No endemisim is indicated between specimens from Guadalupe Island and the adjacent 

 group, 27°-21° N. In general, specimens from the central group (06°-01° N) have slightly higher 

 counts than do those from Guadalupe Island and from 27°-21° N (Table 15). This tendency 

 toward higher counts in southern specimens is supported in counts for the southernmost group 

 (17°-29° S) only in numbers of dorsal and anal fin rays; the counts are near the upper limits 

 found for the more northern groups. The numbers of total gill rakers in the southernmost 

 group shown an interesting reduction of two rakers below the combined count for the northern 

 groups. 



No significant differences in body proportions were demonstrated between specimens from 

 the four areas. These data are combined for all areas (Table 16) and are compared with similar 

 data for Loiveina rara, L. interrupta, and L. terminata. 



The five specimens (four collections) comprising the southernmost group of L. laurae 

 (17°-29° S, Fig. 66) show a very significant reduction in numbers of pores in the lateral line 

 (Table 14). The more northern groups average 12 (7-17) pores, 149 sides counted, but the five 

 southernmost specimens ( 10 sides) average about 3 (2-6) pores; in other respects, excepting the 

 reduced numbers of gill rakers, these specimens are indistinguishable from those farther 

 north. These very low counts appear valid, as there is no indication of damage to the anterior 

 portions of the lateral line sufficient to have eradicated the pore structures. Becker (1964a, p. 

 19) reported 2 (2-4) developed pores in the lateral line of L. terminata (see above); this species 

 is primarily distinguished from L. laurae by having 3 SAO rather than 2. 



Table 16. Body Proportions for the Four Species of the Genus Loweina 



Measurement 



L. laurae 

 Eastern Pacific Becker (1964a) 



N= 15 

 (24.4-26.1 mm) 



N = 9 

 (20.6-32.5 mm) 



Ave. 



Range 



Ave. 



Range 



L. rara 



L. inter- L. terminata 



Lecto- 

 type 



(39.2 

 mm) 



rupta 



Paralecto- Lecto- 



type type 



(36.2 

 mm) 



(37.2 

 mm) 



Becker (1964a)* 

 Holo- Para- 

 type types 



N= 10 

 (28.0 (23.7-29.5 

 mm) mm) 



Head length 290 273-307** 292 265-319 255 257 259 286 249-289 



Head depth 181 168-197** — — 186 188 185 — — 



Snout length 50 47-57 — — 38 44 45 — — 



Orbit length 80 71-88 ** — — 66 69 79 — — 



Interorbital width 78 71-83 — — 71 69 79 — — 



Upper jaw length 171 159-189** — — 163 163 1.59 — — 



Dorsal origin to anal origin 219 203-253 — — 222 229 217 — — 



Dorsal origin to pelvic origin 241 217-264 — — 255 260 238 — — 



Prepectoral length 280 265-299** 287 259-301 260 257 259 268 253-293 



Prepelvic length 424 406-437 431 410-442 421 428 418 411 398-464 



Predorsal length 536 510-562 539 512-571 548 552 532 542 524-577 



Preanal length 604 590-618 606 593-623 621 625 611 619 579-621 



Preadipose length 827 803-845 811 753-837 829 842 799 819 770-828 



Greatest body depth 213 201-226 217 199-256 219 243 212 196 186-227 



Caudal peduncle length 222 192-229** 215 208-221 182 184 222 196 172-200 



Caudal peduncle depth 79 58-88 77 65-89 64 69 63 79 59-80 



Dorsal base length 147 125-171 142 134-151 149 153 135 140 132-155 



Anal base length 209 182-224 203 186-218 193 209 191 207 200-235 



Pectoral fin length 139 122-156 137 126-144 126 127 108 146 132-157 



Pelvic fin length 127 115-142 — — 115 119 106 — — 



Supracaudal gland length 126 105-137 _ _ _ _ 106 — — 



*Becker indicated that all specimens were males. 

 **From 31 to 33 specimens of L. laurae were measured for characters marked by a double asterisk. 



75 



