204 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Remarks: The species has been refigured and redescribed by Gra- 

 vier, who also points out significant differences between it and the closely 

 allied C. trachura (von Martens) from the Indo-Pacific. Through the 

 kindness of Dr. Louis Fage, of the Paris Museum, a female specimen 

 from off Tagus Cove was compared with Milne-Edwards' type and 

 found to be specifically identical. 



In view of the notable extension of range, in fact, unexpected occur- 

 rence of the species in Pacific waters, I have undertaken to contribute a 

 few descriptive remarks on the largest female specimen : 



Carapace smooth; gastric grooves well marked; at the end of proxi- 

 mal fifth of length of carapace the gastric grooves are slightly drawn to- 

 gether a little in advance of the faint indication of the cervical groove 

 which does not, however, cross the middorsum of the carapace. Rostral 

 plate subrectangular, about 1% times as wide as long on median line, 

 with small median, subacute, triangular projection. Our specimens differ 

 from Gravier's in the distance between the cornea and the anterior mar- 

 gin of the rostral plate. In the Galapagos specimens the distance from the 

 inner angle of the cornea to the anterior margin of the plate equals the 

 distance from the anterior to the posterior margin of the plate. 



The anterolateral angles of the carapace are more rounded off than 

 angled; anterior width of carapace a little more than half its median 

 length including rostrum ; greatest width almost equals length including 

 rostrum. In the accompanying figure the carapace has been drawn a bit 

 too narrow. In the type the antennal peduncles reach about as far forward 

 as the corneae; second segment of peduncle armed with a small acute 

 spine at the anterointernal angle; antennal scale short, reaching about 

 as far as the antennal peduncle and the corneae or slightly more. The 

 cornea sits obliquely on the eyestalk and in thickness measures about ^ 

 the visible portion of the longitudinal axis of the stalk — the eyestalks as 

 drawn appear too slender ; of the visible portion the width at the middle 

 of the length is about half or slightly more than half the median length 

 of the stalk with the cornea included ; the transverse axis, width of the 

 cornea about equals the visible portion of the longitudinal axis of the 

 stalk. 



The margin of the propodus opposed to the raptorial dactylus is pecti- 

 nate for the greater part of its length, at its base the usual 3 movable 

 spines are found ; the dactyl is armed with 4 spines including the terminal 

 one, outer margin of the inflated base scarcely or almost imperceptibly 

 notched, before notch the dactyl is inflated much as in Gonodactylus. The 



