If someone else has it I think the paper below covers some of those. I don't have access to the journal, or a copy myself.
Hylleberg, J. ; Nateewathana, A. 1991: Polychaetes of Thailand, Spionidae (Part 1); Prionospio of the steenstrupi group with description of eight new species from the Andaman Sea. Phuket Marine Biological Center, Research Bulletin 55: 1-32.
P. membranacea is an Imajima species
Imajima, M. 1990: Spionidae (Annelida, Polychaeta), from Japan IV. The genus Prionospio (Prionospio). Bulletin of the National Science Museum Series A (Zoology) 16(3): 105-140.
It is online directly at: http://ci.nii.ac.jp/naid/110004311741/en/
Also search down in http://ci.nii.ac.jp/en?TZ=20080419164525414 as Imajima's papers on other putative Prionospio subgenera are online.
>>> On 18/04/2008 at 4:08 p.m., "smitha ck" <smithack07 from gmail.com> wrote:
> * Hi all,
>> I am a research fellow from India and working on Taxonomy of Polychaetes of
> the Continental Shelf of India.
>> Does anyone have a pdf copy of the description of Prionospio
> Prionospio (Prionospio) lineata, Prionospio membranacea, Prionospio
> multibranchiata, Prionospio (Prionospio) cf cornuta, Prionospio
> runei and Prionospio (Minuspio) sp. ? If with you, please send me a copy
> of that. That will be very much helpful for my work.
>> Thanks in advance.
> Smitha C K
> Department of Marine Biology,Micrbiology & Biochemistry
> School of Ocean Science & Technology
> Cochin University of Science & Technology
Geoff Read <g.read from niwa.co.nz>