378 



lateral corners forming a short deliexed lajijoet, acute at the tij). The 3 anterior 

 pairs of coxal plates rapidly increasing in size, and having the outer part 

 somewhat curved, and tapering to a point ; 4th pair aboiit as deep as the pre- 

 ceding pair, but much broader, securiform in shape, outer part triangularly 

 pointed, posterior projection rather produced; the 2 succeeding pairs with the 

 posterior lobe deeper than the anterior, and subtruncated at the tip. Last pair of 

 epinieral plates of metasome divided at the lateral corners into 2 triangular lap- 

 pets of about equal size, and separated by a broad sinus. Eyes very large, reni- 

 forni, pigment dark red, or purplish. Superior antennae about equalling '/a of the 

 length of the body, 1st joint of the peduncle exceeding in length the other 



2 combined, and prodiiced at the end posteriorly to an acuminate projection, 

 2nd joint forming anteriorly a similar but smaller projection, ilagellum nearly 



3 times as long as the peduncle, and composed of about 24 articulations, each 

 having anteriorly a fascicle of delicate sensory bristles, more strongly deve- 

 loped in the male. Inferior antennae of nearly exactly same length as the 

 superior, last joint of the peduncle longer than the penultimate one, flagellum 

 about twice the length of the peduncle. First pair of maxillae with the palp 

 well developed, reaching considerably beyond the masticatory lobe. Maxilli- 

 peds with the 1st joint of the palp equalling in length the other 2 combined. 

 Anterior gnathopoda extremely slender, and nearly naked, basal joint somewhat 

 ilexuous, propodos aboirt the length of the 2 preceding joints combined, chela 

 occupying Va of the length of the propodos, thumb scarcely broader than the 

 dactylus, the latter slightlj^ denticulated in its outer part. Posterior gnatho- 

 poda about the length of the anterior, but somewhat less slender, propodos 

 nearly linear in form, and setous on both edges, thumb of the chela much 

 broader than the dactylus. Basal joint of the 3 posterior pairs of pereiopoda 

 oval quadrangular in form, infero-posteal corner nearly rectangiilar, in the 

 last pair somewhat more acutely produced. Last pair of uropoda with the 

 rami nearly equal in length. Telson oblong quadrangular in form, but little 

 tapering distally, terminal lobes accuminate and diverging, apical incision 

 nearly rectangular. Body whitish, with a faint yellowish tinge, each segment 

 ornamented with numerous reddish-brown specks arranged in narrow trans- 

 verse bands having between them a clear golden j'ellow pigment, the bands 

 extending also down the coxal plates and the basal joints of the posterior 

 pairs of pereiopoda, and being more numeroiis on the segments of metasome. 

 Length of adult female reaching 12 mm. ; that of male considerably less. 



BcniarJis. — This form has been rather minutely described and figured 

 by Rathke in the above-cited work, and it thus appears very strange that 

 Kroyer could not recognize the species but described it as a new genus and 

 species, under the name oi Microdicles armafa. The species in (question, which 



