GAMMARIDEAN AMPHIPODA 15 



specimens of Ericthonius and was dominated numerically by Ampithoe 

 pollex and Elasmopus sp. 



Special attention has been given in this survey to beds of sea 

 anemones, Anthopleura elegantissima (Brandt), and the semi-solitary 

 Anthopleura xanthogrammica (Brandt), in a vain search for the 

 peculiar amphipod, Allogaussia recondita Stasek (1958). Anemone 

 beds have been sampled by scrapings, mass accessions, and by sucking 

 with large syringes. The type specimens of A. recondita were collected 

 from beds of A. elegantissima at Moss Beach (San Mateo County, 

 north of Monterey Bay). The southern intertidal limit of the amphipod 

 may be near Moss Beach. If and when captured the species is easy 

 to recognize because of its excellent description and large size. J. L. 

 Barnard (1964b) considers Allogaussia to be a synonym of Orchomene 

 but the problem remains whether the minute telsonic differences of 

 various allogausiids (primarily Antarctic) are indicative of some 

 overlooked morphological difference of greater magnitude. Some, but 

 not all, Antarctic allogausiids have distorted pereopods but so also 

 do some orchomeniids. Orchomeniids presumably are either benthic 

 deposit feeders or nektonic. Stasek's discovery of A. recondita in an 

 inquilinous habitat indicates an ecotype which may be distinguishable 

 by, as yet undetected, morphological or anatomical characters. On 

 the other hand, Lysianassa pariter not only occupies a habitat remote 

 from that of its relatives but it is not grossly distinct morphologically 

 from other species of Lysianassa. 



The diversity of Acanthonotozomatidae apparently is very poor 

 in Californian waters. That manifold family of primarily Antarctic 

 occurrence is characterized by piercing-and-sucking mouthparts. 

 Most of the 52 species may inhabit sessile hosts. Only two acanthono- 

 tozomatids, Panoploea rickettsi and a new panoploeid described 

 herein, have been found in California. Probably a closer inspection 

 of epifaunas by scuba divers would reveal more. The newly described 

 panoploeid was collected at Goleta on a holdfast of Macrocystis 

 pyrijera having a few intertangled sponges and tunicates. 



Washes of kelp holdfasts. — Tangled masses of the rhizomes of 

 the larger brown algae (the genera Macrocystis, Laminaria, Egregia, 

 and Postelsia) afford numerous nestling positions, protected substrate 

 for the attachment of domiciliary tubes and traps for sediments in 

 which burrowers may occur (tables 9, 18). These woody kelps also 

 provide niches for eophliantid plant burrowers, two of which have 

 been discovered for the first time in the northeastern Pacific Ocean. 



Holdfasts of Macrocystis are not of large dimensions in the Cali- 

 fornian intertidal but are comparable to those of Egregia and Lami- 

 naria. Of the stipes of the larger kelps only those of Egregia provide 

 a substrate for a poorly diversified amphipodan fauna (table 18); 



