NEW MARINE IS'OPODS) — MENZIES 155 



seem to warrant specific separation of the two, at least until definite 

 intermediate stages can be found. 



JAEROPSIS DUBIA PAUCISPINIS, new variety 



Figure 30, a, e 



A number of specimens having a cephalon color pattern similar 

 to that shown in figure 30, e, three spines on each lateral pleotelson 

 border, as shown in figure 30, «, and a heavily pigmented fourth 

 peraeon segment, might be considered as representing a distinct variety 

 of /. dubia. In all other respects the specimens are identical with 

 /. dubia. 



One specimen having two spines on each pleotelson lateral border 

 and a black middorsal line on the perion with the remainder of the 

 body white, appears closely related to the paucis'pinis variety. 



Specimens of the paucispinis variety were not infrequently col- 

 lected with specimens of /. dubia at localities around Dillon Beach 

 and Tomales Point, Marin County, Calif. 



Types. — Holotype and allotype collected at Dillon Beach, Marin 

 County, Calif., May 12, 1948, by R. J. Menzies. Type material has 

 been deposited as follows : 



United States National Museum, holotype male, No. 87711 ; allotype, 

 No. 87710 ; paratype made. No. 89055. Pacific Marine Station, 4 males 

 and 1 female paratypes, accession Nos. 1240-1242 Arth. 



LITERATURE CITED 



Baenard, K. H. 



1914. Contributions to the crustacean fauna of South Africa, 3; Additions 



to the marine Isopoda, with notes on some previously incompletely 



known species. Ann. South African Mus., vol. 10, pt. 11, No. 16, 



pp. 325a-35Sa, 359-442, 12 pis. 

 1925. A revision of the family Anthuridae (Crustacea Isopoda), with re- 

 marks on certain morphological peculiarities. Journ. Linn. Soc. 



Zool., vol. 35, pp. 109-160, 10 figs., 4 pis. 

 Beddaed, Frank Evers. 



1886. Report on the Isopoda collected by H. M. S. Challenger during the 



years 1873-76, pt. 2. Challenger Reports, Zoology, vol. 17, 175 pp., 



25 pis. 

 BooNE, Pearl Lee. 



1918. Description of ten new isopods. Proc. U. S. Nat. Mus., vol. 54, pp. 



591-604, 4 pis. 

 1923. New marine tanaid and isopod Crustacea from California. Proc. 



Biol. Soc. Washington, vol. 36, pp. 147-156. 

 BovALLiTJS, Carl. 



1881. lanthe, a new genus of Isopoda. Kongl, Svenska Vet.-Akad. Handl., 



vol. 6, No. 4, pp. 3-14, 3 pis. [Not seen.] 



