574 ON THE CBUSTACEA OF THE " SKEAT EXPEDITION." [Dec. 3, 



II. I have since found that the name Actesopsis has already 

 heen used to designate a fossil genus (Carter, Q. J. Geol. Soc. liv. 

 1808), and must therefore be dropped. Under these aud the above 

 circumstances, I propose to rename the form Actites erythrus 1 . 



Although, as Dr. de Man has kindly pointed out to me in cor- 

 respondence, this form is remarkably like the Carpttodes hpliopxis 

 of Alcock (Journ. As. Soc. Bengal, 1898, p. 84, and Illustr. Zool. 

 4 Investigator,' 1899, pi. xxxvi. fig. 2), I still feel that I was right 

 in separating it from the genus Carpilodcs. 



It most obviously resembles Carjnhdes in the smooth and even 

 lobulation and grooving on the carapace ; but it also most obviously 

 differs from that genus in its prominent front, shape of lateral 

 margins, aud carinated legs. At the time I also saw what I 

 thought were palatal ridges, but, as Dr. de Man has since pointed 

 out to me, these are not true palatal ridges, but the " usual crests 

 situated at the antero-external angles of the endostome, as in 

 other species." Even so, however, the points I have enumerated 

 above would still prevent me from considering the species as a 

 Carjjilodes, the prominence of the front and the shape of the 

 lateral margins contribute to a fades so remarkably unlike that 

 of a true Carpilodes. As to whether Major Alcock's species 

 should also be included in my genus, I am unwilling to express 

 a definite opinion, as I have not seen the type specimens; but, 

 judging from the description and figure given, it would seem to be 

 not unlikely. 



EXPLANATION OF THE PLATES. 

 Plate XXXIII. 



Fig. 1. Lamhrus lippus (p. 536\ dorsal view. 



2. Potamon improvisum (p. 546). dorsal view. 



2 a. Young from beneath abdomen. 



3. Pinnotheres socius (p. 651), 3rd maxillipede. 



4. Pullman paucidens (p. 568), from left side. 



4 or, 4 J, 4 c. Different types of rostrum. 



Plate XXXIV. 



Fig. 1. Caridina gracillima (p. 500), from ri^ht side. 



2. Callianassa seeura (p. £55), from right side. 



2 a. Front of cai*apace. 



3. Automate dolichogvatha (p. 564), larger chelipede. 



3 a. Smaller chelipede. 



4. Palfpinon eguidena (p. 565), abnormal ehelipede. 



5. Pen<eus candticulatus tot.? (p 571). Theljcum. 



6. Pen (pus mutatns(p. 572). Petasma, anterior and posterior views. 



6 a. Thelycum. 



Qb. Anterior, 6 c. Posterior views of petasma. 



7. Penaus sp. (p. 571). Petasma, anterior and posterior views. 



7 «. Anterior, 7 b. Posterior views of petasma. 



1 Actites, = " a dweller by the shore," will also, I hope, indicate the close 

 position of this genus to the Actreids. 



