VI 116 Carl Zimmer. 



niiddle Joint small, last Joint longer and stouter tlian the preceding, niiicli longer 

 and stouter in the male tlian in the female, fnrnished in the male witli an appen- 

 dage of the usual form, bnt (in our mitcrial) devoid of the usual brush of setae. 

 Antennae with a pair of spines on the onther face of the basal Joint. Antennal 

 Scale four times as long as broad, outer margin terminating in a short stont spine, 

 ape.x obtusely truncate, not extending beyond the terminal spine. Labrmn pro- 

 duced into a blade-like process about as long as the rostral Prolongation of the 

 carapace. Mouth parfs as in the genus Amblyops, except that the mandibular 

 palp is not as setose. First thoracic legs as in Amblyops abbreviata. Second 

 thoracic legs somewhat stouter and relatively shorter than in Amblyops abbreviata, 

 with the merus a little longer than the carpus, the latter somewhat expanded 

 distally; propodus small and densely setose, nail distinct, exopod with the basal 

 Joint produced at its onter distal angle into an acute spine, the flagelliform part 

 of nine joints. The remaining thoracic legs long and slender, the tarsus shorter 

 than the merus, three-jointed, and terminated by a distinct nail; exopods of the 

 remaining thoracic legs similar to that of the second leg. Pleon longer than the 

 carapace, the first five segments sub-equal, the sixth about as long as the two 

 preceding ones taken together. 



Pleopods rudimentary in the female, all natatory and biramous in the male, 

 the inner ramus of the first pair short, non-articulate, nearly devoid of setae on 

 the distal parts; inner rami of all the pairs with a lateral basal lamina. Telson 

 very massive and strongly armed, about as long as the last Segment of the pleon, 

 apex widely truncate, its breadth equal to a quarter of the length, armed with 

 five pairs of spines, the median pair very small, the second pair from the inside 

 very little longer than the median pair and slightly serrate at their bases, the outer 

 three pairs of spines long and very stout, the median of the tliree pairs being 

 slightly the longest. Lateral margins armed with about fourteen to sixteen short 

 stout spines. Outer uropods about one-fourth longer tlian the telson. Inner 

 uropods but little shorter than the outer ones, armed inferiorly with a Single minute 

 spine at the level of the posterior end of the otolith. 



Length, about 10 iinn." (1. c.) 



Verbreitung: Die Art ist bekannt aus den irischen Gewässern (180 — 382 F.), 

 aus dem Meere südlich der Färöer (450 — 500 F. I und dem Mittelmeere (520 — 600 F.) 



Gattung Dactylaniblyops H. n. T. 



1906. Dacty lamblyops Holt n. Tattersall, Ann. nat. bist. ser. 7 v. 19, p. 8, 9. 



„Eyes small, with distinct and definite eye-stalks; more or less pyriform in 

 shajic; Visual Clements, though imperfectly formed, are better developed and more 

 numerous than in Dactylerythrops, reaching to the surface of the eye and 

 probably directly functional as organs of sight; outer distal corner ronnded and 

 not produced into a digitiform process; a short process always present on the 

 inner and upper surface." (Tattersall, Ann. nat. hist. ser. 7 v. 19, p. 112, 113.) 



