Loweina rara 



(Liitken, 1892) 



Designation and Description of Lectotype 



As stated above, Liitken's type material of Scopelus rarus consisted of four specimens. Due 

 to the kindness of Dr. Jorgen Nielsen, Universitetets Zoologiske Museum, Copenhagen, I was 

 privileged to examine these specimens. Two of them were labeled as Myctophum rarum, and 

 two as Myctophum interruptum. Accompanying each of the four specimens (each in a separate 

 vial) was aslipof paper bearing the single word "Type" printed in large bold letters. Thus, both 

 specimens of both species have been regarded as types by some investigator, but without 

 formal publication of the action. 



Therefore, I hereby designate as lectotype of Loweina rara (Fig. 67), Number 223, a female 

 (no caudal glands), 39.2 mm in standard length, deposited in the Universitetets Zoologiske 

 Museum, Copenhagen, Denmark. The label bears the following data: "Scopelus rarum (sic) 

 Ltk, 20° N.B. 48°-50° V.L., 10-9-1871, Iversen." I also designate as paralectotype of Loweina 

 rara Number 224, of the same museum, a female (no caudal glands), 36.2 mm in standard 

 length. The label bears only the following data: "Scopelus rarum (sic) Ltk. 33° N, 1863, 

 Warming. 



Fig. 67 — Loweina rara. lectotype, female, 39.2 mm. (Photophores retouched). 



In the following counts, those for the lectotype are given first and are followed by those for 

 the paralectotype, in parentheses if different. D. 11 (12); A. 16; pectoral 11-11; pelvic 8-8; AO 7 

 -I- (6 + 6); gill rakers 2-1-1 + 6. The incomplete lateral line has 6 or 7 weakly expressed pores 

 that extend to about over the end of the pectoral fin. 



Body proportions for the lectotype and paralectotype of L. rara, and lectotype of L. inter- 

 rupta, are given in Table 15 and are compared with those of L. laurae and L. terminata. 



Dentition: Teeth of upper jaw in a single row of straight, alternately long and short, 

 conical teeth that extend along entire outer margin to the slightly rounded expansion at end of 

 upper jaw. The longer teeth are from two to three times longer than shorter ones, which in turn 

 are rather typically cardiform. On the dentary, to its occlusion by the upper jaw, is a narrow 

 band of cardiform teeth 2 or 3 teeth in width. An inner band of about 15 longer, backward 

 curving, fanglike teeth extends from the symphysis to about under midorbit; posteriorly, these 

 enlarged teeth become somewhat smaller, straight, and more closely set; those near the end of 

 the gape tend to have a forward slant. 



The palatine teeth occur in a row of about 10 widely spaced fangs, curved strongly back- 

 ward, which extends continuously from the vomer heads (which bear a single fang each) to 

 about under the hind orbital margin. No small teeth are evident on either vomer heads or 

 palatines. The paralectotype has the palatines slightly damaged anteriorly, and some fangs 



78 



