63 



bears in the adult specimen a pair of well developed, plumose setae, but in the other specimen 

 only a pair of rudiments more like minute spines than setse. 



Length of the adult female 6.5 mm. 



Remarks. — This species is perhaps more allied to E. erythrophthalma Goës than 

 to any other form hitherto known, but it is easily distinguished from all European species by 

 having the telson considerably longer and armed with spines along its lateral margins. In these 

 respects it shows some resemblance to E. brevisquamosa Illig, but the latter species has very 

 small eyes, while these organs are very large in E. spinifera. 



Meterythrops S. J. Smith. 



The genus Parerythrops G. O. S. has been very fully described by Sars in 1870. 

 Meterythrops Smith is very closely allied to Parerythrops, the only goocl difference being the 

 first pair of male pleopods which in Parerythrops are quite rudimentary, in Meterythrops well 

 developed, having as in Erythrops the exopod long with several joints, the endopod short, 

 unjointed. According to my opinion, the genus Meterythrops and several other genera of this 

 subfamily are far from valuable, but for various reasons I cannot attempt a real revision of 

 the genera established, and therefore I think it better to keep the genus Meterythrops in the 

 present paper. 



35. Meterythrops indica n. sp. PI. IX, figs. 40 — 5 b. 



Stat. 230. November 14. Lat. 3°58'S., long. i28°2o'E. Hensen vertical net, from 2000 m. 

 to surface. 1 specimen, a probably adult male. 



Description. — This species is in general aspect and most features allied to M. picta 

 Holt & Tatt., but the antennal squama and the telson show some differences. The animal is 

 moderately robust. The carapace posteriorly deeply emarginate; its frontal plate is a broad, 

 low triangle with the vertex broadly rounded (fig. 4.0). Eyes large, especially very broad, pale 

 golden brownish; eye-stalks short. Antennular peduncle in the male thick; third joint scarcely 

 longer than the sum of the two proximal joints, only a little longer than broad, with the male 

 lobe proportionately large, protruding. Antennal squama nearly four times as long as broad, 



Erythrops minuta n. sp. 



Description. — Allied to the Norwegian E. serrata G. O. S. Eyes much smaller than in this species, depressed, seen from 

 above neavly semicircular, scarcely or slightly broader than the eye-stalks, the distal joint of which is strongly widened nearly from the 

 base, with the proximal two-thirds of its anterior margin very convex. Antennal squama about four times as long as broad; a terminal 

 lobe is scarcely developed, and the distal marginal denticle is long, strong and overreaches the subtransverse terminal margin very much; 

 the outer margin has besides three well developed, spiniform denticles, the proximal one a little more removed from the base than the 

 length of the interval between first and second denticle, while the intervals between all four denticles are nearly equally long. 



The telson is much broader than long; the posterior margin slightly more than one-third as long as the breadth, with 4 strong 

 spines and a pair of feathered setse; the interval between the spines of the inner pair is more than twice as long as the interval between 

 the two spines on the same half; in the female the spines of the inner pair are as long as the terminal margin and somewhat longer 

 than the outer pair, while in the male the inner spines are considerably longer than the terminal margin and twice as long as the outer 

 pair. — Length of an adult male 2.9 mm., of a female with marsupium 2.6 mm. 



Locality. — Gulf of Siam, at the island of Koh Kam, 10 fathoms, gravel and shells. A small number of specimens, mostly 

 very mutilated, have been taken by Dr. Th. Mortensen, February 4, 1900, and are preserved in the Copenhagen Museum. 



