﻿MARINE ASELLOTE ISOPODS — MENZIES 145 



Vvopodn. — Inner branch as wide as and slightly longer than outer 

 branch. Basal segment shorter than inner branch. 



Tijpes. — Holotype male collected at the type locality, Tomales Point, 

 bay side near channel, Marin County, Calif., November 28, 19-17, by 

 R. J. Menzies; type found on Macrocystis holdfast. Type material 

 has been deposited as follows : 



United States National Museum, male holotype (No. 89535), allo- 

 type, and 15 paratypes. Allan Hancock Foundation, 6 paratypes. 

 Universitets Zoologiske Museum, Oslo, Norway, 4 paratypes. Rijks- 

 museum Van Natuurlijke Historie, Leiden, Holland, 4 paratypes. 

 Pacific Marine Station, 11 paratypes, accession numbers 1320-1322 

 Arth. University of Washington, 11 paratypes. 



Geograpical distrihution. — Turn Island, Wash., to Marin County, 

 Calif. 



MateHal examined. — In addition to the holotype the following 

 specimens were examined : 



Washington : Turn Island^ Turn Rock, under rock at low tide, July 

 17, 1940, 11 paratypes, F. A. Pitelka collector. California: Marin 

 County., Tomales Point, bay side, Egregla and Laminaria holdfasts, 

 November 30, 1947, three males and one female, paratypes, collected 

 by R. J. Menzies. Dillon Beach, Second Sled Road, under rocks, 

 February 21, 1948, 13 paratypes, collected by R. J. Menzies; from 

 Laminaria holdfast, March 22, 1948, 6 paratypes, R. J. Menzies, col- 

 lector ; under rocks and on Laminaria holdfasts, May 12, 1948, 16 para- 

 types, collected by R. J. Menzies. 



Ecology. — Most specimens were found under rocks in the lower in- 

 tertidal zones and among holdfasts of the algae Macrocystis., Lami- 

 7Mria, and Egregia. Ovigerous specimens were observed during Feb- 

 ruary and May. 



Remarks. — The specimens reported by Dr. Melville Hatch from 

 Washington as Janira maculosa have been examined and in my opin- 

 ion they belong to this species. laniropsis analoga differs from /. 

 hrevire7nis (G. O. Sars) in the following features : 1, Posterior margin 

 of male first pleopods distinctly curving posteriorly, lateral apices 

 pointed, not minutely bifid ; 2, cephalon frontal margin slightly trilo- 

 bate, not transverse. 



lANIROPSIS MAGNOCULA, new species 

 FiGUKES 63-65 



Holotype. — Female with partly developed oostegites, length 2.2 

 mm., width 0.8 mm. 



Diagnosis. — Cephalon with conspicuous f rontally projecting antero- 

 lateral angles; frontal margin with a very short, yet evident, rostrum. 



