20 Broom-tail Grouper, Mvcteroperca xenarcha (Jordan) 
Four were taken at Magdalena Bay, July 18th. A very well marked 
species. The "broom-tail" which gives this species its common 
name, and the pointed dorsal and anal fins quickly distinguish 
this Grouper from its cogeners on the west coast. 
21. Leopard Grouper, Mycteroperca pardali_s_ (Gilbert) , , , TVl . 
Taken off the Lower California coast an d at Socorro Island . The 
heaviest specimen seen, one of about 20 pounds in weight was 
caught by Colonel Watson at Cape San Lucas, July 19th. 
22 *Gulf Grouper, Mvcteroperca .jordani (Jenkins and Evermann) 
A twenty* 3 pound specimen of this species taken off San Jose del Cabo 
Bay, Cape San Lucas, July 19th, was saved because so iar as 1 am 
aware, it represents a first record for the species south of 
Cerralvo Island on the western side of the Gulf of California. On 
the eastern side of the Gulf this Grouper has been found along the 
Mexican coast as far south as Mazatlan. 
23. Colorado Grouper, Mvcteroperca o lfax (Jenyns) . , 
The common and abundant Grouper of the Galapagos Islands; heaviest 
taken during the cruise believed to have weighed about thirtynine 
pounds . 
The yellow or Golden Grouper of the Galapagos Islands is but a color 
phase of the preceding. The heaviest, nineteen pounds was caught by 
Mr. Early at Sulivan Bay, James Island, July 24th. Colonel Watson 
also caught one of this weight the day following off Tagus Cove, 
Altamarle Island. Two others were taken off Hood Island, July *8th. 
These strikingly colored Groupers were saved for mounting. Color 
photographed . 
24. Spotted Cabrilla, Epinephelus analogus. ^Gill^ 
One specimen taken at Socorro Island, July 20th. 
25. Rock Bass, Paralabrax Iftaculatof asciatus. (Steindacher) 
Taken at Cedros Island, July 17th. 
26. Sand Bass, Paralabrax 
Taken at Cedros Island, July 17th. — — - 
27. Kelp Bass, Paralabrax clathratus (Girard) 
Taken at Cedros Island, July 17th and in Magdalena Bay, July 18th. 
28. White-spotted Rock Bass, Paralabrax albomaculatus (Jenyns) 
Abundant on the west side of Albemarle Island, July 25th to 26th; 
over a washtub full was taken on the second of the two days by mem- 
bers of the crew fishing over the side. \ 
29* Southern Creole Fish, Paranthias furcifer (Cuvier and Valenciennes) 
About a dozen were caught by the President in Gardner Bay, Hood 
Island, July 28th; and brought back to the ship alive; color 
photographed. 
30. Grey Thread-fin Bass, Cratinus agassizii Steindacher 
First one of the cruise was caught by the President off Tagus Cove, 
Albemarle Island, July 25th. This and f®Ml2 other specimens from 
Elizabeth Bay, Albemarle Island, July 26th, were saved. A grey 
thread-fin bass eaten by the President’s Mess was pronounced "very 
good eating." This species was also found at South Seymour Island, 
July 29th. 
(Family Sciaenidae - The Croakers) 
31. California White Sea Bass, Cynoscion nobilis (Ayers) 
A thirty pound specimen was captured at Magdalena Bay, July 18th. 
iv 
(Family Branchiostegidae) 
32. Ocean Whitefish, Caulolatilus princeps (Jenyns) 
Several were taken both by the fishing parties and over the ship’s 
side at Cedros Island, July 17th; one of twenty inches standard 
length at Sulivan Bay, James Island, July 24th and west side of 
Albemarle Island, July 25th and July 26th. 
(Family Sphyraenidae - The Barracudas) 
33. Southern Barracuda, Sphyraena idiastes Heller and Snodgrass 
The six specimens taken were saved; all from the Galapagos Islands 
as follows: One from Tagus Channel, Albemarle Island, July 25th; 
two from the east side of Hood Island, July 28th; and three from 
off the north end of South Seymour Island, July 29th. The color 
pattern of freshly caught specimens closely resembled the color 
plate given by Walford in his "Marine Game Fishes" 1937, for the 
Mexican Barracuda (Plate 66, fig. b) , but aside from markings they 
were silvery all over as is Walford ’s figure below the lateral 
line- On the basis of coloration alone the Southern Barracuda 
might be mistaken for the Mexican species. 
34 • California or Mexican Barracuda, Sphyraena sp. 
One barracuda which I did not get to see was captured in Magdalena 
Bay, July 18th. It could have only been one of two species, the 
California S. argentea /Girard^ s or the Mexican S. ensis /Jordan and 
Gilbert^. Both are known to occur in Magdalena Bay. 
35. Great Barracuda, Sphyraena barracuda (Walbaum) 
Two small specimens of this species were hooked off Old Providence 
Island, August 6th. 
(Family Chaetodontidae - The Butterfly-fishes) 
36. Pacific Rock Beauty, Holacanthus passer Valenciennes 
Two specimens only; caught in Gardner Bay, Hood Island, July 27th; 
saved for mounting; color photographed. 
(Family Carchariidae - The Grey or Tiger Sharks) 
37. Tiger Shark, Galeocerdo arcticus (Faber) 
Most if not all of the Sharks taken during the cruise were of this 
species. The largest weighing between 225 and 230 pounds was caught 
by the President at Cocos Island, August 30th; color photographed. 
A second specimen of good size was taken at Elizabeth Bay, Albemarle 
Island, July 26th, and one of sixty pounds at Clipperton, July 21st. 
This last was in the younger, spotted and black-barred phase; also 
color photographed. The tiger sharks lose this very characteristic 
marking of the young with age. Mr. Early landed a 175-pound Shark 
after a two hour figh£. 
(Family Mobulidae - The Giant Rays, Mantas or Sea Devils) 
38. Manta, Giant Ray, Manta birostris (Walbaum) 
One was taken by the U.S.S. McDougal off Chatham Bay, Cocos Island 
August 2nd. It weighed 1,645 pounds; 15 feet wide and 9 feet long, 
exclusive of a 4 foot tail. 
Blue and green parrot fish were plentiful at Clipperton Island but 
none were secured and so not identified. Similar "parrots" were observed 
at Cocos Island. 
v 
