1884.] CRUSTACEANS FROM MAURITIUS. 1.) 



Callianassa mauritiana, described in my last notice of the Crus- 

 tacea received from M. Robillard, differs altogether from C. mar- 

 tensi in the form of the front and larger chelipede (see fig. 2). 



Callianassa madagassa, Lenz and Richters 1 , from Madagascar, is 

 at once distinguished by the absence of lateral spinules from the front 

 and the remarkable spinulation of the fingers of the right chelipede 

 from C. martensii, and the form of the terminal segment and 

 uropoda is very different from' that of O. mauritiana 2 . 



Pen^eus monodon. 



Peneeus monodon, Fabricius, Entom. Svst. Supplementum, p. 408 

 (1798); M.-Edwards, Hist. Nat. des Crust, ii. p. 416 (1837); 

 S. Bate, Ann. & Mag. Nat. Hist. (ser. 5), viii. p. 178, pi. xii. 

 fig, 5 v.p. (1881). 



An adult female of very large size was received from M. Robillard 

 at the beginning of the year. 



If Mr. Spence Bate is right in his synonymical citations as regards 

 this species, it ranges throughout the Oriental Region. 



SOLENOCERA LUCASII? 



1 Solenocera lucasii, S. Bate, Annals & Mag. of Nat. Hist. (ser. 5), 

 viii. p. 185 (1881). 



I refer to this species with much doubt a small female, which 

 differs from Mr. Spence Bate's diagnosis in the somewhat more 

 numerous and differently disposed teeth of the rostrum ; aud to 

 facilitate its future identification (since the original diagnosis is in 

 few words) I subjoin the following description. 



Mr. S. Bate's type was dredged in \'.',0 fathoms south of New 

 Guinea, and is of much larger size. 



Carapace nearly smooth, with the cervical and hepatic sutures 

 distinct, and armed with a distinct antennal and a small hepatic 

 spine, and with a small spine (the supraorbital ?) on either side of 

 the rostrum, placed a short distance behind the anterior margin of the 

 carapace. There is no pterygostomian spine. The rostrum is shorter 

 than the eyes (but broken at the tip), ascends very slightly from the 

 base, and is armed above with eight or nine blunt serraturesor teeth, 

 whereof the three posterior are placed on the dorsal surface of the 

 carapace and the last is separated by a much wider interval from the 

 rest than these are from one another; there is no median dorsal carina 

 on the carapace behind the last tooth. The eyes are moderately large ; 

 ophthalmopod setose at base on its upper surface. The segments 

 of the postabdomen are nearly smooth, the fourth to sixth distinctly 

 longitudinally carinated on the dorsal surface, and the third less 

 distinctly so ; the carina on the sixth segment ends posteriorly in a 



1 Abhandl. d. Senckenb. Naturforsch. Gesellschaft. xii. p. 427, figs. 20-23 

 (1881). 



2 The larger chelipede of C. martensi bears a very close resemblance to the 

 mutilated fossil claw from the Trocadero, described and figured by A. Milne- 

 Edwards as C. parisiensis {t. c. p. 99, pi. ii. f. 3) ; but C.parisUnsh is too imper- , 

 fectly known to be certainly identified with any recent species of the genus. 



