REPORT ON THE CRUSTACEA MACRURA. 99 



Two specimens of this species were taken associated with Phyllosoma furcicaudatum. 

 For temporary convenience I shall designate them after the locality at which they were 

 taken, although I believe that they are the same species at different ages. The smaller 

 one is little larger than the length of the brephalos when it qnits the ovum. The second 

 corresponds in all respects excepting that it is a little more developed. They both 

 resemble Phyllosoma furcicaudatum in all the appendages that are developed, excepting 

 the ophthalmopoda, antennae, and pleon. 



The ophthalmopoda have the peduncle and the ophthalmus subequal in length, the 

 latter is pear-shaped and articulated with the peduncle. 



The first pair of antennas is single-branched, cylindrical, and nearly one-third the 

 length of the carapace. 



The second pair resembles the first both in size and length. 



The second pair of siagnopoda is Inarticulate, but small and rudimentary (PI. XIId. 

 %• 2/). 



The third is not yet present. 



The two pairs of gnathopoda and the three anterior pairs of pereiopoda are well 

 developed, and correspond nearly with those of Phyllosoma furcicaudatum, excepting in 

 having the dactyli comparatively longer, as well as the several spinous teeth upon the 

 respective joints also. 



The fourth pair is present in the form of incipient buds, while the fifth pair is not 

 as yet represented. 



The pleon is feeble, cylindrical, and terminates at the external lateral angles with a 

 small tooth and a minute hair (PI. XIId. fig. 2z). 



Phyllosoma philippinense (PL XIId. fig. 3). 



Habitat. — Taken off the PLulippine Islands, October 23, 1874. 

 Length 2 mm. 



This species corresponds very closely with that taken off Samboangan, and is no doubt 

 closely related to it. It differs somewhat in the form of the ophthalmopoda, as 

 represented in the plate, but I am inclined to believe that those of Phyllosomn 

 samboangense are altered in form from the manner of preservation. All the appendages are 

 similarly developed and show the same characteristic features, except that the posterior 

 pair of the developed pereiopoda, which correspond to the third pair in the adult, has no 

 basecphysis, but has on the posterior margin, one-third from the coxal articulation, a 

 strongly formed tooth-like process ; the morphological valueof which is yet to be determine<l. 



The pleon is slightly tapering, and terminates on each postero-lateral angle with a 

 small tooth (PL XIId. fig. 3z). 



