than \iinii-lillii/s, in spite of its reduced dentition. 



stnnmii'lfinii (iillicrl. new ,y:t'Tiiis ot Ntttiirlithiiiit-j' ihifi>nm/ltis}. 



Stemonidium hypomelas, new species. Plate (i7. 



Type, 171 nun. long, from station 4I7ti. vicinity of Xiihau Island, depth r).'i7 to ()72 fathoms; type. 

 No. ."Sl.WO, U. S. Nat. Mus. 



Head 17 lunidredths of the total length; distance from tip of snout to front of anal 2(5; fi-om tip ol 

 snout to front of dorsal 25; from tip of snout to front of eye 8; diameter of eye I; length of pectoral 

 1.'); gri'atest dei>th of body li; interorbital width two-thirds diameter of eye. 



Body narrowly band-sha]ied, of nt^arly uniform depth in its middle half, tapering to tli<' narrower 

 neck, and rather I'apidly to the pointed but short and not filamentous tail; eye very small, in the mi< Idle 

 of length of head, one-eighth the postorbital leiiL'th of head, a little longer than interorbital width; 

 head and beak shaped umch as in Serrii'diiier; np|ier prolile descending in a straight line from occiput 



