6; 



Description. — Closely allied to E. teiuiis G. (). S., but the body is more clumsy, 

 and it is sharply distinguished by the eyes and the antennal squama. The carapace is produced 

 into a conspicuously protruding, somewhat narrow, triangular frontal plate (fig. 4^;), the end of 

 which is narrowly rounded. The eyes are thicker than in E. tenuis^ the triangular postero-lateral 

 area with functional facets is very much larger than in the latter species, so that the interval 

 between the anterior and the postero-lateral part of the eye is much shorter than in E. tamis. 

 The squama (fig. 4(5) is shorter and broader than in E. tenuis, only three and a half times 

 as long as broad ; its outer margin is straight, convex near the base ; the marginal denticle is 

 well developed, the terminal lobe only a little broader than long. The telson (figs. \d and \e) 

 as long as broad, its truncate end very short, only one-fifth as long as the breadth of the 

 telson, with a single pair of very oblique, slender spines at the angles and a pair of small 

 protuberances somewhat removed from each other (from which probably a pair of setae broken 

 off in the specimen originate). 



Length of the immature specimen 5.8 mm. 



Remarks. — E. oculata is besides closely allied to E. glyphidophthaluiica Illig, but 

 according to Illig's preliminary description and figures the latter species has the posterior 

 margin of the telson much longer than that in E. oculata, and the two areas of each eyes are 

 larger, separated only by "a well developed impression". 



Gymnerythrops n. gen. 



Description. — This diagnosis is incomplete because only three immature females 

 are to hand. The cephalothorax is unusually long, much longer than the abdomen, and increases 

 gradually and very considerably in depth and breadth from the base of the maxillipeds to a 

 point somewhat behind the origin of the last pair of thoracic legs, and the last thoracic segment 

 is below about twice as long as the sum of the six other thoracic segments, with the result 

 that the lower margin of the thorax is very arched and a very considerable portion of the 

 lateral surface of the cephalothorax from the maxillee to the beginning of the abdomen is left 

 uncovered below the lower margin of the carapace. The carapace covers dorsally the thorax 

 excepting a short posterior part and laterally sometimes the first and a part of the second 

 abdominal segment ; anteriorly (fig- 5 1^) it has a long and very broad frontal plate furnished 

 with a rostral process, while its antero-lateral corners are produced into conspicuous processes. 

 Eyes well developed. The antennular peduncles somewhat long and strong, with a spiniform 

 process from the upper and a similar one from the lower terminal margin at the base of the 

 flagella ; the outer flagellum long and well developed, the inner short and thin (fig. 5^). Antennae 

 without squama (fig. 5 c). Mandibles with the incisive part well developed with some triangular, 

 sharp teeth (fig. 5^), the movable lobe well developed on the left mandible (also on the right r), 

 while setae and molar process are completely wanting; palp with the second joint somewhat 

 long and very slender (fig. 5^^). (The dissection of the following mouth-parts failed; maxillulae 

 were not found and the maxillae, which are extremely small, could not be made out in detail.) 

 Maxillipeds (fig. 5/") somewhat aberrant; second joint very long and distally narrow, produced 



