12 
RTLA 16. Largemouth bass, Micropterus salmoldes 
Material: One fish; 4 slides; 3 photographs 
Diagnosis: Intraepithelial hyperpigmentation by numerous dendritic 
melanocytes in all layers of epidermis 
Submitter: C. J. Dawe 
RTLA 17. Dagger shrimp, Palaemonetes pugio 
Material: One slide 
Diagnosis: Metacercaria of Microphallus turgida infected with 
a haplosporidium, Urosporidium fuliginosum 
Submitter: R. W. Heard 
RTLA 18. Atlantic needlefish, Strongylura marina 
Material: Sixteen heads of fish; 3 slides; photographs 
Diagnosis: Chronic inflammation due to copepod parasites in the jaw 
Submitter: J. M. Arnold 
Reprint: Cressey, Roger F. and Bruce B. Collette. Copepods and 
Needlefishes: A Study in Host-Parasite Relationships. 
U.S. Fish Wildl. Serv. Fish. Bull., 68(3): 347-432. 1970, 
RTLA 19. Atlantic octopus, Octopus vulgaris 
Material: One paraffin embedded block; 5 slides; 2 photographs 
Diagnosis: Probable wound repair and hyperplasia in web area be¬ 
tween the two anterior arms 
Submitter: J. M. Arnold 
RTLA 20. California sea mussel, Mytilus californianus 
Material: Two slides 
Diagnosis: Digestive gland lesions caused by haplosporidian parasites 
Submitter: R. L. Taylor 
Reprint: Taylor, Ronald L. Haplosporidium tumefacientis sp„ n., 
the Etiologic Agent of a Disease of the California Sea 
Mussel, Mytilus californianus Conrad. J. Invertebr. 
Pathol., 8(1): 109-121. 1966. 
RTLA 21. Gaper 
Material: 
Diagnosis: 
Submitter: 
Reprint: 
clam, Tresus nuttalli 
Two slides 
Inflammatory reaction of foot muscle; associated 
with unclassified microbes producing exophytic lesions 
R. L. Taylor and A. C. Smith 
Taylor, Ronald L. and Albert C. Smith. Polypoid and 
Papillary Lesions in the Foot of the Gaper Clam, 
Tresus nuttalli . J. Invertebr. Pathol., 8/2): 264-266. 
1966. 
RTLA 22. Walleye, Stizostedion vitreum vitreum 
Material: One fish; 14 slides 
Diagnosis: Lymphocys tis 
Submitter: M. Stanton 
RTLA 23. Chain pickerel, Esox niger 
Material: Two slides 
Diagnosis: Parasitic infestation of gills; unclassified protozoan 
Submitter: C. J. Dawe 
