diff --git a/ukwa_api/collections/router.py b/ukwa_api/collections/router.py
index 1d5c34a..0ae6f6d 100644
--- a/ukwa_api/collections/router.py
+++ b/ukwa_api/collections/router.py
@@ -4,6 +4,7 @@
 import os
 
 JSON_DIR = os.environ.get("JSON_DIR","test/data/collections/")
+JSON_DIR = JSON_DIR.rstrip("/") + "/"
 
 # Setup a router:
 router = APIRouter(
diff --git a/ukwa_api/mementos/router.py b/ukwa_api/mementos/router.py
index d3b0e76..c811dbf 100644
--- a/ukwa_api/mementos/router.py
+++ b/ukwa_api/mementos/router.py
@@ -71,15 +71,21 @@ async def lookup_url(
     ),
     matchType: Optional[schemas.LookupMatchType] = Query(
         schemas.LookupMatchType.exact,
-        title='Type of match to look for.'
-    ),
+        # description unfortunately dupes the "Available values" list but I couldn't find a way to suppress the latter.
+        description="""Type of match to look for.<br><br>
+                       exact       - return captures exactly matching input url<br>
+                       prefix      - return captures beginning input path<br>
+                       host        - return captures belonging to input host<br>
+                       domain      - as host, but also return captures belonging to subdomains<br>
+                    """
+       ),
     sort: Optional[schemas.LookupSort] = Query(
         schemas.LookupSort.default,
-        title='Order to return results.'
-    ),
+        description='Order to return results. Reverse order not recommended for large result sets.'    
+        ),
     limit: Union[int, None] = Query(
         None, 
-        title='Number of matching records to return.'
+        description='Number of matching records to return.'
     ),
 ):
     # Only put through allowed parameters:
diff --git a/ukwa_api/mementos/schemas.py b/ukwa_api/mementos/schemas.py
index 64fd339..0f631f3 100644
--- a/ukwa_api/mementos/schemas.py
+++ b/ukwa_api/mementos/schemas.py
@@ -12,11 +12,9 @@ class LookupMatchType(Enum):
     prefix = 'prefix'
     host = 'host'
     domain = 'domain'
-    range = 'range'
 
 class LookupSort(Enum):
     default = 'default'
-    closest = 'closest'
     reverse = 'reverse'