PART 1 GARTH : PACIFIC OXYRHYNCHA 383 



these species merge one into the other. With respect to the rostrum, for 

 example, the situation is the reverse of that which would occur were the 

 two species but one: the T. tumldus of Peru has a longer rostrum than 

 that of the T. cristulipes from the Gulf of California, while the T. 

 cristulipes of the Bay of Panama has short rostral horns. Furthermore, 

 the rostral horns of T. cristulipes, whether long or short, are widely 

 separated, whereas those of T. tumidus are closely approximated. Again, 

 while Galapagos and Gorgona Island specimens may exhibit a lateral 

 propodal tubercle, it is never elongated into a crest, as in Peruvian T. 

 tumidus. 



With the extension of range of Teleophrys cristulipes southward to 

 La Plata Island, Ecuador, by the Askoy (Garth, 1948), and the discov- 

 ery of T. tumidus at Zorritos Light, Peru, by the Velero III, it becomes 

 possible to define the ranges of the two species more precisely. While 

 individuals of either species from Santa Elena Bay, Ecuador, are still 

 lacking, it may be said that all specimens examined from north of Punta 

 Santa Elena are T. cristulipes, while all from south of this promontory 

 are T. tumidus, with no mixed populations. 



Teleophrys tumidus (Cano) 

 Plate W, Fig. 2; Plate 42, Fig. 4 



Mitraculus tumidus Cano, 1889, p. 186, pi. 7, fig. 7. 



Teleophrys cristulipes, Rathbun, 1910, p. 536 (part: not the San Lucas 



locality nor pi. 46, fig. 2). (Not T. cristulipes Stimpson). 

 Mithrax tumidus, Rathbun, 1910, p. 575. 



Teleophrys tumidus, Rathbun, 1925, p. 442, pi. 159, figs. 8, 9, text-fig. 

 128 (part: not the Galapagos specimen). Not T. tumidus Boone, 

 1927, p. 166, fig. 53. 



Type: Male holotype, length 13 mm, width 14 mm; originally in 

 Naples Museum, believed no longer extant. 



Type locality: Payta, Peru; collected by the Vettor Pisani. 



Localities subsequently reported, with collectors: Peru: Sechura Bay, 

 half way between Bayovar and Matacaballa, 5-6 fathoms, R. E. Coker 

 (Rathbun, 1910, as Teleophrys cristulipes) ; Payta, Hassler (Rathbun, 

 1925). 



Atlantic analogue: None; a Peruvian endemic species. 



Diagnosis: Second free antennal segment short and broad. Front 

 elongated, rostral horns closely approximated. Anterior branchial region 

 not prominent or crowded forward toward hepatic region. Propodus 



