VX. XVI. 



189.). 



J PKOCKK DINGS OF J'Jfi: NATIONAL MUSEUM. 253 



Stalked, filliiij; tlic orbits. Siil»lM'|»at ic, regions deeply channeled. Abdo- 

 men in miile with five scjiinents, th(5 sci^ond witli a tliin, ]»rominent 

 trilobcd (;rest, lobes iiiinntely cienuhite. Antennje lonj?; antennules 

 oblique. Maxillipeds as in Die |,^enus. (Jlielijieds granulate, very nn- 

 ('(jual; large elieliped wifli thice spines on (h(i anterior portion of tlie 

 nierns, the inner very small, the outer the largest and of moderate 

 length ; liand not very deep, nine-toothed above; an irregular crest near 

 tlieJower margin bears a sharp S])ine near tlui n)erus; small cheliped 

 with merus onespined; hand witli about eleven small irregular teeth 

 above; both hands have the lower margin spinuliferous. Ambulatory 

 legs with granulated lines on tlie ui)per surface of the carpal joints. 



The alcoholic; sju'eimen has ting(!S of red on the carai)ace and clieli- 

 ped« and an elongated i)atch of red on the inner surface of the hand 

 near tlie dactyl. 



Length, in median line, 20; width, without spines, .30; length of lateral 

 spine, measured on its posterior margin, i millimeters. 



Off the Sandwich Islands, lat. L'l^ 12' N., long. 1.57'^ 49' W,, 20.5 

 fathoms, tine white sand, station 3472, U. S. Fish Commission steamer 

 Albatross, 1801 ; one male (1751.'5). 



This species is nearly related to ^1/. curtispina Miers, but differs in 

 the shorter lateral spines and the character of the hands; in M. haicnii- 

 CHsis the hand is less deep, the crest more continuous and i)rominent 

 the sinuses of the uppei- margin narrower. The innei- subocular lobe 

 is regularly triangular and does not exceed the basal antennal Joint, 

 instead of being rounded, Avith a produced acuminate tip as in curti- 

 spina. The almost entire obsolescence of the median lobe of the pos- 

 terior margin also distinguishes this species from curtispina, and con- 

 nects it with annata de Haan. 



Platymera californiensis. 



This species is closely alli(;d to /'. (laiuUchaudil from the coast of Chile. 

 It agrees with Milne Edwards's bri(!f description of that species,* but 

 differs in many respects from the iigure in d'Orbigny's Atlas.f 



The anterolateral teeth aie smaller and are distinctly sei)arated by 

 broad, shallow sinuses. The tubercuh)us ridge on the j»alm is nearer 

 the lower crest; the second and third teeth of the upper margin, count 

 ing from the caj7)us, are larger and stronger than in f/andiehandii. The 

 ambulatory legs are narrower; this is especially noticeable in thefourf h 

 and fifth joints; the fifth joint of the first three pairs is not so distinctly 

 granulate as in the figure. The external inaxillijieds ai-e granulate, 

 e-pe<-ially the ischium, which has also strong irregular teeth on its inner 

 margins. The laised i)ortions of the carapace have a nund)er of de- 



" Hist. Nat. Crust., ii, p. 108, 1837. 



t Millie Edwards and Lucas, d'0rl)i{,'ay'8 Voy. l'Arn<;r, Mdrid., atlas, Crqstac^s, pi, 

 XIII, fig. 1, 1843. 



